task_url stringlengths 30 116 | task_name stringlengths 2 86 | task_description stringlengths 0 14.4k | language_url stringlengths 2 53 | language_name stringlengths 1 52 | code stringlengths 0 61.9k |
|---|---|---|---|---|---|
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #jq | jq | # In case your jq does not have "until" defined:
def until(cond; next):
def _until:
if cond then . else (next|_until) end;
_until;
# Zeller's Congruence from [[Day_of_the_week#jq]]
# Use Zeller's Congruence to determine the day of the week, given
# year, month and day as integers in the conventional way.
# ... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Julia | Julia |
isdefined(:Date) || using Dates
const wday = Dates.Sun
const lo = 1
const hi = 12
print("\nThis script will print the last ", Dates.dayname(wday))
println("s of each month of the year given.")
println("(Leave input empty to quit.)")
while true
print("\nYear> ")
y = chomp(readline())
0 < length(y) ||... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Ring | Ring |
# Project : Find the intersection of two lines
xa=4
ya=0
xb=6
yb=10
xc=0
yc=3
xd=10
yd=7
see "the two lines are:" + nl
see "yab=" + (ya-xa*((yb-ya)/(xb-xa))) + "+x*" + ((yb-ya)/(xb-xa)) + nl
see "ycd=" + (yc-xc*((yd-yc)/(xd-xc))) + "+x*" + ((yd-yc)/(xd-xc)) + nl
x=((yc-xc*((yd-yc)/(xd-xc)))-(ya-xa*((yb-ya)/(xb-xa))... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Ruby | Ruby | Point = Struct.new(:x, :y)
class Line
attr_reader :a, :b
def initialize(point1, point2)
@a = (point1.y - point2.y).fdiv(point1.x - point2.x)
@b = point1.y - @a*point1.x
end
def intersect(other)
return nil if @a == other.a
x = (other.b - @b).fdiv(@a - other.a)
y = @a*x + @b
Point.ne... |
http://rosettacode.org/wiki/Find_the_intersection_of_a_line_with_a_plane | Find the intersection of a line with a plane | Finding the intersection of an infinite ray with a plane in 3D is an important topic in collision detection.
Task
Find the point of intersection for the infinite ray with direction (0, -1, -1) passing through position (0, 0, 10) with the infinite plane with a normal vector of (0, 0, 1) and which passes ... | #Visual_Basic_.NET | Visual Basic .NET | Module Module1
Class Vector3D
Private ReadOnly x As Double
Private ReadOnly y As Double
Private ReadOnly z As Double
Sub New(nx As Double, ny As Double, nz As Double)
x = nx
y = ny
z = nz
End Sub
Public Function Dot(rhs As Vec... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #BaCon | BaCon | for n in {1..100}; do ((( n % 15 == 0 )) && echo 'FizzBuzz') || ((( n % 5 == 0 )) && echo 'Buzz') || ((( n % 3 == 0 )) && echo 'Fizz') || echo $n; done |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Lasso | Lasso | local(
months = array(1, 3, 5, 7, 8, 10, 12),
fivemonths = array,
emptyears = array,
checkdate = date,
countyear
)
#checkdate -> day = 1
loop(-from = 1900, -to = 2100) => {
#countyear = false
#checkdate -> year = loop_count
with month in #months
do {
#checkdate -> month = #month
if(#checkdate ->... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Lua | Lua |
local months={"JAN","MAR","MAY","JUL","AUG","OCT","DEC"}
local daysPerMonth={31+28,31+30,31+30,31,31+30,31+30,0}
function find5weMonths(year)
local list={}
local startday=((year-1)*365+math.floor((year-1)/4)-math.floor((year-1)/100)+math.floor((year-1)/400))%7
for i,v in ipairs(daysPerMonth) do
if start... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #OCaml | OCaml | # let cube x = x ** 3. ;;
val cube : float -> float = <fun>
# let croot x = x ** (1. /. 3.) ;;
val croot : float -> float = <fun>
# let compose f g = fun x -> f (g x) ;; (* we could have written "let compose f g x = f (g x)" but we show this for clarity *)
val compose : ('a -> 'b) -> ('c -> 'a) -> 'c -> 'b = <fun>... |
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #Scala | Scala | import scala.util.Random
class Forest(matrix:Array[Array[Char]]){
import Forest._
val f=0.01; // auto combustion probability
val p=0.1; // tree creation probability
val rows=matrix.size
val cols=matrix(0).size
def evolve():Forest=new Forest(Array.tabulate(rows, cols){(y,x)=>
matrix(y)(x) match {
... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #Java | Java | import java.util.LinkedList;
import java.util.List;
public final class FlattenUtil {
public static List<Object> flatten(List<?> list) {
List<Object> retVal = new LinkedList<Object>();
flatten(list, retVal);
return retVal;
}
public static void flatten(List<?> fromTreeList, List<Object> toFlatList) {
f... |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Prolog | Prolog | floyd(N) :-
forall(between(1, N, I),
( forall(between(1,I, J),
( Last is N * (N-1)/2+J,
V is I * (I-1) /2 + J,
get_column(Last, C),
sformat(AR, '~~t~~w~~~w| ', [C]),
sformat(AF, AR, [V]),
writef(AF))),
nl)).
get_column(Last, C) :-
name(Last, N1),... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #Icon_and_Unicon | Icon and Unicon | link strings # for permutes
procedure main()
givens := set![ "ABCD", "CABD", "ACDB", "DACB", "BCDA", "ACBD", "ADCB", "CDAB", "DABC", "BCAD", "CADB",
"CDBA", "CBAD", "ABDC", "ADBC", "BDCA", "DCBA", "BACD", "BADC", "BDAC", "CBDA", "DBCA", "DCAB"]
every insert(full := set(), permutes("ABCD")) # ge... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #K | K |
/ List the dates of last Sundays of each month of
/ a given year
/ lastsundt.k
isleap: {(+/~x!' 4 100 400)!2}
wd: {(_jd x)!7}
dom: (31;28;31;30;31;30;31;31;30;31;30;31)
init: {:[isleap x;dom[1]::29;dom[1]::28]}
wdme: {[m;y]; init y; dt:(10000*y)+(100*m)+dom[m-1];jd::(_jd dt);mewd::(wd dt)}
lsd: {[m;y]; wdme[m;y];:[... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Kotlin | Kotlin | // version 1.0.6
import java.util.*
fun main(args: Array<String>) {
print("Enter a year : ")
val year = readLine()!!.toInt()
println("The last Sundays of each month in $year are as follows:")
val calendar = GregorianCalendar(year, 0, 31)
for (month in 1..12) {
val daysInMonth = calenda... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Rust | Rust | #[derive(Copy, Clone, Debug)]
struct Point {
x: f64,
y: f64,
}
impl Point {
pub fn new(x: f64, y: f64) -> Self {
Point { x, y }
}
}
#[derive(Copy, Clone, Debug)]
struct Line(Point, Point);
impl Line {
pub fn intersect(self, other: Self) -> Option<Point> {
let a1 = self.1.y - se... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Scala | Scala | object Intersection extends App {
val (l1, l2) = (LineF(PointF(4, 0), PointF(6, 10)), LineF(PointF(0, 3), PointF(10, 7)))
def findIntersection(l1: LineF, l2: LineF): PointF = {
val a1 = l1.e.y - l1.s.y
val b1 = l1.s.x - l1.e.x
val c1 = a1 * l1.s.x + b1 * l1.s.y
val a2 = l2.e.y - l2.s.y
val b... |
http://rosettacode.org/wiki/Find_the_intersection_of_a_line_with_a_plane | Find the intersection of a line with a plane | Finding the intersection of an infinite ray with a plane in 3D is an important topic in collision detection.
Task
Find the point of intersection for the infinite ray with direction (0, -1, -1) passing through position (0, 0, 10) with the infinite plane with a normal vector of (0, 0, 1) and which passes ... | #Wren | Wren | class Vector3D {
construct new(x, y, z) {
_x = x
_y = y
_z = z
}
x { _x }
y { _y }
z { _z }
+(v) { Vector3D.new(_x + v.x, _y + v.y, _z + v.z) }
-(v) { Vector3D.new(_x - v.x, _y - v.y, _z - v.z) }
*(s) { Vector3D.new(s * _x, s * _y, s * _z) }
dot(v) {... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #bash | bash | for n in {1..100}; do ((( n % 15 == 0 )) && echo 'FizzBuzz') || ((( n % 5 == 0 )) && echo 'Buzz') || ((( n % 3 == 0 )) && echo 'Fizz') || echo $n; done |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Maple | Maple | five_weekends:= proc()
local i, month, count;
#Only months with 31 days can possibly satisfy the condition
local long_months := [1,3,5,7,8,10,12];
local months := ["January","February","March","April","May","June","July","August","September","October","November","December"];
count := 0;
for i from 1900 to 2100 by... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Mathematica_.2F_Wolfram_Language | Mathematica / Wolfram Language | years = {1900, 2100}; months = {1 ,3 ,5 ,7 ,8 ,10 ,12};
result = Select[Tuples[{Range@@years, months}], (DateString[# ~ Join ~ 1, "DayNameShort"] == "Fri")&];
Print[result // Length," months with 5 weekends" ];
Print["First months: ", DateString[#,{"MonthName"," ","Year"}]& /@ result[[1 ;; 5]]];
Print["Last months: ... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #Octave | Octave | function r = cube(x)
r = x.^3;
endfunction
function r = croot(x)
r = x.^(1/3);
endfunction
compose = @(f,g) @(x) f(g(x));
f1 = {@sin, @cos, @cube};
f2 = {@asin, @acos, @croot};
for i = 1:3
disp(compose(f1{i}, f2{i})(.5))
endfor |
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #Sidef | Sidef | define w = `tput cols`.to_i-1
define h = `tput lines`.to_i-1
define r = "\033[H"
define red = "\033[31m"
define green = "\033[32m"
define yellow = "\033[33m"
define chars = [' ', green+'*', yellow+'&', red+'&']
define tree_prob = 0.05
define burn_prob = 0.0002
enum |Empty, Tree, Heating, Burning|
define dirs ... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #JavaScript | JavaScript | function flatten(list) {
return list.reduce(function (acc, val) {
return acc.concat(val.constructor === Array ? flatten(val) : val);
}, []);
} |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #PureBasic | PureBasic | Procedure.i sumTo(n)
Protected r,i
For i=1 To n
r+i
Next
ProcedureReturn r.i
EndProcedure
; [1]
; array rsA(n)... string-lengths of the numbers
; in the bottom row
; [2]
; sumTo(i-1)+1 to sumTo(i)
; 11 12 13 14 15
; here k is the column-index for array rsA(k)
Procedure.s FloydsT... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #J | J | permutations=: A.~ i.@!@#
missingPerms=: -.~ permutations @ {. |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Lasso | Lasso | local(
year = integer(web_request -> param('year') || 2013),
date = date(#year + '-1-1'),
lastsu = array,
lastday
)
with month in generateseries(1,12) do {
#date -> day = 1
#date -> month = #month
#lastday = #date -> month(-days)
#date -> day = #lastday
loop(7) => {
if(#date -> dayofweek == 1) => {
#las... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Liberty_BASIC | Liberty BASIC |
yyyy=2013: if yyyy<1901 or yyyy>2099 then end
nda$="Lsu"
print "The last Sundays of "; yyyy
for mm=1 to 12
x=NthDayOfMonth(yyyy, mm, nda$)
select case mm
case 1: print " January "; x
case 2: print " February "; x
case 3: print " March "; x
case 4: print " Apr... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Sidef | Sidef | func det(a, b, c, d) { a*d - b*c }
func intersection(ax, ay, bx, by,
cx, cy, dx, dy) {
var detAB = det(ax,ay, bx,by)
var detCD = det(cx,cy, dx,dy)
var ΔxAB = (ax - bx)
var ΔyAB = (ay - by)
var ΔxCD = (cx - dx)
var ΔyCD = (cy - dy)
var x_numerator = det(detAB, ΔxAB, ... |
http://rosettacode.org/wiki/Find_the_intersection_of_a_line_with_a_plane | Find the intersection of a line with a plane | Finding the intersection of an infinite ray with a plane in 3D is an important topic in collision detection.
Task
Find the point of intersection for the infinite ray with direction (0, -1, -1) passing through position (0, 0, 10) with the infinite plane with a normal vector of (0, 0, 1) and which passes ... | #zkl | zkl | class Line { fcn init(pxyz, ray_xyz) { var pt=pxyz, ray=ray_xyz; } }
class Plane{ fcn init(pxyz, normal_xyz){ var pt=pxyz, normal=normal_xyz; } }
fcn dotP(a,b){ a.zipWith('*,b).sum(0.0); } # dot product --> x
fcn linePlaneIntersection(line,plane){
cos:=dotP(plane.normal,line.ray); # cosine between normal ... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #BASIC | BASIC | @echo off
for /L %%i in (1,1,100) do call :tester %%i
goto :eof
:tester
set /a test = %1 %% 15
if %test% NEQ 0 goto :NotFizzBuzz
echo FizzBuzz
goto :eof
:NotFizzBuzz
set /a test = %1 %% 5
if %test% NEQ 0 goto :NotBuzz
echo Buzz
goto :eof
:NotBuzz
set /a test = %1 %% 3
if %test% NEQ 0 goto :Not... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #MATLAB_.2F_Octave | MATLAB / Octave | longmonth = [1 3 5 7 8 10 12];
i = 1;
for y = 1900:2100
for m = 1:numel(longmonth)
[num,name] = weekday(datenum(y,longmonth(m),1));
if num == 6
x(i,:) = datestr(datenum(y,longmonth(m),1),'mmm yyyy'); %#ok<SAGROW>
i = i+1;
end
end
end
fprintf('There are %i mo... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #Oforth | Oforth | : compose(f, g) #[ g perform f perform ] ;
[ #cos, #sin, #[ 3 pow ] ] [ #acos, #asin, #[ 3 inv powf ] ] zipWith(#compose)
map(#[ 0.5 swap perform ]) conform(#[ 0.5 == ]) println
|
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #Ol | Ol |
; creation of new function from preexisting functions at run-time
(define (compose f g) (lambda (x) (f (g x))))
; storing functions in collection
(define (quad x) (* x x x x))
(define (quad-root x) (sqrt (sqrt x)))
(define collection (tuple quad quad-root))
; use functions as arguments to other functions
; and ... |
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #Tcl | Tcl | package require Tcl 8.5
# Build a grid
proc makeGrid {w h {treeProbability 0.5}} {
global grid gridW gridH
set gridW $w
set gridH $h
set grid [lrepeat $h [lrepeat $w " "]]
for {set x 0} {$x < $w} {incr x} {
for {set y 0} {$y < $h} {incr y} {
if {rand() < $treeProbability} {
lset grid $y $x... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #Joy | Joy |
"seqlib" libload.
[[1] 2 [[3 4] 5] [[[]]] [[[6]]] 7 8 []] treeflatten.
(* output: [1 2 3 4 5 6 7 8] *)
|
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Python | Python | >>> def floyd(rowcount=5):
rows = [[1]]
while len(rows) < rowcount:
n = rows[-1][-1] + 1
rows.append(list(range(n, n + len(rows[-1]) + 1)))
return rows
>>> floyd()
[[1], [2, 3], [4, 5, 6], [7, 8, 9, 10], [11, 12, 13, 14, 15]]
>>> def pfloyd(rows=[[1], [2, 3], [4, 5, 6], [7, 8, 9, 10]]):
colspace = [len(str(n)... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #Java | Java | import java.util.ArrayList;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
public class FindMissingPermutation {
public static void main(String[] args) {
Joiner joiner = Joiner.on("").skipNulls();
ImmutableSet<String> s = ImmutableSe... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #LiveCode | LiveCode | function lastDay yyyy, dayofweek
-- year,month num,day of month,hour in 24-hour time,minute,second,numeric day of week.
convert the long date to dateitems
put 1 into item 2 of it
put 1 into item 3 of it
put yyyy into item 1 of it
put it into startDate
convert startDate to dateItems
repea... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Lua | Lua | function isLeapYear (y)
return (y % 4 == 0 and y % 100 ~=0) or y % 400 == 0
end
function dayOfWeek (y, m, d)
local t = os.time({year = y, month = m, day = d})
return os.date("%A", t)
end
function lastWeekdays (wday, year)
local monthLength, day = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Swift | Swift | struct Point {
var x: Double
var y: Double
}
struct Line {
var p1: Point
var p2: Point
var slope: Double {
guard p1.x - p2.x != 0.0 else { return .nan }
return (p1.y-p2.y) / (p1.x-p2.x)
}
func intersection(of other: Line) -> Point? {
let ourSlope = slope
let theirSlope = other.slop... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #TI-83_BASIC | TI-83 BASIC | [[4,0][6,10][0,3][10,7]]→[A]
([A](2,2)-[A](1,2))/([A](2,1)-[A](1,1))→B
[A](1,2)-[A](1,1)*B→A
([A](4,2)-[A](3,2))/([A](4,1)-[A](3,1))→D
[A](3,2)-[A](3,1)*D→C
(C-A)/(B-D)→X
A+X*B→Y
C+X*D→Z
Disp {X,Y} |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #BASIC256 | BASIC256 | @echo off
for /L %%i in (1,1,100) do call :tester %%i
goto :eof
:tester
set /a test = %1 %% 15
if %test% NEQ 0 goto :NotFizzBuzz
echo FizzBuzz
goto :eof
:NotFizzBuzz
set /a test = %1 %% 5
if %test% NEQ 0 goto :NotBuzz
echo Buzz
goto :eof
:NotBuzz
set /a test = %1 %% 3
if %test% NEQ 0 goto :Not... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Maxima | Maxima | left(a, n) := makelist(a[i], i, 1, n)$
right(a, n) := block([m: length(a)], makelist(a[i], i, m - n + 1, m))$
a: [ ]$
for year from 1900 thru 2100 do
for month in [1, 3, 5, 7, 8, 10, 12] do
if weekday(year, month, 1) = 'friday then
a: endcons([year, month], a)$
length(a);
201
left(a, 5);
[[1901,... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #Oz | Oz | declare
fun {Compose F G}
fun {$ X}
{F {G X}}
end
end
fun {Cube X} {Number.pow X 3.0} end
fun {CubeRoot X} {Number.pow X 1.0/3.0} end
in
for
F in [Float.sin Float.cos Cube]
I in [Float.asin Float.acos CubeRoot]
do
{Show {{Compose I F} 0.5}}
end
|
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #uBasic.2F4tH | uBasic/4tH | B = 1 ' A burning tree
E = 16 ' An empty space
T = 256 ' A living tree
Input "%Chance a tree will burn: ";F ' Enter chance of combustion
Input "%Chance a tree will grow: ";P ' Enter chance of a new tree
Proc _CreateF... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #jq | jq | def flatten:
reduce .[] as $i
([];
if $i | type == "array" then . + ($i | flatten)
else . + [$i]
end); |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #q | q |
floyd:{n:1+ til sum 1+til x;
t:d:0;
while[1+x-:1;0N!(t+:1)#(d+:t)_n]}
floyd2:{n:1+ til sum 1+til x;
t:d:0;
while[1+x-:1;1 (" " sv string each (t+:1)#(d+:t)_n),"\n"]}
//The latter function 'floyd2' includes logic to remove the leading "," before "1" in the first row.
floyd[5]
floyd2... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #JavaScript | JavaScript | permute = function(v, m){ //v1.0
for(var p = -1, j, k, f, r, l = v.length, q = 1, i = l + 1; --i; q *= i);
for(x = [new Array(l), new Array(l), new Array(l), new Array(l)], j = q, k = l + 1, i = -1;
++i < l; x[2][i] = i, x[1][i] = x[0][i] = j /= --k);
for(r = new Array(q); ++p < q;)
for(r[p]... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Maple | Maple | sundays := proc(year)
local i, dt, change, last_days;
last_days := [31,28,31,30,31,30,31,31,30,31,30,31];
if (Calendar:-IsLeapYear(year)) then
last_days[2] := 28;
end if;
for i to 12 do
dt := Date(year, i, last_days[i]);
change := 0;
if not(Calendar:-DayOfWeek(dt) = 1) then
change := -Calendar:-DayOfWe... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Mathematica_.2F_Wolfram_Language | Mathematica / Wolfram Language | LastSundays[year_] :=
Table[Last@
DayRange[{year, i},
DatePlus[{year, i}, {{1, "Month"}, {-1, "Day"}}], Sunday], {i,
12}]
LastSundays[2013] |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Visual_Basic | Visual Basic | Option Explicit
Public Type Point
x As Double
y As Double
invalid As Boolean
End Type
Public Type Line
s As Point
e As Point
End Type
Public Function GetIntersectionPoint(L1 As Line, L2 As Line) As Point
Dim a1 As Double
Dim b1 As Double
Dim c1 As Double
Dim a2 As Double
Dim b2 As Double
Dim c2 As Doubl... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Visual_Basic_.NET | Visual Basic .NET | Imports System.Drawing
Module Module1
Function FindIntersection(s1 As PointF, e1 As PointF, s2 As PointF, e2 As PointF) As PointF
Dim a1 = e1.Y - s1.Y
Dim b1 = s1.X - e1.X
Dim c1 = a1 * s1.X + b1 * s1.Y
Dim a2 = e2.Y - s2.Y
Dim b2 = s2.X - e2.X
Dim c2 = a2 * s2.... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #Batch_File | Batch File | @echo off
for /L %%i in (1,1,100) do call :tester %%i
goto :eof
:tester
set /a test = %1 %% 15
if %test% NEQ 0 goto :NotFizzBuzz
echo FizzBuzz
goto :eof
:NotFizzBuzz
set /a test = %1 %% 5
if %test% NEQ 0 goto :NotBuzz
echo Buzz
goto :eof
:NotBuzz
set /a test = %1 %% 3
if %test% NEQ 0 goto :Not... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #MUMPS | MUMPS |
FIVE
;List and count the months between 1/1900 and 12/2100 that have 5 full weekends
;Extra credit - list and count years with no months with five full weekends
;Using the test that the 31st of a month is on a Sunday
;Uses the VA's public domain routine %DTC (Part of the Kernel) named here DIDTC
NEW YEAR,MONTH,X... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #NetRexx | NetRexx |
/* NetRexx ************************************************************
* 30.08.2012 Walter Pachl derived from Rexx version 3
* omitting dead code left there
**********************************************************************/
options replace format comments java crossref savelog symbols
Nu... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #PARI.2FGP | PARI/GP | compose(f,g)={
x -> f(g(x))
};
fcf()={
my(A,B);
A=[x->sin(x), x->cos(x), x->x^2];
B=[x->asin(x), x->acos(x), x->sqrt(x)];
for(i=1,#A,
print(compose(A[i],B[i])(.5))
)
}; |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #Perl | Perl | use Math::Complex ':trig';
sub compose {
my ($f, $g) = @_;
sub {
$f -> ($g -> (@_));
};
}
my $cube = sub { $_[0] ** (3) };
my $croot = sub { $_[0] ** (1/3) };
my @flist1 = ( \&Math::Complex::sin, \&Math::Complex::cos, $cube );
my @flist2 = ( \&asin, \&acos, $c... |
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #Vedit_macro_language | Vedit macro language | #1 = 25 // height of the grid
#2 = 60 // width of the grid
#3 = 2 // probability of random fire, per 1000
#4 = 40 // probability of new tree, per 1000
#5 = #2+2+Newline_Chars // total length of a line
#90 = Time_Tick // seed for random number ge... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #Jsish | Jsish | /* Flatten list, in Jsish */
function flatten(list) {
return list.reduce(function (acc, val) {
return acc.concat(typeof val === "array" ? flatten(val) : val);
}, []);
}
if (Interp.conf('unitTest')) {
; flatten([[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]);
}
/*
=!EXPECTSTART!=
flatten([[1], 2, [[3, 4]... |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Quackery | Quackery | [ dup 1+ * 2 / ] is triangulared ( n --> n )
[ number$ tuck size -
times sp echo$ ] is rightecho ( n n --> )
[ dup triangulared
number$ size 1+
0 rot times
[ i^ 1+ times
[ 1+ 2dup
rightecho ]
cr ]
2drop ] is floyd ( n -->... |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #R | R | Floyd <- function(n)
{
#The first argument of the seq call is a well-known formula for triangle numbers.
out <- t(sapply(seq_len(n), function(i) c(seq(to = 0.5 * (i * (i + 1)), by = 1, length.out = i), rep(NA, times = n - i))))
dimnames(out) <- list(rep("", times = nrow(out)), rep("", times = ncol(out)))
print(... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #jq | jq | jq -R . Find_the_missing_permutation.txt | jq -s -f Find_the_missing_permutation.jq
|
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Nim | Nim | import os, strutils, times
const
DaysInMonth: array[Month, int] = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
DayDiffs: array[WeekDay, int] = [1, 2, 3, 4, 5, 6, 0]
let year = paramStr(1).parseInt
for month in mJan..mDec:
var lastDay = DaysInMonth[month]
if month == mFeb and year.isLeapYear: lastDay ... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #OCaml | OCaml |
let is_leap_year y =
(* See OCaml solution on Rosetta Code for
determing if it's a leap year *)
if (y mod 100) = 0
then (y mod 400) = 0
else (y mod 4) = 0;;
let get_days y =
if is_leap_year y
then
[31;29;31;30;31;30;31;31;30;31;30;31]
else
[31;28;31;30;31;30;31;31;30;31;30;3... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #Wren | Wren | class Point {
construct new(x, y) {
_x = x
_y = y
}
x { _x }
y { _y }
toString { "(%(_x), %(_y))" }
}
class Line {
construct new(s, e) {
_s = s
_e = e
}
s { _s }
e { _e }
}
var findIntersection = Fn.new { |l1, l2|
var a1 = l1.e.y - l1.s.y... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #BBC_BASIC | BBC BASIC | for (i = 1; i <= 100; i++) {
w = 0
if (i % 3 == 0) { "Fizz"; w = 1; }
if (i % 5 == 0) { "Buzz"; w = 1; }
if (w == 0) i
if (w == 1) "
"
}
quit |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #NewLISP | NewLISP |
#!/usr/local/bin/newlisp
(context 'KR)
(define (Kraitchik year month day)
; See https://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week#Kraitchik.27s_variation
; Function adapted for specific task (not for general usage).
(if (or (= 1 month) (= 2 month))
(dec year)
)
;- ... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #Phix | Phix | sequence ctable = {}
function compose(integer f, g)
ctable = append(ctable,{f,g})
integer cdx = length(ctable)
return cdx
end function
function call_composite(integer cdx, atom x)
integer {f,g} = ctable[cdx]
return f(g(x))
end function
function plus1(atom x)
return x+1
end function
funct... |
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #Vlang | Vlang | import rand
import strings
import os
const (
rows = 20
cols = 30
p = .01
f = .001
)
const rx = rows + 2
const cx = cols + 2
fn main() {
mut odd := []string{len: rx*cx}
mut even := []string{len: rx*cx}
for r := 1; r <= rows; r++ {
for c := 1; c <= cols; c++ {
i... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #Julia | Julia | isflat(x) = isempty(x) || first(x) === x
function flat_mapreduce(arr)
mapreduce(vcat, arr, init=[]) do x
isflat(x) ? x : flat(x)
end
end |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Racket | Racket |
#lang racket
(require math)
(define (tri n)
(if (zero? n) 0 (triangle-number n)))
(define (floyd n)
(define (width x) (string-length (~a x)))
(define (~n x c) (~a x
#:width (width (+ (tri (- n 1)) 1 c))
#:align 'right #:left-pad-string " "))
(for ([r n])
... |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Raku | Raku | constant @floyd1 = (1..*).rotor(1..*);
constant @floyd2 = gather for 1..* -> $s { take [++$ xx $s] }
sub format-rows(@f) {
my @table;
my @formats = @f[@f-1].map: {"%{.chars}s"}
for @f -> @row {
@table.push: (@row Z @formats).map: -> ($i, $f) { $i.fmt($f) }
}
join "\n", @table;
}
say form... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #Julia | Julia | using BenchmarkTools, Combinatorics
function missingperm(arr::Vector)
allperms = String.(permutations(arr[1])) # revised for type safety
for perm in allperms
if perm ∉ arr return perm end
end
end
arr = ["ABCD", "CABD", "ACDB", "DACB", "BCDA", "ACBD", "ADCB", "CDAB", "DABC", "BCAD",
"CADB... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #K | K | split:{1_'(&x=y)_ x:y,x}
g: ("ABCD CABD ACDB DACB BCDA ACBD ADCB CDAB DABC BCAD CADB")
g,:(" CDBA CBAD ABDC ADBC BDCA DCBA BACD BADC BDAC CBDA DBCA DCAB")
p: split[g;" "];
/ All permutations of "ABCD"
perm:{:[1<x;,/(>:'(x,x)#1,x#0)[;0,'1+_f x-1];,!x]}
p2:a@(perm(#a:"ABCD"));
/ Which permut... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Oforth | Oforth | import: date
: lastSunday(y)
| m |
Date.JANUARY Date.DECEMBER for: m [
Date newDate(y, m, Date.DaysInMonth(y, m))
while(dup dayOfWeek Date.SUNDAY <>) [ addDays(-1) ] println
] ; |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #PARI.2FGP | PARI/GP | \\ Normalized Julian Day Number from date
njd(D) =
{
my (m = D[2], y = D[1]);
if (D[2] > 2, m++, y--; m += 13);
(1461 * y) \ 4 + (306001 * m) \ 10000 + D[3] - 694024 + 2 - y \ 100 + y \ 400
}
\\ Date from Normalized Julian Day Number
njdate(J) =
{
my (a = J + 2415019, b = (4 * a - 7468865) \ 146097, c, d, m, ... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #XPL0 | XPL0 | func real Det; real A0, B0, A1, B1;
return A0*B1 - A1*B0;
func Cramer; real A0, B0, C0, A1, B1, C1;
real Denom;
[Denom:= Det(A0, B0, A1, B1);
RlOut(0, Det(C0, B0, C1, B1) / Denom);
RlOut(0, Det(A0, C0, A1, C1) / Denom);
];
real L0, L1, M0, M1;
[L0:= [[ 4., 0.], [ 6., 10.]];
L1:= [[ 0., 3.], [10., 7.]];
M0:= (L0... |
http://rosettacode.org/wiki/Find_the_intersection_of_two_lines | Find the intersection of two lines | [1]
Task
Find the point of intersection of two lines in 2D.
The 1st line passes though (4,0) and (6,10) .
The 2nd line passes though (0,3) and (10,7) .
| #zkl | zkl | fcn lineIntersect(ax,ay, bx,by, cx,cy, dx,dy){ // --> (x,y)
detAB,detCD := det(ax,ay, bx,by), det(cx,cy, dx,dy);
abDx,cdDx := ax - bx, cx - dx; // delta x
abDy,cdDy := ay - by, cy - dy; // delta y
xnom,ynom := det(detAB,abDx, detCD,cdDx), det(detAB,abDy, detCD,cdDy);
denom := det(abDx,abDy, cdDx,... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #bc | bc | for (i = 1; i <= 100; i++) {
w = 0
if (i % 3 == 0) { "Fizz"; w = 1; }
if (i % 5 == 0) { "Buzz"; w = 1; }
if (w == 0) i
if (w == 1) "
"
}
quit |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Nim | Nim | import times
const LongMonths = {mJan, mMar, mMay, mJul, mAug, mOct, mDec}
var sumNone = 0
for year in 1900..2100:
var none = true
for month in LongMonths:
if initDateTime(1, month, year, 0, 0, 0).weekday == dFri:
echo month, " ", year
none = false
if none: inc sumNone
echo "\nYears without ... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #OCaml | OCaml | open CalendarLib
let list_first_five = function
| x1 :: x2 :: x3 :: x4 :: x5 :: _ -> [x1; x2; x3; x4; x5]
| _ -> invalid_arg "list_first_five"
let () =
let months = ref [] in
for year = 1900 to 2100 do
for month = 1 to 12 do
let we = ref 0 in
let num_days = Date.days_in_month (Date.make_year... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #PHP | PHP | $compose = function ($f, $g) {
return function ($x) use ($f, $g) {
return $f($g($x));
};
};
$fn = array('sin', 'cos', function ($x) { return pow($x, 3); });
$inv = array('asin', 'acos', function ($x) { return pow($x, 1/3); });
for ($i = 0; $i < 3; $i++) {
$f = $compose($inv[$i], $fn[$i]);
e... |
http://rosettacode.org/wiki/Forest_fire | Forest fire |
This page uses content from Wikipedia. The original article was at Forest-fire model. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance)
Task
Implement the Drossel and Schwabl definition of the fores... | #Wren | Wren | import "random" for Random
import "io" for Stdin
var rand = Random.new()
var rows = 20
var cols = 30
var p = 0.01
var f = 0.001
var rx = rows + 2
var cx = cols + 2
var step = Fn.new { |dst, src|
for (r in 1..rows) {
for (c in 1..cols) {
var x = r*cx + c
dst[x] = src[x]
... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #K | K | ,//((1); 2; ((3;4); 5); ((())); (((6))); 7; 8; ()) |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #REXX | REXX |
/* REXX ***************************************************************
* Parse Arg rowcount
* 12.07.2012 Walter Pachl - translated from Python
**********************************************************************/
Parse Arg rowcount ... |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #Kotlin | Kotlin | // version 1.1.2
fun <T> permute(input: List<T>): List<List<T>> {
if (input.size == 1) return listOf(input)
val perms = mutableListOf<List<T>>()
val toInsert = input[0]
for (perm in permute(input.drop(1))) {
for (i in 0..perm.size) {
val newPerm = perm.toMutableList()
n... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Perl | Perl | #!/usr/bin/perl
use strict ;
use warnings ;
use DateTime ;
for my $i( 1..12 ) {
my $date = DateTime->last_day_of_month( year => $ARGV[ 0 ] ,
month => $i ) ;
while ( $date->dow != 7 ) {
$date = $date->subtract( days => 1 ) ;
}
my $ymd = $date->ymd ;
print "$ymd\n" ;
} |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #BCPL | BCPL | GET "libhdr"
LET start() BE $(
FOR i=1 TO 100 DO $(
TEST (i REM 15) = 0 THEN
writes("FizzBuzz")
ELSE TEST (i REM 3) = 0 THEN
writes("Fizz")
ELSE TEST (i REM 5) = 0 THEN
writes("Buzz")
ELSE
writen(i, 0)
newline()
$)
$... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Oforth | Oforth | : fiveWeekEnd(y1, y2)
| y m |
ListBuffer new
y1 y2 for: y [
Date.JANUARY Date.DECEMBER for: m [
Date.DaysInMonth(y, m) 31 ==
[ y, m, 01 ] asDate dayOfWeek Date.FRIDAY == and
ifTrue: [ [ y, m ] over add ]
]
]
dup size println dup left(5) println right(5) pri... |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #PARI.2FGP | PARI/GP | fiveWeekends()={
my(day=6); \\ 0 = Friday; this represents Thursday for March 1, 1900.
my(ny=[31,30,31,30,31,31,30,31,30,31,31,28],ly=ny,v,s);
ly[12]=29;
for(year=1900,2100,
v=if((year+1)%4,ny,ly); \\ Works for 1600 to 2398
for(month=1,12,
if(v[month] == 31 && !day,
if(month<11,
print(year" "month+2... |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #PicoLisp | PicoLisp | (load "@lib/math.l")
(de compose (F G)
(curry (F G) (X)
(F (G X)) ) )
(de cube (X)
(pow X 3.0) )
(de cubeRoot (X)
(pow X 0.3333333) )
(mapc
'((Fun Inv)
(prinl (format ((compose Inv Fun) 0.5) *Scl)) )
'(sin cos cube)
'(asin acos cubeRoot) ) |
http://rosettacode.org/wiki/First-class_functions | First-class functions | A language has first-class functions if it can do each of the following without recursively invoking a compiler or interpreter or otherwise metaprogramming:
Create new functions from preexisting functions at run-time
Store functions in collections
Use functions as arguments to other functions
Use functions as retu... | #PostScript | PostScript |
% PostScript has 'sin' and 'cos', but not these
/asin { dup dup 1. add exch 1. exch sub mul sqrt atan } def
/acos { dup dup 1. add exch 1. exch sub mul sqrt exch atan } def
/cube { 3 exp } def
/cuberoot { 1. 3. div exp } def
/compose { % f g -> { g f }
[ 3 1 roll exch
% procedures are not executed when encoun... |
http://rosettacode.org/wiki/Flatten_a_list | Flatten a list | Task
Write a function to flatten the nesting in an arbitrary list of values.
Your program should work on the equivalent of this list:
[[1], 2, [[3, 4], 5], [[[]]], [[[6]]], 7, 8, []]
Where the correct result would be the list:
[1, 2, 3, 4, 5, 6, 7, 8]
Related task
Tree traversal
| #Kotlin | Kotlin | // version 1.0.6
@Suppress("UNCHECKED_CAST")
fun flattenList(nestList: List<Any>, flatList: MutableList<Int>) {
for (e in nestList)
if (e is Int)
flatList.add(e)
else
// using unchecked cast here as can't check for instance of 'erased' generic type
flattenList... |
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Ring | Ring |
rows = 10
n = 0
for r = 1 to rows
for c = 1 to r
n = n + 1
see string(n) + " "
next
see nl
next
|
http://rosettacode.org/wiki/Floyd%27s_triangle | Floyd's triangle | Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
the first row is 1 (unity)
successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.
The first few lines of a Floyd triangle looks like thi... | #Ruby | Ruby | def floyd(rows)
max = (rows * (rows + 1)) / 2
widths = ((max - rows + 1)..max).map {|n| n.to_s.length + 1}
n = 0
rows.times do |r|
puts (0..r).map {|i| n += 1; "%#{widths[i]}d" % n}.join
end
end
floyd(5)
floyd(14) |
http://rosettacode.org/wiki/Find_the_missing_permutation | Find the missing permutation | ABCD
CABD
ACDB
DACB
BCDA
ACBD
ADCB
CDAB
DABC
BCAD
CADB
CDBA
... | #Lua | Lua | local permute, tablex = require("pl.permute"), require("pl.tablex")
local permList, pStr = {
"ABCD", "CABD", "ACDB", "DACB", "BCDA", "ACBD", "ADCB", "CDAB",
"DABC", "BCAD", "CADB", "CDBA", "CBAD", "ABDC", "ADBC", "BDCA",
"DCBA", "BACD", "BADC", "BDAC", "CBDA", "DBCA", "DCAB"
}
for perm in permute.iter({"A",... |
http://rosettacode.org/wiki/Find_the_last_Sunday_of_each_month | Find the last Sunday of each month | Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).
Example of an expected output:
./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2... | #Phix | Phix | include timedate.e
constant SUNDAY=7
procedure showlast(integer dow, integer doy, timedate td)
td = adjust_timedate(td,timedelta(days:=doy-1))
integer {year,month,day} = td
while day_of_week(year,month,day)!=dow do day-=1 end while
printf(1,"%4d-%02d-%02d\n",{year,month,day})
end procedure
procedu... |
http://rosettacode.org/wiki/FizzBuzz | FizzBuzz | Task
Write a program that prints the integers from 1 to 100 (inclusive).
But:
for multiples of three, print Fizz (instead of the number)
for multiples of five, print Buzz (instead of the number)
for multiples of both three and five, print FizzBuzz (instead of the number)
... | #beeswax | beeswax | > q
>@F5~%"d@F{ > @F q
_1>F3~%'d`Fizz`@F5~%'d >`Buzz`@FNp
;bL@~.~4~.5~5@ P< |
http://rosettacode.org/wiki/Five_weekends | Five weekends | The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
Task
Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
Show the number of months with this property (there should be 201).
Show at leas... | #Pascal | Pascal | #!/usr/bin/perl -w
use DateTime ;
my @happymonths ;
my @workhardyears ;
my @longmonths = ( 1 , 3 , 5 , 7 , 8 , 10 , 12 ) ;
my @years = 1900..2100 ;
foreach my $year ( @years ) {
my $countmonths = 0 ;
foreach my $month ( @longmonths ) {
my $dt = DateTime->new( year => $year ,
month =... |
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