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Java and multiple inheritance	Java does not support multiple inheritance. This means that a class cannot extend more than one class. Therefore, following is illegal public class extends Animal, Mammal{} However, a class can implement one or more interfaces, which has helped Java get rid of the impossibility of multiple inheritance. The extends keyw...	[ { "code": null, "e": 1197, "s": 1062, "text": "Java does not support multiple inheritance. This means that a class cannot extend more than one class. Therefore, following is illegal" }, { "code": null, "e": 1235, "s": 1197, "text": "public class extends Animal, Mammal{}" }, {...
How to Set-Up Shiny Server on Ubuntu	Shiny is an R package that allows Linux users to convert R code into an interactive webpage and documents online. You can take your shiny apps and share them in your organisation or the world. This article explains about how to set up shiny server on Ubuntu. Before installing Shiny server, we need to install the shiny ...	[ { "code": null, "e": 1321, "s": 1062, "text": "Shiny is an R package that allows Linux users to convert R code into an interactive webpage and documents online. You can take your shiny apps and share them in your organisation or the world. This article explains about how to set up shiny server on Ub...
Datagrams in Java - GeeksforGeeks	24 May, 2018 TCP/IP-style networking provides a serialized, predictable, reliable stream of packet data. This is not without its cost, however. TCP includes algorithms for dealing with congestion control on crowded networks, as well as pessimistic expectations about packet loss. This leads to inefficient way to transpo...	[ { "code": null, "e": 23948, "s": 23920, "text": "\n24 May, 2018" }, { "code": null, "e": 24931, "s": 23948, "text": "TCP/IP-style networking provides a serialized, predictable, reliable stream of packet data. This is not without its cost, however. TCP includes algorithms for deal...
HTML Course \| Building Main Content - Section 1 - GeeksforGeeks	10 Aug, 2021 Course Navigation We just completed building the header for our website. Let’s start building the main content for the website. As we described while creating the HTML layout of the website, the main content was divided into three sections as shown below: HTML <!-- Main content between Header and Foote...	[ { "code": null, "e": 30298, "s": 30270, "text": "\n10 Aug, 2021" }, { "code": null, "e": 30318, "s": 30298, "text": "Course Navigation " }, { "code": null, "e": 30558, "s": 30318, "text": "We just completed building the header for our website. Let’s start bui...
Count substrings that starts with character X and ends with character Y - GeeksforGeeks	28 Apr, 2021 Given a string str of n lowercase characters, the task is to count the number of substrings of str starting with character X and ending with character Y.Examples: Input: str = "abbcaceghcak" x = 'a', y = 'c' Output: 5 abbc, abbcac, ac, abbcaceghc, aceghc Input: str = "geeksforgeeks" x = ...	[ { "code": null, "e": 24854, "s": 24826, "text": "\n28 Apr, 2021" }, { "code": null, "e": 25019, "s": 24854, "text": "Given a string str of n lowercase characters, the task is to count the number of substrings of str starting with character X and ending with character Y.Examples: ...
How to Create a Drop-Down Menu and a Slide Bar for your Favorite Visualization Tool \| by Khuyen Tran \| Towards Data Science	Imagine we are analyzing the trend population of countries in the world from 1960 to 2018 to predict the population in the next coming years. To visualize the trend of the country, we choose Plotly for its simple and beautiful visualization. Start with ‘Vietnam’ import pandas as pd import datapane as dp import plotly.e...	[ { "code": null, "e": 313, "s": 171, "text": "Imagine we are analyzing the trend population of countries in the world from 1960 to 2018 to predict the population in the next coming years." }, { "code": null, "e": 434, "s": 313, "text": "To visualize the trend of the country, we ch...
Missing number in matrix \| Practice \| GeeksforGeeks	Given a matrix of size n x n such that it has only one 0, Find the number to be placed in place of the 0 such that sum of the numbers in every row, column and two diagonals become equal. Note: Diagonals should be only of the form matrix[i][i] and matrix[i][n - i - 1]. Example 1: Input: matrix = {{5, 5}, {5, 0}} Outp...	[ { "code": null, "e": 414, "s": 226, "text": "Given a matrix of size n x n such that it has only one 0, Find the number to be placed in place of the 0 such that sum of the numbers in every row, column and two diagonals become equal. " }, { "code": null, "e": 498, "s": 414, "text":...
Get the top most document from a MongoDB collection	To get the topmost document, use find() along with limit(). To fetch only a single document, consider using limit(1). Let us create a collection with documents − > db.demo681.insertOne({_id:101,Name:"Chris"}); { "acknowledged" : true, "insertedId" : 101 } > db.demo681.insertOne({_id:102,Name:"Bob"}); { "acknowledged" :...	[ { "code": null, "e": 1224, "s": 1062, "text": "To get the topmost document, use find() along with limit(). To fetch only a single document, consider using limit(1). Let us create a collection with documents −" }, { "code": null, "e": 1688, "s": 1224, "text": "> db.demo681.insertO...
Collect.js partition() Method - GeeksforGeeks	30 Nov, 2020 The partition() method is used to separate the collection elements according to the given callback function. The first array containing those elements that satisfy the predicate (condition) and the second array contains the remaining elements. Syntax: collect(array).partition(callback) Parameters: The coll...	[ { "code": null, "e": 25220, "s": 25192, "text": "\n30 Nov, 2020" }, { "code": null, "e": 25464, "s": 25220, "text": "The partition() method is used to separate the collection elements according to the given callback function. The first array containing those elements that satisfy...
Fitting a Neural Network Using Randomized Optimization in Python \| by Genevieve Hayes \| Towards Data Science	Python’s mlrose package provides functionality for implementing some of the most popular randomization and search algorithms, and applying them to a range of different optimization problem domains. In this tutorial, we will discuss how mlrose can be used to find the optimal weights for machine learning models, such as ...	[ { "code": null, "e": 370, "s": 172, "text": "Python’s mlrose package provides functionality for implementing some of the most popular randomization and search algorithms, and applying them to a range of different optimization problem domains." }, { "code": null, "e": 599, "s": 370, ...
C++ Program to compare two string using pointers - GeeksforGeeks	04 Nov, 2018 Given two strings, compare the strings using pointers Examples: Input: str1 = geeks, str2 = geeks Output: Both are equal Input: str1 = hello, str2 = hellu Output: Both are not equal As their length are same but characters are different The idea is to dereference given pointers, compare values and advance ...	[ { "code": null, "e": 24448, "s": 24420, "text": "\n04 Nov, 2018" }, { "code": null, "e": 24502, "s": 24448, "text": "Given two strings, compare the strings using pointers" }, { "code": null, "e": 24512, "s": 24502, "text": "Examples:" }, { "code": null...
MySQL IN Operator	The IN operator allows you to specify multiple values in a WHERE clause. The IN operator is a shorthand for multiple OR conditions. or: The table below shows the complete "Customers" table from the Northwind sample database: The following SQL statement selects all customers that are located in "Germany", "France" or...	[ { "code": null, "e": 74, "s": 0, "text": "The IN operator allows you to specify multiple values in a \nWHERE clause." }, { "code": null, "e": 134, "s": 74, "text": "The IN operator is a shorthand for multiple \nOR conditions." }, { "code": null, "e": 138, "s": 134...
Convert Infix to Postfix Expression	Infix expressions are readable and solvable by humans. We can easily distinguish the order of operators, and also can use the parenthesis to solve that part first during solving mathematical expressions. The computer cannot differentiate the operators and parenthesis easily, that’s why postfix conversion is needed. To ...	[ { "code": null, "e": 1379, "s": 1062, "text": "Infix expressions are readable and solvable by humans. We can easily distinguish the order of operators, and also can use the parenthesis to solve that part first during solving mathematical expressions. The computer cannot differentiate the operators a...
FROM_UNIXTIME() function in MySQL - GeeksforGeeks	22 Dec, 2020 FROM_UNIXTIME() :This function in MySQL helps to return date /DateTime representation of a Unix timestamp. The format of returning value will be ‘YYYY-MM-DD HH:MM:SS’ or ‘YYYYMMDDHHMMSS’, depending on the context of the function. Syntax : FROM_UNIXTIME(unix_timestamp, format) Parameters :The function can a...	[ { "code": null, "e": 24268, "s": 24240, "text": "\n22 Dec, 2020" }, { "code": null, "e": 24498, "s": 24268, "text": "FROM_UNIXTIME() :This function in MySQL helps to return date /DateTime representation of a Unix timestamp. The format of returning value will be ‘YYYY-MM-DD HH:MM:...
Exploratory Data Analysis: A Practical Guide and Template for Structured Data \| by Jiahao Weng \| Towards Data Science	Very often, it is not the drawing that is most difficult, but rather what to draw on a blank white piece of paper that stumps people. Similarly for data science, one may wonder how to get started after receiving a dataset. This is where Exploratory Data Analysis (EDA) comes to the rescue. According to Wikipedia, EDA “i...	[ { "code": null, "e": 306, "s": 172, "text": "Very often, it is not the drawing that is most difficult, but rather what to draw on a blank white piece of paper that stumps people." }, { "code": null, "e": 462, "s": 306, "text": "Similarly for data science, one may wonder how to ge...
Count of subarrays having sum equal to its length - GeeksforGeeks	18 May, 2021 Given an array arr[] of size N, the task is to find the number of subarrays having the sum of its elements equal to the number of elements in it. Examples: Input: N = 3, arr[] = {1, 0, 2}Output: 3Explanation:Total number of subarrays are 6 i.e., {1}, {0}, {2}, {1, 0}, {0, 2}, {1, 0, 2}.Out of 6 only three ...	[ { "code": null, "e": 25438, "s": 25410, "text": "\n18 May, 2021" }, { "code": null, "e": 25584, "s": 25438, "text": "Given an array arr[] of size N, the task is to find the number of subarrays having the sum of its elements equal to the number of elements in it." }, { "co...
How to click on image in selenium webdriver Python?	We can click on an image with Selenium webdriver in Python using the method click. First of all, we have to identify the image with the help of any of the locators like id, class, name, css, xpath, and so on. An image in the html code is represented by the img tagname. Let us see the html code of an image element. impo...	[ { "code": null, "e": 1332, "s": 1062, "text": "We can click on an image with Selenium webdriver in Python using the method click. First of all, we have to identify the image with the help of any of the locators like id, class, name, css, xpath, and so on. An image in the html code is represented by ...
Tryit Editor v3.7	HTML file paths Tryit: relative url	[ { "code": null, "e": 26, "s": 10, "text": "HTML file paths" } ]
Data Scientists, The 5 Graph Algorithms that you should know \| by Rahul Agarwal \| Towards Data Science	We as data scientists have gotten quite comfortable with Pandas or SQL or any other relational database. We are used to seeing our users in rows with their attributes as columns. But does the real world really behave like that? In a connected world, users cannot be considered as independent entities. They have got cert...	[ { "code": null, "e": 277, "s": 172, "text": "We as data scientists have gotten quite comfortable with Pandas or SQL or any other relational database." }, { "code": null, "e": 400, "s": 277, "text": "We are used to seeing our users in rows with their attributes as columns. But doe...
How to Create a Strip Chart in R? - GeeksforGeeks	14 Feb, 2022 In this article, we will be throwing light on the various methodologies to create a strip chart using various functions and its arguments in the R programming language. In this approach to create a strip chart of the numeric vector, the user needs to simply call the stripchart() function which is an inbuil...	[ { "code": null, "e": 24851, "s": 24823, "text": "\n14 Feb, 2022" }, { "code": null, "e": 25020, "s": 24851, "text": "In this article, we will be throwing light on the various methodologies to create a strip chart using various functions and its arguments in the R programming lang...
Manacher’s Algorithm	To find the longest palindromic substring from a string, we can use Manacher’s Algorithm. By selecting each character, we will try to find if there any palindrome using left and right pointer. There is another array to store information, from that information we can easily find how long the palindrome is. For each char...	[ { "code": null, "e": 1530, "s": 1062, "text": "To find the longest palindromic substring from a string, we can use Manacher’s Algorithm. By selecting each character, we will try to find if there any palindrome using left and right pointer. There is another array to store information, from that infor...
How to change the app language programmatically in android?	This example demonstrates how do I in change the app language programmatically android. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main.xml. <?xml version="1.0" encoding="utf-8"?>...	[ { "code": null, "e": 1150, "s": 1062, "text": "This example demonstrates how do I in change the app language programmatically android." }, { "code": null, "e": 1279, "s": 1150, "text": "Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all require...
Python \| Extract unique tuples from list, Order Irrespective - GeeksforGeeks	11 Nov, 2019 Sometimes, while working with data, we can have a problem in which we need to check for similar records and eradicate them. When elements are ordered, this case has been discussed before. But sometimes, we might have to ignore the order and has to be removed in case similar elements occur. Let’s discuss ce...	[ { "code": null, "e": 24513, "s": 24485, "text": "\n11 Nov, 2019" }, { "code": null, "e": 24868, "s": 24513, "text": "Sometimes, while working with data, we can have a problem in which we need to check for similar records and eradicate them. When elements are ordered, this case ha...
\dagger - Tex Command	\dagger - Used to draw dagger symbol. { \dagger } \dagger command draws dagger symbol. \dagger † \dagger † \dagger 14 Lectures 52 mins Ashraf Said 11 Lectures 1 hours Ashraf Said 9 Lectures 1 hours Emenwa Global, Ejike IfeanyiChukwu 29 Lectures 2.5 hours Mo...	[ { "code": null, "e": 8024, "s": 7986, "text": "\\dagger - Used to draw dagger symbol." }, { "code": null, "e": 8036, "s": 8024, "text": "{ \\dagger }" }, { "code": null, "e": 8073, "s": 8036, "text": "\\dagger command draws dagger symbol." }, { "code":...
Serialization and Deserialization in Java with Example - GeeksforGeeks	07 Oct, 2021 Serialization is a mechanism of converting the state of an object into a byte stream. Deserialization is the reverse process where the byte stream is used to recreate the actual Java object in memory. This mechanism is used to persist the object. The byte stream created is platform independent. So, the obj...	[ { "code": null, "e": 22941, "s": 22913, "text": "\n07 Oct, 2021" }, { "code": null, "e": 23188, "s": 22941, "text": "Serialization is a mechanism of converting the state of an object into a byte stream. Deserialization is the reverse process where the byte stream is used to recre...
Another Stage Of Visualization: Be Reactive with Dash \| by Jiwon Jeong \| Towards Data Science	Dash is an open source python library which enables us to create web applications with Plotly. It makes it easy to build an interactive visualization with simple reactive decorators like a dropdown, a slider bar, and markdown text data. We can even update the plots according to the input data with callbacks, and all th...	[ { "code": null, "e": 736, "s": 171, "text": "Dash is an open source python library which enables us to create web applications with Plotly. It makes it easy to build an interactive visualization with simple reactive decorators like a dropdown, a slider bar, and markdown text data. We can even update...
Stop and Wait protocol, its problems and solutions - GeeksforGeeks	08 Jun, 2021 It is the simplest flow control method in which the sender will send the packet and then wait for the acknowledgement by the receiver that it has received the packet then it will send the next packet. Stop and wait protocol is very easy to implement. Total time taken to send is, Ttotal = Tt(data) + T...	[ { "code": null, "e": 24236, "s": 24208, "text": "\n08 Jun, 2021" }, { "code": null, "e": 24438, "s": 24236, "text": "It is the simplest flow control method in which the sender will send the packet and then wait for the acknowledgement by the receiver that it has received the pack...
Get the date/time of the last change to a MySQL database?	You can get the date/time of the last change to a MySQL database with the help of INFORMATION_SCHEMA.TABLES. The syntax is as follows − SELECT update_time FROM information_schema.tables WHERE table_schema = 'yourDatabaseName’' AND table_name = 'yourTableName’; To understand the above syntax, let us create a table. The ...	[ { "code": null, "e": 1198, "s": 1062, "text": "You can get the date/time of the last change to a MySQL database with the help of INFORMATION_SCHEMA.TABLES. The syntax is as follows −" }, { "code": null, "e": 1323, "s": 1198, "text": "SELECT update_time\nFROM information_schema.ta...
LISP - Error Handling	In Common LISP terminology, exceptions are called conditions. In fact, conditions are more general than exceptions in traditional programming languages, because a condition represents any occurrence, error, or not, which might affect various levels of function call stack. Condition handling mechanism in LISP, handles s...	[ { "code": null, "e": 2122, "s": 2060, "text": "In Common LISP terminology, exceptions are called conditions." }, { "code": null, "e": 2333, "s": 2122, "text": "In fact, conditions are more general than exceptions in traditional programming languages, because a condition represent...
How to Use Group By and Partition By in SQL \| by Chi Nguyen \| Towards Data Science	When I first learned SQL, I had a problem of differentiating between PARTITION BY and GROUP BY, as they both have a function for grouping. I believe many people who begin to work with SQL may encounter the same problem. Therefore, in this article I want to share with you some examples of using PARTITION BY, and the dif...	[ { "code": null, "e": 546, "s": 171, "text": "When I first learned SQL, I had a problem of differentiating between PARTITION BY and GROUP BY, as they both have a function for grouping. I believe many people who begin to work with SQL may encounter the same problem. Therefore, in this article I want t...
Delete Node in a BST in C++	Suppose we have a binary search tree. We will take one key k, and we have to delete the given key k from the BST, and return the updated BST. So if the tree is like − And the key k = 3, then the output tree will be − To solve this, we will follow these steps − Define a method called deleteRoot() to delete the root node...	[ { "code": null, "e": 1229, "s": 1062, "text": "Suppose we have a binary search tree. We will take one key k, and we have to delete the given key k from the BST, and return the updated BST. So if the tree is like −" }, { "code": null, "e": 1279, "s": 1229, "text": "And the key k =...
Memoization using decorators in Python	25 May, 2022 Recursion is a programming technique where a function calls itself repeatedly till a termination condition is met. Some of the examples where recursion is used are calculation of fibonacci series, factorial, etc. But the issue with them is that in the recursion tree, there can be chances that the sub-probl...	[ { "code": null, "e": 54, "s": 26, "text": "\n25 May, 2022" }, { "code": null, "e": 841, "s": 54, "text": "Recursion is a programming technique where a function calls itself repeatedly till a termination condition is met. Some of the examples where recursion is used are calculatio...
How to declare a pointer to a function?	28 May, 2017 Well, we assume that you know what does it mean by pointer in C. So how do we create a pointer to an integer in C?Huh..it is pretty simple.. int * ptrInteger; /We have put a operator between int and ptrInteger to create a pointer.*/ Here ptrInteger is a pointer to integer. If you u...	[ { "code": null, "e": 52, "s": 24, "text": "\n28 May, 2017" }, { "code": null, "e": 193, "s": 52, "text": "Well, we assume that you know what does it mean by pointer in C. So how do we create a pointer to an integer in C?Huh..it is pretty simple.." }, { "code": null, "...
Write custom aggregation function in Pandas	20 Aug, 2020 Pandas in python in widely used for Data Analysis purpose and it consists of some fine data structures like Dataframe and Series. There are several functions in pandas that proves to be a great help for a programmer one of them is an aggregate function. This function returns a single value from multiple va...	[ { "code": null, "e": 28, "s": 0, "text": "\n20 Aug, 2020" }, { "code": null, "e": 479, "s": 28, "text": "Pandas in python in widely used for Data Analysis purpose and it consists of some fine data structures like Dataframe and Series. There are several functions in pandas that pr...
How to get the MAC and IP address of a connected client in PHP?	23 Feb, 2022 What is a MAC address?MAC is the abbreviation of “Media Access Control” and it is a 48-bit physical address associated with every networking device. It is printed on the NIC(Network Interface Card) and is globally unique for every networking device. MAC address is used by the data-link layer to route a dat...	[ { "code": null, "e": 52, "s": 24, "text": "\n23 Feb, 2022" }, { "code": null, "e": 396, "s": 52, "text": "What is a MAC address?MAC is the abbreviation of “Media Access Control” and it is a 48-bit physical address associated with every networking device. It is printed on the NIC(...
Find a Mother Vertex in a Graph	30 Jun, 2022 What is a Mother Vertex? A mother vertex in a graph G = (V, E) is a vertex v such that all other vertices in G can be reached by a path from v. Example: Input : Below Graph Output : 5 There can be more than one mother vertices in a graph. We need to output anyone of them. For example, in the below graph,...	[ { "code": null, "e": 54, "s": 26, "text": "\n30 Jun, 2022" }, { "code": null, "e": 198, "s": 54, "text": "What is a Mother Vertex? A mother vertex in a graph G = (V, E) is a vertex v such that all other vertices in G can be reached by a path from v." }, { "code": null, ...
ProgressBar in Kotlin	01 Sep, 2021 Android ProgressBar is a user interface control that indicates the progress of an operation. For example, downloading a file, uploading a file on the internet we can see the progress bar to estimate the time remaining in operation. There are two modes of ProgressBar: Determinate ProgressBar Indeterminate ...	[ { "code": null, "e": 28, "s": 0, "text": "\n01 Sep, 2021" }, { "code": null, "e": 297, "s": 28, "text": "Android ProgressBar is a user interface control that indicates the progress of an operation. For example, downloading a file, uploading a file on the internet we can see the p...
Random Number Generator in Solidity using keccak256	11 May, 2022 Random numbers are numbers that occur in a sequence with the following two mandatory conditions: The values are uniformly distributed over a set interval.One cannot predict future values based on past outputs. The values are uniformly distributed over a set interval. One cannot predict future values based ...	[ { "code": null, "e": 54, "s": 26, "text": "\n11 May, 2022" }, { "code": null, "e": 151, "s": 54, "text": "Random numbers are numbers that occur in a sequence with the following two mandatory conditions:" }, { "code": null, "e": 264, "s": 151, "text": "The valu...
PyQtGraph – Setting Horizontal Range of Plot Window	13 Sep, 2021 In this article we will see how we can set the horizontal range of the plot window in the PyQtGraph module. PyQtGraph is a graphics and user interface library for Python that provides functionality commonly required in designing and science applications. Its primary goals are to provide fast, interactive g...	[ { "code": null, "e": 28, "s": 0, "text": "\n13 Sep, 2021" }, { "code": null, "e": 943, "s": 28, "text": "In this article we will see how we can set the horizontal range of the plot window in the PyQtGraph module. PyQtGraph is a graphics and user interface library for Python that ...
Python Pandas - Finding the uncommon rows between two DataFrames	To find the uncommon rows between two DataFrames, use the concat() method. Let us first import the required library with alias − import pandas as pd Create DataFrame1 with two columns − dataFrame1 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'], "Reg_Price": [1000, 1500, 1...	[ { "code": null, "e": 1316, "s": 1187, "text": "To find the uncommon rows between two DataFrames, use the concat() method. Let us first import the required library with alias −" }, { "code": null, "e": 1336, "s": 1316, "text": "import pandas as pd" }, { "code": null, "...