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7,800 | that will discuss matthew rocklin' multipledispatch as the best current implementation of the concept it implements most third-party libraries around functional programming are collections of higher-order functionsand sometimes enhancements to the tools for working lazily with iterators contained in itertools some nota... |
7,801 | domain articles this author wrote in the son which portions of this report are based these includethe first of my book text processing in pythonwhich discusses functional programming for text processingin the section titled "utilizing higher-order functions in text processing also wrote several articlesmentioned by kuc... |
7,802 | in typical imperative python programs--including those that make use of classes and methods to hold their imperative code-- block of code generally consists of some outside loops (for or while)assignment of state variables within those loopsmodification of data structures like dictslistsand sets (or various other struc... |
7,803 | collection get_initial_state(state_var none for datum in data_setif condition(state_var)state_var calculate_from(datumnew modify(datumstate_varcollection add_to(newelsenew modify_differently(datumcollection add_to(newnow actually work with the data for thing in collectionprocess(thingwe might simply remove the "howof t... |
7,804 | sion can often make surprisingly large difference in how we reason about code and how easy it is to understand the ternary operator also performs similar restructuring of our focususing the same keywords in different order for exampleif our original code wascollection list(for datum in data_setif condition(datum)collec... |
7,805 | listbut runtime behavior is nicer obviouslythis generator comprehension also has imperative versionsfor exampledef get_log_lines(log_file)line read_line(log_filewhile truetryif complex_condition(line)yield line line read_line(log_fileexcept stopiterationraise log_lines get_log_lines(huge_log_fileyesthe imperative versi... |
7,806 | rather than by repeatedly calling update(or add(in loop for example{ :chr( +ifor in range( ){ ' ' ' ' ' ' ' ' ' ' ' '{chr( +ifor in range( ){' '' '' '' '' '' 'the imperative versions of these comprehensions would look very similar to the examples shown earlier for other built-in datatypes recursion functional programme... |
7,807 | that simply repeatedly modified the total state variable would be more readableand moreover this function is perfectly reasonable to want to call against sequences of much larger length than howeverin other casesrecursive styleeven over sequential operationsstill expresses algorithms more intuitively and in way that is... |
7,808 | expressed without any state variables or loopsbut wholly through recursiondef quicksort(lst)"quicksort over list-like sequenceif len(lst= return lst pivot lst[ pivots [ for in lst if =pivotsmall quicksort([ for in lst if pivot]large quicksort([ for in lst if pivot]return small pivots large some names are used in the fu... |
7,809 | tial program flow most imperative programming consists of statements that amount to "do thisthen do thatthen do the other thing if those individual actions are wrapped in functionsmap(lets us do just thislet (etcbe functions that perform actions an execution utility function do_it lambda *argsf(*argsmap()-based action ... |
7,810 | fp-style recursive while loop def while_block()if return elsereturn while_fp lambdaand while_block()or while_fp(while_fp(our translation of while still requires while_block(function that may itself contain statements rather than just expressions we could go further in turning suites into function sequencesusing map(as ... |
7,811 | little program that involves /oloopingand conditional statements as pure expression with recursion (in factas function object that can be passed elsewhere if desiredwe do still utilize the utility function identity_print()but this function is completely generaland can be reused in every functional program expression we... |
7,812 | the emphasis in functional programming issomewhat tautologouslyon calling functions python actually gives us several different ways to create functionsor at least something very function-like ( that can be calledthey areregular functions created with def and given name at definition time anonymous functions created wit... |
7,813 | determine what result to return is not pure function of courseall the other types of callables we discuss also allow reliance on state in various ways the author of this report has long pondered whether he could use some dark magic within python explicitly to declare function as pure--say by decorating it with hypothet... |
7,814 | hello david hello __qualname__ 'hello hello __qualname__ 'hello hello can bind func to other names hello __qualname__ 'hello __qualname__ 'hello hello __qualname__ 'hello one of the reasons that functions are useful is that they isolate state lexicallyand avoid contamination of enclosing namespaces this is limited form... |
7,815 | "hello worldof the different stylesa class that creates callable adder instances class adder(object)def __init__(selfn)self def __call__(selfm)return self add _i adder( "instanceor "imperativewe have constructed something callable that adds five to an argument passed in seems simple and mathematical enough let us also ... |
7,816 | adders [for in range( )adders append(lambda mm+ [adder( for adder in adders[ [adder( for adder in adders[ fortunatelya small change brings behavior that probably better meets our goaladders [for in range( )adders append(lambda mn=nm+ [adder( for adder in adders[ [adder( for adder in adders[ add adders[ add ( can overri... |
7,817 | they take no arguments as gettersand return no value as settersclass car(object)def __init__(self)self _speed @property def speed(self)print("speed is"self _speedreturn self _speed @speed setter def speed(selfvalue)print("setting to"valueself _speed value >car car(car speed setting to car speed speed is odd syntax to p... |
7,818 | class righttriangle(object)"class used solely as namespace for related functions@staticmethod def hypotenuse(ab)return math sqrt( ** ** @staticmethod def sin(ab)return righttriangle hypotenuse(ab@staticmethod def cos(ab)return righttriangle hypotenuse(abkeeping this functionality in class avoids polluting the global (o... |
7,819 | traceback (most recent call lastin (---- product( , , in product(*nums class math(object) def product(*nums)---- return functools reduce(operator mulnums def power_chain(*nums) return functools reduce(operator pownumstypeerrorunsupported operand type(sfor *'mathand 'intif your namespace is entirely bag for pure functio... |
7,820 | primes get_primes(next(primes)next(primes)next(primes( for _prime in zip(range( )primes)print(primeend=" every time you create new object with get_primes(the iterator is the same infinite lazy sequence--another example might pass in some initializing values that affected the result--but the object itself is stateful as... |
7,821 | class scissors(thing)pass many branches first purely imperative version this is going to have lot of repetitivenestedconditional blocks that are easy to get wrongdef beats(xy)if isinstance(xrock)if isinstance(yrock)return none no winner elif isinstance(ypaper)return elif isinstance(yscissors)return elseraise typeerror(... |
7,822 | def beats(selfother)if isinstance(otherrock)return none no winner elif isinstance(otherpaper)return other elif isinstance(otherscissors)return self elseraise typeerror("unknown second thing"class duckpaper(paper)def beats(selfother)if isinstance(otherrock)return self elif isinstance(otherpaper)return none no winner eli... |
7,823 | object(but only to the one controlling objectpattern matching as final trywe can express all the logic more directly using multiple dispatch this should be more readablealbeit there are still number of cases to definefrom multipledispatch import dispatch @dispatch(rockrockdef beats (xy)return none @dispatch(rockpaperde... |
7,824 | really exotic approach to expressing conditionals as dispatch decisions is to include predicates directly within the function signatures (or perhaps within decorators on themas with multipledispatchi do not know of any well-maintained python library that does thisbut let us simply stipulate hypothetical library briefly... |
7,825 | powerful feature of python is its iterator protocol (which we will get to shortlythis capability is only loosely connected to functional programming per sesince python does not quite offer lazy data structures in the sense of language like haskell howeveruse of the iterator protocol--and python' many built-in or standa... |
7,826 | inherent syntax of the language and takes more manual construction given the get_primes(generator function discussed earlierwe might write our own container to simulate the same thingfor examplefrom collections abc import sequence class expandingsequence(sequence)def __init__(selfit)self it it self _cache [def __getite... |
7,827 | the easiest way to create an iterator--that is to saya lazy sequence --in python is to define generator functionas was discussed in the entitled "callables simply use the yield statement within the body of function to define the places (usually in loopwhere values are produced ortechnicallythe easiest way is to use one... |
7,828 | '__iter__in dir(ltrue '__next__in dir(lfalse li iter(literate over concrete collection li li =iter(litrue in functional programming style--or even just generally for readability--writing custom iterators as generator functions is most natural howeverwe can also create custom classes that obey the protocoloften these wi... |
7,829 | the module itertools is collection of very powerful--and carefully designed--functions for performing iterator algebra that isthese allow you to combine iterators in sophisticated ways without having to concretely instantiate anything more than is currently required as well as the basic functions in the module itselfth... |
7,830 | and optimally often requires careful thoughtbut once combinedremarkable power is obtained for dealing with largeor even infiniteiterators that could not be done with concrete collections the documentation for the itertools module contain details on its combinatorial functions as well as number of short recipes for comb... |
7,831 | concrete list of files--that sequence of filenames itself could be lazy iterable per the api given besides the chaining with itertoolswe should mention collec tions chainmap(in the same breath dictionaries (or generally any collections abc mappingare iterable (over their keysjust as we might want to chain multiple sequ... |
7,832 | in the last we saw an iterator algebra that builds on the iter tools module in some wayshigher-order functions (often abbreviated as "hofs"provide similar building blocks to express complex concepts by combining simpler functions into new functions in generala higher-order function is simply function that takes one or ... |
7,833 | transformed map(tranformationiteratorcomprehension transformed (transformation(xfor in iteratorclassic "fp-stylefiltered filter(predicateiteratorcomprehension filtered ( for in iterator if predicate( )the function functools reduce(is very generalvery powerfuland very subtle to use to its full power it takes successive ... |
7,834 | handy utility is compose(this is function that takes sequence of functions and returns function that represents the application of each of these argument functions to data argumentdef compose(*funcs)"""return new function compose( , )( = ( ( )))""def inner(datafuncs=funcs)result data for in reversed(funcs)result (resul... |
7,835 | thatfor exampleto dofrom toolz functoolz import juxt juxt([is_lt is_gt is_prime])( (truetruetrueall(juxt([is_lt is_gt is_prime])( )true juxt([is_lt is_gt is_prime])( (falsetruetruethe utility higher-order functions shown here are just small selection to illustrate composability look at longer text on functional program... |
7,836 | in many languages there are also some examples of using par tial(discussed above the remainder of the functools module is generally devoted to useful decoratorswhich is the topic of the next section decorators although it is--by design--easy to forget itprobably the most common use of higher-order functions in python i... |
7,837 | what is codingthere' been lot of discussion around coding latelybut it can be hard to figure out exactly what it means to code and how it plays role in your child' future coding (or computer programming)is the process of providing instructions to computer so it performs specific task you may have heard of popular text ... |
7,838 | in addition to the many practical and innovative uses for code in today' worldit is also creative medium with coding educationyour child can use their new skills to create almost anything they imaginemake apps games create animations mod minecraft control lego(rfly drones explore stem |
7,839 | when it comes to preparing your child for the futurethere are few better ways to do so than to help them learn to code coding can help your child develop academic skills applicable to any grade levelin addition to building critical life skills like organizationperseveranceand problem solving coding improves your child'... |
7,840 | coding is basic literacy in the digital age it' important for your child to understand and be able to innovate with the technology around them as your child writes more complicated codethey'll naturally develop life skills like focus and organization it also develops resilience when kids codethey learn that it' ok to f... |
7,841 | in today' rapidly evolving digital worldit' more important than ever that your child has the skills they need to adapt and succeed and coding is big part of that jobs are quickly becoming automatedand half of today' highest-paying jobs require some sort of coding knowledge by there will be million computer science-rela... |
7,842 | our award-winning creative computing platform helps kids develop computational thinking and programming skills in funintuitiveand imaginative way as they're guided through interactive game-based courseskids quickly learn fundamental programming concepts with tynkeryour child can apply their coding skills as they build ... |
7,843 | their own pace for more hands-on learnersour drone and robot programming courses are the perfect way to apply coding to the world around them with the tynker appkids can program their own mini-drone to fly patternsperform flips and stuntsand even transport objects and with lego(rwedo kids can use programming to bring t... |
7,844 | tynker introduces kids to coding with simple visual blocks this technique allows young makers to learn the fundamentals of programming and create incredible projects without the frustrations of syntax whenever they're readykids can start experimenting in those same block-based activities by switching between visual and... |
7,845 | tynker' award-winning platform is used by over , schools and million kidsspanning more than countries global partners include brands like applemicrosoftmattelpbssylvan learningand more |
7,846 | tynker' game-based learning environment makes it easy for your child to learn to codeyour child will begin by using tynker' visual blocks to learn fundamental programming concepts through self-guided game-based activitiesthen graduate to text coding languages like javascriptpythonand swift as they gain confidence in th... |
7,847 | tips for encouraging coding at home make screen time productive explore tynker' maker community get inspired by these kid coders how coding helps kids improve in other subjects improve writing abilities strengthen math performance develop creativit build focus and organization start earlygirls who "makechoose stem inve... |
7,848 | the best way to help your child learn to code is to treat it like any other extracurricular activity make habit out of itbuilding habit can take little timebut once your child integrates coding into their daily scheduleyou will see their learning accelerate and their engagement skyrocket check out the following article... |
7,849 | if you're concerned about the amount of screen time your kids are engaging inyou're not alone millions of parents worry that kids spend too much of their lives glued to screensand for good reason according to the bbcthe average child spends over hours each day looking at screen but we'll let you in on little secretyou ... |
7,850 | solving mysteries or puzzlesand codingencourage your kids to find inspiration in the world around them as they make art on their tablets when your kids look for game to playhelp them find game that uses problem-solving skills "he actually gets to use the skills that like to see him work onlike sharing artistic talentmu... |
7,851 | by creating opportunities for your kids to learn during their screen timeyou're helping them build good habits as they begin to discover the magic of makingkids might even take their making skills offline with artlegosor backyard fortsquell your screen time concerns by leveraging that time for learning kids thrive when... |
7,852 | what happens when more than million kids share coding projects with one another in supportive and collaborative spacea whole lot of fun and loads of teachingsharingand supportingwhen asked about their favorite tynker featurekids list things like the ease of coding with blocksthe ability to drawand almost unanimously th... |
7,853 | not only does the tynker community motivate and inspire kids to codebut it also helps them learnwhen we ask kids how they learned to use tynkerthey often cite the tynker community kids look at the code in community projects in order to learn how to code elements of their own games or projects in tynker we've even notic... |
7,854 | garnered within few days and over week she couldn' believe that her game was that popularand the view of her first game encouraged her to continue coding other games tynker parent love for coding (and common understanding of its difficultiesbonds the community togetherthey've all experienced the satisfaction of solving... |
7,855 | hailing from all around the worldour featured makers begin their coding journeys in many different waysthey discover us through enthusiastic teacherssupportive parentsor all on their ownwe discover them as we approve each project for the tynker community each week we share the profile of child whose projects we're espe... |
7,856 | csin his words" want to do something to do with computer science thanks to tynkeri have head start!creative storytellergrace rd gradescotland when grace grows upshe' like to become either doctor or coderin the meantimeshe' practicing by creating amazing stories on tynker " like to code because it' really fun to make yo... |
7,857 | every tynker user has their own reason to code and can relate coding to their dreams for their futureswhether those dreams include cs or not for anthonycomputer science gives him the tools to follow his passion gaminghe aspires to open massive gaming center his father used to ownand even wants to design games himself a... |
7,858 | you've already read little bit about how your child benefits from learning to code you know that it can improve your child' academic performancedevelop important life skillsand prepare your child for the future read through this next section for deeper look at the ways coding helps your child as they learn and grow we ... |
7,859 | developing strong writing skills especially when paired with technical abilities like coding all but guarantees your child success in school and beyond but did you know that writing and coding actually go hand in handwhen they learn to code and create digital storytelling projectschildren acquire skills that improve th... |
7,860 | it' be even better featured tynker maker grace writing script in story-based game forces kids to think through the exact details and consequences of how their characters act they can' be vague they have to hone their ideasan important skill that takes practice " rd graders created stories with dialogue and lively chara... |
7,861 | disposal in the most powerful way possible to express ideas efficiently and directly these are the kids who will write -word college application essay that gets them noticed coding teaches planning and organizing skills programming and writing follow similar process when children start coding projectthey plan out the d... |
7,862 | the conventional belief has always been that kids interested in coding should develop strong math skills howeverit turns out the reverse may also be truecoding can help children build math skills and make learning math more engaging and fun in the three years that casita centera magnet elementary school in southern cal... |
7,863 | grasping abstract math concepts can be challenge to many kids and put them off the subject entirely parentsteachersand technology specialists are using tynker to help children visualize abstract math concepts "one of the most common cross curricular benefits of computer programming is that the kids have an easier time ... |
7,864 | kids who use tynker see how math is inherently creative -year-old jacob myersa big math buff who regularly competes in math contestsuses tynker to make math art with spirals and triangleskids can also complete activities like pattern maker and spin draw to learn how to create art with coding and math coding teaches pro... |
7,865 | casey stares at his computer screencarefully calculating his next move as part of school science project to create simulation of the earth' tideshe has spent the better part of the hour trying to animate moon orbiting the eartha series of commands that is proving more complex than he had anticipated but with every iter... |
7,866 | developed at home and in our schools through the cultivation of three qualities an experimenter' mindset whole brain thinking an innate desire to be creator (and not just consumer programming teaches kids to experiment creative thinking begins with questioning mindset it can be taught by encouraging kids to experimente... |
7,867 | things learning programming with platform like tynker is particularly powerful because it requires kids to use their technical skills (to build the programin combination with their artistic and storytelling skills (to design program that is visually compelling and fun programming gives kids the confidence to create lik... |
7,868 | soft skills are popular notion in the business worldand they encompass qualities like leadershipcommunicationand perseverance although they may be difficult to measuresoft skills are vastly important for children to learn as founder and ceo krishna vedati told the bbc"our goal is not to create programmersbut to offer c... |
7,869 | it' no secret that the distractions we all face impact our ability to focusand kids are no exception to that between shows on tvgames on phonesand other distractionsthere' lot of opportunities for kids to lose focus the instant gratification found in these activities can make it difficult to focuswhich consequently mak... |
7,870 | it happen" like to code because it is sometimes complex it' like when you're working up hill that has jewels at the top it' hard to get up itbut when you get to the top you're really proud and you think it' awesome featured maker anthony the logical nature of programming identifying problemthinking through stepsand the... |
7,871 | the growing shortage of women in computer science and engineering is hot topic these days fortunatelythe future looks bright for the next generation of girlsaccording to new study by intel their research finds that "girls that makedesign and create things using technology may develop stronger interest and greater skill... |
7,872 | tynker is popular coding platform for girls because of its fun and easy approachas well as the variety of projects and tools available to inspire their broad and creative interests girls have created millions of tynker projectssuch as greeting cardsmusic videoscomic cartoonsdigital storiesquiz gamesdrawing toolsmusic m... |
7,873 | imagination to make something awesome it' like drawing and painting and writing all mixed into one quinn "when do tynker it' just fun don' get stressed outbut know ' learning something haley "tynker is lot faster and simpler once built game in another language and it took me about days in tynker it takes about minutes ... |
7,874 | don' have to memorize lines of difficult code you just put the blocks together kami "tynker is easy and simple it' like sentenceyou just fill in the blocks you need to make it do what you want and it' easy to understand on mission to inspire more makers girls and women use technology more than ever it' time for more of... |
7,875 | in today' economywe are in urgent need of people with coding skills to meet the demands of burgeoning tech industry that isn' going to be shrinking anytime soon that' why introducing children to coding is crucial investment in their future coding is skill of the st centuryand with the rapid technological advancement of... |
7,876 | designmake an average of $ , year while linguists can come from wide range of concentrationsbeing computational linguist can earn you about $ , year and computer hardware engineers can easily make an average annual salary of $ , working in any of these fieldsand being able to code using javascriptpythonor any common co... |
7,877 | themselves creatively to get your child interestedshow them what coding allows them to make coding allows them to do anything from writing stories and building video games to making minecraft mods and designing animations andof courseit' funtynker provides the easiest and most enjoyable path to learning how to code kid... |
7,878 | coding at home is great startbut most of us want to see computer science taught to our children at schooltoounfortunatelythere' big disparity between what we would like as parents and the reality of the our education system today according to gallup pollwhile of parents want their child to study computer scienceonly of... |
7,879 | if your school is new to codingthere are plenty of free resources to get started even for teachers without computer science backgroundone quick way to get started is with tynker' hour of code tutorials hour of code is global movement that reaches millions of students in more than countries an initiative designed to get... |
7,880 | kids enjoy (and benefit from!hands-on learning schools can set up makerspace flexible learning space separate from the main teaching area where kids write programs to control dronesrobotsand more tynker integrates with variety of parrot minidronessphero robotsand the lego wedo to make it easy to equip makerspace for yo... |
7,881 | working by stem coordinator jenny chien did you know that just one in ten schools nationwide currently are teaching computer science (csclassesprivate companiesthe federal governmentand states and districts have all invested to make these classes more available as cs classes and programs expandwe can learn some lessons... |
7,882 | about the authors rahul verma rahul is software tester by choicewith focus on technical aspects of the craft he has explored the areas of security testinglarge scale performance engineering and database migration projects he has expertise in design of test automation frameworks rahul has presented at several conference... |
7,883 | table of contents copyright information about the authors foreward preface why write this book what is design pattern context of design patterns in python design pattern classifications who this book is for what this book covers pre-requisites online version feedback model-view-controller pattern controller model view ... |
7,884 | observer pattern sample python implementation example description python code facade pattern sample python implementation example description python code mediator pattern sample python implementation example description python code factory pattern sample python implementation example description python code proxy patte... |
7,885 | foreword vipul kocher shri ramkrishna paramhansone of the greatest mystics of this age and guru of swami vivekanandaused to narrate story that went like this "there was ghost who was very lonely it is said that when person dies an accidental death on tuesday or saturday becomes ghost whenever that ghost saw an accident... |
7,886 | preface "testers are poor coders we here that more often than one would think there is prominent shade of truth in this statement as testers mostly code to --get the work done||at times using scripting languages which are vendor specificjust tweaking recorded script the quality of code written is rarely concern and mos... |
7,887 | --shouldn' we use for this implementation?|without talking about how classes would be implemented and how objects would be created it is similar to asking tester to do boundary value analysis (even bva should do!)rather than triggering long talk on the subject design patterns should not be confused with frameworks and ... |
7,888 | this is an initial version of the book covering the following design patternsdp# model-view-controller pattern dp# command pattern dp# observer pattern dp# facade pattern dp# mediator pattern dp# factory pattern dp# proxy pattern because the current number of design patterns is handfulwe have not categorized them based... |
7,889 | dp the model-view-controller pattern introduction as per wikipedia"model-view-controller (mvcis software architecturecurrently considered an architectural pattern used in software engineering the pattern isolates "domain logic(the application logic for the userfrom input and presentation (gui)permitting independent dev... |
7,890 | view deals with how the fetched data is presented to the user let' talk about all these components in detailcontroller controller can be considered as middle man between user and processing (modelformatting (viewlogic it is an entry point for all the user requests or inputs to the application the controller accepts the... |
7,891 | them to see or pre-determined format the format in which the data can be visible to users can be of any _typelike html or xml it is responsibility of the controller to choose view to display data to the user type of view could be chosen based on the model chosenuser configuration etc sample python implementation exampl... |
7,892 | return list def getsummary(selfid)query '''select summary from defects where id '% ''id summary self _dbselect(queryfor row in summaryreturn row[ def _dbselect(selfquery)connection sqlite connect('tms'cursorobj connection cursor(results cursorobj execute(queryconnection commit(cursorobj close(return results class defec... |
7,893 | print controller getdefectsummary( displaying defect list for 'abccomponent print controller getdefectlist('abc'explanation controller would first get the query from the user it would know that the query is for viewing defects accordingly it would choose defectmodel if the query is for particular defectcontroller calls... |
7,894 | dp command pattern introduction as per wikipedia"in object-oriented programmingthe command pattern is design pattern in which an object is used to represent and encapsulate all the information needed to call method at later time this information includes the method namethe object that owns the method and values for the... |
7,895 | command pattern is associated with three componentsthe clientthe invokerand the receiver let' take look at all the three components clientthe client represents the one that instantiates the encapsulated object invokerthe invoker is responsible for deciding when the method is to be invoked or called receiverthe receiver... |
7,896 | self __flipdowncommand flipdowncmd def flipup(self)self __flipupcommand execute(def flipdown(self)self __flipdowncommand execute(class light"""the receiver class""def turnon(self)print "the light is ondef turnoff(self)print "the light is offclass command"""the command abstract class""def __init__(self)pass #make change... |
7,897 | def __init__(self)self __lamp light(self __switchup flipupcommand(self __lampself __switchdown flipdowncommand(self __lampself __switch switch(self __switchup,self __switchdowndef switch(self,cmd)cmd cmd strip(upper(tryif cmd ="on"self __switch flipup(elif cmd ="off"self __switch flipdown(elseprint "argument \"on\or \"... |
7,898 | dp observer pattern introduction as per wikipedia"the observer pattern ( subset of the publish/subscribe patternis software design pattern in which an objectcalled the subjectmaintains list of its dependantscalled observersand notifies them automatically of any state changesusually by calling one of their methods it is... |
7,899 | to summarizesubscriber objects can register and unregister with the publisher object so whenever an eventthat drives the publisher' notification methodoccursthe publisher notifies the subscriber objects the notifications would only be passed to the objects that are registered with the subject at the time of occurrence ... |
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