java 8 functional programming

():2015-01-28>>>log (now)__name__'wrapper'▲ Partial functionPython's Functools module provides a number of useful functions, one of which is the partial function.The function of a partial function is to fix some parameters of a function (set default values) and return a new function. It is easier to call this new function.When you create a partial function, you can actually accept the three parameters of the function object, *args,**kw (keywords).The sample code is as follows:#converting a stri

[Python] function programming There was a course called 'artificial intelligence 'last semester. the teacher forced us to learn a language called prolog. wow, it was really uncomfortable, the way of thinking is completely different from what I have learned before. I 've been thinking about a tower for a long time, and finally I found some code on the Internet to modify it (for fear of being discovered by the teacher, post it and feel it: hanoi(N) :- d

), target) = (EQU)idx5 Case_ = = Loop (idx + 1)6 }7Loop (0)8 9}//> Findfirsta: [A] (Arr:array[a], target:a) (equ: (A, a) = = Boolean) IntTenFindfirsta[int] (Array (2,4,3,9,0), 3) ((x, y) = = =y) One //> res57:int = 2 AFindfirsta[string] (Array ("Hello", "My", "World"), "My") ((x, y) = = =y) - //> res58:int = 1Findfirsta is a polymorphic functio

Function-Type programming Last semester there is a class called ' Artificial intelligence ', the teacher forced us to learn a language called Prolog, wow that feeling is really uncomfortable, the way of thinking completely and previously learned not the same, write a Hanoi thought for a long time, finally or on the Internet to find a paragraph code modification (afraid of the teacher found plagiarism) just write out, Post a paragraph to feel it: Hanoi

effect. It is common practice to place an action in a class that implements an interface, and then pass one instance of the class to another method.To enable this syntax, you need to provide an implicit conversion.8. Assembly function ProgrammingThe function of the List,set collection is mainly the operation of Val list=list ("Scala", "Spark", "Hadoop") List.map (_) List.map (println) mutable (variable), immutable (immutable ) Scala.collection.Map: I

:　　lambdaRepresents the anonymous function, which represents the function parameter before the colon, that x is, there can be only one expression, without writing return , and the return value is the result of the expression.>>>map(lambda x: x * x, [1, 2, 3, 4, 5, 6, 7, 8, 9])5. Adorner: Suppose we want to enhance 某个 the function of functions, for example, automatically print the log before and after the function call, but do not want to modify the de

/wKiom1iAZgiiA132AABUin_qCHk320.png-wh_500x0-wm_3 -wmp_4-s_2485696303.png "title=" 11.png "alt=" Wkiom1iazgiia132aabuin_qchk320.png-wh_50 "/>Example: Passing a named function650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M01/8C/FA/wKiom1iAZhqztMPyAAEpGTxyBNc172.png-wh_500x0-wm_3 -wmp_4-s_3250345437.png "title=" 22.png "alt=" Wkiom1iazhqztmpyaaepgtxybnc172.png-wh_50 "/> anonymous functions Anonymous functions are inline-defined functions that do not have identifiers, and are

this method by adding a @xxx annotation to the method name. However, Java/c# 's annotation is also very daunting, too TMD complex, you want to play it, you need to know a bunch of annotation library documents, let people feel is learning another language. Python uses a very elegant method relative to decorator pattern and annotation, which does not require you to master any complex OO models or the various class library rules of annotation. It's all

Javascript functional programming programmer's tool set and javascript tool set If you carefully read the sample code that has appeared so far, you will find that some of the methods here are unfamiliar. They are map (), filter (), and reduce () functions, which are crucial to functional programming in any language. Th

Python's decorator is similar to java/c# 's annotation in its use, which is to decorate something for this method by adding a @xxx annotation to the method name. However, Java/c# 's annotation is also very daunting, too TMD complex, you want to play it, you need to know a bunch of annotation library documents, let people feel is learning another language. Python uses a very elegant method relative to decora

After a long time, finally take the leisure time to continue to the functional programming of the album, this time begins to prepare for the new direction of IOS , the OC Tutorial written in the SWIFT version, of course, I personally support Xamarin, but I will generally first master the original ecological development, and then master Xamarin. The rest of the time developed a Xamarin App project that took

Security Code: Indifferent ChildePython-Functional Programming:Functional Programming:Also known as functional programming, is a programming paradigm, which is the implementation of the function can be passed to another function as a parameter;It treats the computer operation as a mathematical function calculation, and

Atitit. the main types of programming languages and Trend -Logical language: Functional language ... Command-language1. The main kind of programming language logical language: Functional language ... Imperative language 12. Logical language , No need to consider the implementation process and only consider definitions

Functional Interface Overview: There is only one abstract method in the interfaceThe following may be very abstract, can not understand, at least in my opinion, the individual excuses are useless, with the bottom of the stream stream to use in order to have the effect Functional interface, which is the interface for functional

Functional Programming:Features: The arguments that are allowed to be passed are functions and allow a function to be returned.Because Python allows the use of variables, Python is not a purely functional programming language, and the same input may have different output and side effects. Purely functional

pressure However, sometimes some development teams that have been developing applications for a long time do not really feel the role of "peer pressure", because the implementation of peer pressure requires some prerequisites to support. 1.Cross-functional teams If the division of labor is too detailed and technical barriers are too high, it is difficult to make a joint estimation. Some teams are cross-functi