functional programming tutorial

Java 8 introduces lambda expressions, as well as functional programming styles. In understanding the functional programming process, made some notes, excerpts from this article.Nested functions (Nested function)1. A nested function refers to a function defined within another function. The outer function, which is refer

::println);This line looks a bit like the syntax of the scope parsing in C + +, which is also possible here.3. Implementing a map with a lambda expressionA reference to functional programming, a reference to lambda expression, how can not mention the map ... Yes, Java8 is certainly supportive. Take a look at the sample code: @Test public void mapTest() { List.asList(10.0, 20.0,30.0); cost.strea

For what is functional programming, this is the parrot. This article does not intend to define this, but the hope and garden friends to discuss this topic, throwing bricks only for the jade. 1, Wikipedia gives the definition is: Functional programming is a programming para

The object nature of functional programming in JavaScript:Function (){Var x = "something ";Return B (){// Do with x;}}Var c = ();EquivalentFunction (){This. x = "dosomething ";This. B = function (){// Do with this. x}}Var c = new ();However1) functional programming instinctively avoids the construction of useless objec

for functional programming: Functional programming means a tool that applies some function to the corresponding sequence. For example, some elements (filter) are filtered based on one side of the function, and functions are applied to each pair of elements and run to the final result (reduce). Since both range and fil

As a parameter If you are familiar with the OOP template method mode, you can quickly learn to pass functions as parameters. The two are basically the same, but here we pass the function itself rather than the object that implements an interface.Let's warm-up the previously defined summation function Add: ? 1 Print Add ('Tree of triangles','Arctic') Unlike the addition operator, you must be surprised that the answer is 'trigonometric function '. This is a built-in

function-type programmingFunctional programming is a kind of programming method, it treats the computer operation as the function computation; In layman's terms, a mathematical logic is used to define an expression, and then a function is used to implement this function.Example (python3.0+):y = 2*x+1 ----first define a mathematical expression def cal (x): "' Description: function to implement the above exp

..0] The value of the first list is a multiple of all 3 from 0 to 30, and the element of the second list contains 9 to 0. We can also obtain another list by repeating one list. For example: letsquares=[forxin1..10->x*x] Loop through for. The elements in the squares list are the squares of integers ranging from 1 to 10. In addition, you can add the when clause to filter elements in a loop. Only when the value of the when clause is true: letevens=[forxin1..10whenx%2=0->x] The evens element is [2;

Learned some of Scala's basic grammar http://twitter.github.io/scala_school/zh_cn/index.html,Try Scala's functional programming.How to implement with functional programming: SUM (f, a, b) =s = 0For i in [A, b]S+=f (i)return sThis is the pseudo-code for imperative programming, C/s + +.1. Implementation 1.1 def sum (f:in

1. Why Learning functional programming? To improve yourself, learn functional programming 2. What language should I learn? Select one that meets your needs. I think, if you are a very experienced programmer, the best answer to this question is: choose one that meets your needs. If you need to work

A nullable type has been encountered in our actual development, whereas in C # since 2.0 a nullable type (nullable) has been provided, the normal value type is not assignable to NULL, but a question mark after the type becomes a nullable type. This makes it possible to assign a value of NULL. Of course, such a way can also be used in functional programming, but function