first-class function 头等函数:函数将会像任何其他变量一样被对待。例如, 一个函数可以作为参数传递给其他函数,可以被当作返回值被另一个函数返回,可以当作值指定给一个变量。 1.将函数作为参数 2.将函数作为返回值 假如我们需要调用sayHello这个函数,然后让它返回一个匿名函数,我们有两种方法: 如果你直接用sayHello...
A function that takes a function as argument or returns a function as the result is a high-order function. One example is the built-in functionsorted: an optional key argument lets you provide a function to be applied to each item for sorting. And anyone-argumentfunction can be used as t...
这篇文章在写作时,"function" 和"函数"两个名词会有混用的情况,主要是一些情况会更加通顺。 一、简介 这篇笔记是在我看 Dan Bader 的《Python Tricks: A Buffet of Awesome Python Features》时写下的,主要是理解 Decorators 之前要先懂 First-Class Functions。
描述函数在编程语言中的地位,First-class Function 即函数是一等的,或者头等。(类似飞机上头等舱的头等) 其含义是,函数可以和其他的变量一样的对待。可以赋值给变量,可以作为函数的返回值返回,可以作为参数传递给其他函数。 JavaScript就是一种有First-class Function的语言。参考...
Let's go over a few points about first-class functions. What does it mean? A first-class function, first-class anything, means that the function can be, if it's first class, it means it can be treated like a value.Anything you can do to a value such as a number or an array or...
A first-class function may, as with other data types, be created in literal form without ever having been assigned an identifier; be stored in a container such as a value, variable, or data structure; and be used as a parameter to another function or used as the return value from ...
first-class-function 是在优酷播出的科技高清视频,于2015-07-13 11:55:37上线。视频内容简介:first-class-function
This is achieved by staged development involving: multiple instances of the one function type; data transmission via parameter/result; recursion; and lazy evaluation.Bailes, P.A.Johnston, D.Institute of Electric and Electronic EngineerComputing and Information, 1993. Proceedings ICCI '93: Fifth ...
爱上JavaScript,值得学,更可以玩。深入了解JavaScript如何在幕后工作。理解和使用诸如“this”关键字,函数构造函数,原型继承,first class Function,闭包等复杂功能。 课程简介 课程大纲: JavaScript基础技能 JavaScript底层运行机制(I) DOM操作、事件和特效 对象、继承、函数 JavaScript底层运行机制(II)...
First-classvalue can be passed as an argument returned from a subroutine assigned into a variable. Second-classvalue just can be passed as an argument. Third-classvalue even can't be passed as an argument. 更多: http:///wiki/First-class_function ...