在JavaScript中,function是一个基础而强大的概念,用于定义和存储可执行的代码块。函数可以接受输入参数、处理这些数据、并可选择返回输出结果。这使得代码的重用和模块化成为可能。函数可以被创建、调用,并作为值传递,它们是一等公民,这意味着函数可以像任何其他类型的值一样被赋予变量、作为参数传递或作为其他函数的返回...
function sortNumberqixy(a, b) { /* 马克-to-win returned value type: Array object JavaScript syntax: - myArray.sort() - myArray.sort(aComparator) Argument list: aComparator A function object that will compare two items and returns a flag indicating their order in the sort collating seque...
同时把 x 挂到 Function 的 prototype 属性上，即 Function.prototype = x 同时还可以把 x.constructor...
{ 215 function inside(y) { 216 return x + y; 217 } 218 return inside; 219 } 220 fn_inside = outside(3); // Think of it like: give me a function that adds 3 to whatever you give it 221 result = fn_inside(5); // returns 8 222 223 result1 = outside(3)(5); // ...
// 2) or inside the body // of another function function innerFD() {} } These are the only two positions in code where a function may be declared (i.e. it is impossible to declare it in an expression position or inside a code block). ...
However, a name can be provided with a function expression, and can be used inside the function to refer to itself, or in a debugger to identify the function in stack traces: 当然函数表达式也可以提供名字,这个名字可以用来在function内部调用自己,或者调试的时候用到。如下面的例子: ...
Inside the constructor definition, we define theinfomember function. $ node main.js John Doe, jdoe@example.com JS Function type JavaScript is also a powerful object-oriented language. Each function is an object too. Its type isFunction. Functions can be created with thenew Functionconstructor,...
() 的作用：立即执行函数构建独立不受污染的作用域 参考 Ecma-262http://stackoverflow.com/questions/4043647/what-does-this-function-a-function-inside-brackets-mean-in-javascripthttp://stackoverflow.com/questions/440739/what-do-parentheses-surrounding-a-javascript-object-function-class-declaration-m ...
Naming rules: same as JavaScript variables. parametersOptional. A set of arguments (parameter names), separated by commas. The arguments are real values received by the function from the outside. Inside the function, the arguments are used as local variables. ...
Some common JavaScript library functions are:Library FunctionDescription console.log() Prints the string inside the quotation marks. Math.sqrt() Returns the square root of a number. Math.pow() Returns the power of a number. toUpperCase() Returns the string converted to uppercase. toLowerCase()...