// 一个带有2个参数的基本函数:functionadd(one,two){returnone+two;}// 调用这个函数并给它2个参数:varresult=add(1,42);console.log(result);// 43// 再次调用这个函数,给它另外2个参数result=add(5,20);console.log(result);// 25 JavaScript 是一个将函数作为一等对象(first-class functions)的语言。
Thankfully, the Windows Runtime provides a solution to this problem, which allows you to store “weak” references to objects. A weak reference doesn’t block the GC from cleaning up the object it refers to and, when dereferenced, it can return either the object or null. To better underst...
The benefit here is that you see that the return is a string without having to guess. Type inference is a major help when it comes to working with other libraries that developers reference in their code, such as JQuery or even the Document Object Model (DOM). The other way to take adva...
//Define the functions that add to the stringfunctionaddPrefix(str) {return"prefix-" +str; }functionaddSuffix(str) {returnstr + "-suffix"; }functiontoUppercase(str) {returnstr.toUpperCase() }//Create a piped function that applies the three functions in the correct orderconst decorated1 =pipe...
Otherwise, keep the braces and use a return statement. eslint: arrow-parens, arrow-body-style Why? Syntactic sugar. It reads well when multiple functions are chained together. // bad [1, 2, 3].map((number) => { const nextNumber = number + 1; `A string containing the ${nextNumber...
JavaScript Copy export function returnArrayAsync() { DotNet.invokeMethodAsync('BlazorSample', 'ReturnArrayAsync', 14) .then(data => { console.log(data); }); } The component's invokable ReturnArrayAsync method receives the starting position and constructs the array from it. The array i...
Wrap existing functions with additional functionality (often used to implement cross-cutting concerns, such as logging). A function that adds functionality to another function is called a function decorator. Take a function that requires multiple parameters, and return a function that requires fewer pa...
{ /// /// Private function to return the server URL from the context /// ///<returns>String</returns> var clientUrl = this._context().getClientUrl() return clientUrl; }, _ODataPath: function () { /// /// Private function to return the path to the REST endpoint. /// ///...
Given a DOM node or string ID or an array (pNd), this function returns an array. Used for creating DOM based functionality that can accept a single or multiple DOM nodes. Return Value pNd (DOM Node | string ID | Array) Parameters ...
varSales="Toyota";functionCarTypes(name){return(name==="Honda")?name:"Sorry, we don't sell "+name+".";}varcar={myCar:"Saturn",getCar:CarTypes("Honda"),special:Sales};console.log(car.myCar);// Saturnconsole.log(car.getCar);// Hondaconsole.log(car.special);// Toyota ...