「2)Array.from」 Array.from 的设计初衷是快速基于其他对象创建新数组,准确来说就是从一个类似数组的可迭代对象中创建一个新的数组实例。其实,只要一个对象有迭代器,Array.from 就能把它变成一个数组(注意:该方法会返回一个的数组,不会改变原对象)。 从语法上看,Array.from 有 3 个参数: 类似数组的对象,必...
array.unique(ar) Return only unique array values from array ar.const myElement = Rocket.dom.element('element'); const myNumbers = [1,1,2,3,4,5,5,5,5]; const myString = 'This is a string'; Rocket.array.make(myElement); // Returns [element] Rocket.array.make(myNumbers); // ...
7-8.js const threeArray = ["One", "Two", "Three"]; //Imperative code describing how a program operates for(let i = 0; threeArray.length > i; i++){ console.log(threeArray[i]); //returns One, Two, Three } //Declarative code showing how a program should work threeArray.map((...
To provide a unique, bottom and top offset just provide an object offset: { top: 10 } or offset: { top: 10, bottom: 5 }. Use a function when you need to dynamically calculate an offset. target selector | node | jQuery element the window object Specifies the target element of the ...
To provide a unique, bottom and top offset just provide an object offset: { top: 10 } or offset: { top: 10, bottom: 5 }. Use a function when you need to dynamically calculate an offset. target selector | node | jQuery element the window object Specifies the target element of the ...
distinct (elementSelector) / unique - returns distinct elements from array. Optional parameter elementSelector will create new array based on a callback function, then will eliminate dublicates pivot (array, rowFields, columnField, dataField, aggFunction?, columnValues?) - Returns a reshaped (...
In this code we create a binding list (an instance of the List type from the WinJS.Binding namespace) and we loop over an array of values, using each to create a timeout, which is a promise that will fire at some time in the future according to the argument you pass (milliseconds)...
In this example, each Silverlight plug-in is given a unique id and userContext value. The OnLoad event handler uses these values to update the browser status bar, which indicates the load order. This example uses a JavaScript function to handle the plug-in's OnError event, but leaves the...
varthirdObj =newBaseObject('unique');console.log(thirdObj.name);// -> Results in 'unique'deletethirdObj.name;console.log(thirdObj.name);// -> Results in 'default' JavaScript Issue No. 8: Creating Incorrect References to Instance Methods ...
var values = [0, 1, 5, 10, 15]; values.sort(compare); alert(values); //0,1,5,10,15 迭代方法 以下是数组的 5 个迭代方法的作用。 every():对数组中的每一项运行给定函数,如果该函数对每一项都返回 true,则返回 true。 filter():对数组中的每一项运行给定函数,返回该函数会返回 true 的项组...