TypedArray: Unit8Array, Int32Array这些都是TypedArray, 那些 Uint32Array 也好,Int16Array 也好,都是给 ArrayBuffer 提供了一个 “View”,MDN上的原话叫做 “Multiple views on the same data”,对它们进行下标读写,最终都会反应到它所建立在的 ArrayBuffer 之上。 ArrayBuffer 本身只是一个 0 和 1 存放在一行...
// 简易版深拷贝constisReferenceType=(value)=>typeofvalue==='object'&&value!==null;functioncloneDeep(obj){if(!isReferenceType(obj)){returnobj}constcloneObj=Array.isArray(obj)?[]:{}Object.keys(obj).forEach(key=>{constvalue=obj[key]// 如果深层依然是对象 递归调用constcloneValue=isReferenceT...
required:false},//existFileList: {//type: Array,//default: function () {//return [/// {url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'},/// {url: 'https://fuss10.elemecdn.com/3/63/4e7f3a...
classMinStack{stack:Array<number>;// 维护一个数组做stackmin:number;// 维护一个minconstructor() {this.stack= [];this.min=Infinity; }push(x:number):void{// push进来 除了放进来 还要比较是否最小 最小换掉minthis.stack.push(x);if(x <this.min)this.min= x; }pop():void{// pop出去 除...
If you open retainers path you will see this string is somehow referenced viareq, then there is context created and all this added to some giant array of closures. So at this point we know that we have some kind of gigantic array of closures. Let’s actually go and give a name to al...
Object/array only in immutable form Having these types of data allows us to shallowly compare the props that come into React components. Next example shows how to diff the props in the simplest way possible: $ npm install react-pure-render import shallowEqual from 'react-pure-render/shallowEqu...
When dealing with larger web applications, loading all components upfront may impact the initial page load time. Code splitting allows you to split your application into smaller chunks and load them on-demand. In React, you can use the React.lazy() function and dynamic imports to achieve lazy...
Get the position of element inside an array, or -1 if not found.$.isArray $.isArray(object) ⇒ boolean True if the object is an array.$.isFunction $.isFunction(object) ⇒ boolean True if the object is a function.$
Move the array containing the supported image mime types in display_utils by @calixteman in #19394 Avoid to remove the active overlay when a cancelled dialog (like the file picker) was called from a dialog by @calixteman in #19395 [Editor] Add some functions in order to extract contours ...
To insert more than one record, make an array containing the values, and insert a question mark in the sql, which will be replaced by the value array: INSERT INTO customers (name, address) VALUES ? Example Fill the "customers" table with data: ...