console.log(ary2.next());//Object {value: Array[2], done: false} value:Array[2] ---[0:0,1:1]; console.log(ary2.next());//Object {value: Array[2], done: false} value:Array[2] ---[0:1,1:2]; //可以看出每次执行这个next().都会返回一个该数组的索引和值组成的新的数组,被...
Array - JavaScript | MDN 零. 创建数组 1 - [ ] const arr = [] const list = ['a','b'] 1. 2. 3. 2 - new Array( 长度 ) const arr = new Array() // 创建长度为1024的数组,并且往里填充数字为100 => 也就是 [ 100,100,100,...1024个 ] const list = new Array(1024).fill(1...
imageData:格式为 [r0, g0, b0, a0, r1, g1, b1, a1, ...] 的Uint8ClampedArray( 8位无符号整型固定数组) 的rgba 像素值。 const code = jsQR(imageData, width, height, options); if (code) { console.log('找到二维码!', code); } 前往github 深入了解:jsQR 代码实现 流程 整个扫码流程...
Just like for .map and .filter methods, .reduce is applied on an array and takes a function as the first parameter.This time though, there are changes:.reduce takes two parameters The first parameter is a function that will be called at each iteration step....
topicIds Array Optional count string Optional Example unsplash.photos.getRandom({}); unsplash.photos.getRandom({ count: 10, }); unsplash.photos.getRandom({ collectionIds: ['abc123'], topicIds: ['def456'], featured: true, username: 'naoufal', query: 'dog', count: 1, }); photos.track...
"undefined" != typeof Storage && (Storage.prototype.setObject = function(t, e) { this.setItem(t, JSON.stringify(e)) } , Storage.prototype.getObject = function(t) { t = this.getItem(t); return t && JSON.parse(t) } ), Array.prototype.find || (Array.prototype.find = function(t)...
$data = json_encode(array("id" => "1", "name" => "tom")); $callback = $_GET["callback"]; echo $callback . "(" . $data . ")"; 1. 2. 3. 实际上最后返回的内容就是一段js代码: jQuery211018970995225637144_1465350372062({"id":"1","name":"tom"}) ...
array-union@^1.0.1: version "1.0.2" resolved "https://registry.npmmirror.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39" integrity sha512-Dxr6QJj/RdU/hCaBjOfxW+q6lyuVE6JFWIrAUpuOOhoJJoQ99cUn3igRaHVB5P9WrgFVN0FfArM3x0cueOU8ng== ...
赋值方法 (Mutator methods) 这些方法直接修改数组自身 pop 和 push Array.pop(); // 删除数组最后一个元素,返回被删除的元素 Array.push(element1, ..., elementN); // 在数组尾部插入1-N个元素,返回操作后数组的length 通过这 pop 和 push ,就能把数组模拟成 堆栈(stack) 来进行操作。
var a =[1,3,4,2,5,6,3,4,2,4] Array.from(new Set(a)) //[1,3,4,2,5,6] WeakMap 任意类型去重 10.如何用正则实现 string.trim() ?function trim(string){ return string.replace(/^\s+|\s+$/g,'') } 11.JS原型是什么?