array.find(callback) JavaScript Copy 其中,array 是要查找的数组,callback 是判断条件的回调函数。 下面是一个使用 find() 方法判断数组是否包含特定值的示例代码: constusers=[{id:1,name:'Alice'},{id:2,name:'Bob'},{id:3,name:'Charlie'}];constuser=users.find(item=>item.id===2);console.lo...
js中Array自定义contains, indexOf, delete方法. Array.prototype.contains =function(elem) {for(vari = 0; i <this.length; i++) {if(this[i] ==elem) {returntrue; } }returnfalse; } Array.prototype.indexOf=function(o){for(vari = 0 ; i<this.length;i++){if(this[i] ==o){returni; ...
regs.push(new Array("item_1","^[\\s\\S]+$","item_1Span","法人代表不能为空","填写正确",true)); regs.push(new Array("item_2","^[\\s\\S]+$","item_2Span","开户银行不能为空","填写正确",true)); regs.push(new Array("item_3","^[\\s\\S]+$","item_3Span","帐号...
refs https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes https://www.w3schools.com/jsref/jsref_includes_array.asp#:~:text=The includes() method determines,...
JS中的indexOf方法 indexOf()简介 indexOf()是js中内置的方法之一,它的功能大家都很熟悉:简单来说就是得到数据的索引,对于正则不熟练的人,是个很不错的方法。...的场景进行讨论(其实就是string和array) 注:(暂不讨论两个参数时(第二个参数为查询的起始位置),以及lastIndexOf()) String类型使用indexOf();...
Array.prototype.contains = function (key) { // log(`\nthis`, this, this.length); // for (let item in this) { for (let item of this) { // log(`item =,`, item); // log(`key =`, key); // if (item == key) { ...
在JS中,判断一个数组中是否包含某个值,一般用indexOf(),今天我们用contains,跟写java一样判断数组包含某个值,但是js原生是没有数组的contains,所以我们要先自己封装一下,给Array...("jpg")){ //如果arrFileNames数组里包含"jpg" 返回true ...
Use a for...of loop to iterate over the first array. If any element is contained in the second array, set the variable to true. App.js const arr1 = ['pizza', 'cake', 'cola']; const arr2 = ['pizza', 'beer']; let containsAny = false; for (const element of arr1) { if (...
Array.prototype.contains = function (obj) { var index = this.length; while (index--){ if (this[index] === obj) { return true; } } return false; } JS遍历对象 for (var index in arr){ console.log(arr[index]); console.log(index); } for-in是为遍历对象⽽设计的,不适⽤于遍历...
feat: update includeSelector in ArticlesAutoTranslate workflow (#406) … Verified 9758182 Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment Assignees No one assigned Labels ukrainian Projects [NEWS I18N] - Ukrainian Status: Todo +3 more ...