// function return if an element is found in the array, else falsefunctioncheckTrueExistsArray(array) {for(vark=0;k<array.length;k++) {if(array[k]) {returntrue;break;}}returnfalse;}vararrayVariable=[false,false,true,false,true];vararrayVariable1=[false,false,false,false,false];console....
//code to check if a value exists in an array using javascript for loop var fruits_arr = ['Apple', 'Mango', 'Grapes', 'Orange', 'Fig', 'Cherry']; function checkValue(value, arr) { var status = 'Not exist'; for (var i = 0; i < arr.length; i++) { var name = arr[...
使用contains函数确定指定对象是否是Array对象中的元素。 在Mozilla Firefox 中,如果数组中的项已设置为undefined,则调用item 设置为undefined 的contains函数将返回true。同样的情况下,在所有其他浏览器中,函数都返回false。
var regs = new Array(); 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]...
Write a JavaScript function to find an array containing a specific element. Test data: arr = [2, 5, 9, 6]; console.log(contains(arr, 5)); [True] Visual Presentation: Sample Solution: JavaScript Code: // Function to check if an array contains a specific elementfunctioncontains(arr,elemen...
valueOf//继承自 object String String对象是文本值的包装器。除了存储文本,String对象包含一个属性和各种 方法来操作或收集有关文本的信息,String对象不需要进行实例化便能够使用。 String对象只有一个只读的length属性用于返回字符串的长度。 包装对象 除了上面三个对象,Javascript 还拥有 Date、Array、Math 等内置对象...
Ajavascript objectconsists of key-value pairs where keys are unique. If you try to add a duplicate key with a different value, then the older value for that key is overwritten by the new value. With this concept, we can easily find out if an array contains duplicate values using below ...
JavaScript Array indexOf()The indexOf() method searches an array for an element value and returns its position.Note: The first item has position 0, the second item has position 1, and so on.Example Search an array for the item "Apple": const fruits = ["Apple", "Orange", "Apple", ...
If activated 'template', 'content' and 'title' options will be sanitized. whiteList object Default value Object which contains allowed attributes and tags sanitizeFn null | function null Here you can supply your own sanitize function. This can be useful if you prefer to use a dedicated library...
whiteList object Default value Object which contains allowed attributes and tags sanitizeFn null | function null Here you can supply your own sanitize function. This can be useful if you prefer to use a dedicated library to perform sanitization. Data attributes for individual popovers Options for in...