How to determine whether an array contains specified elements in jquery

Jquery method to determine whether the array contains the specified element: 1. Use the js method to determine, the code is [console.log(isInArray(arr,'java'))]; 2. Use the jQuery method to determine, The code is [var index = $.inArray()].

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Jquery method to determine whether an array contains the specified element:

1. js method to determine

/**
* 使用循环的方式判断一个元素是否存在于一个数组中
* @param {Object} arr 数组
* @param {Object} value 元素值
*/
function isInArray(arr,value){
for(var i = 0; i < arr.length; i++){
if(value === arr[i]){
return true;
}
}
return false;
}
console.log(isInArray(arr,&#39;java&#39;));//循环的方式

2. jQuery method to determine

/**
* 使用jquery的inArray方法判断元素是否存在于数组中
* @param {Object} arr 数组
* @param {Object} value 元素值
*/
var index = $.inArray(value,arr);//返回下标值，index>=0时表示该数组包含指定元素，否则表示不存在；
console.log($.inArray('java',arr)>=0);

If the project Introducing the jq package, the author recommends the second method. If the first method is not available, the problem can be solved;

Related free learning recommendations: JavaScript (video)

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