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Use js to determine whether an array contains an element (similar to in_array() in php)

高洛峰

Release： 2016-12-22 13:39:13

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while case is the fastest

function contains(arr, str) {
    var i = arr.length;
    while (i--) {
           if (arr[i] === str) {
           return true;
           }   
    }   
    return false;
}

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