What is the most concise and efficient way to find out if a JavaScript array contains a value? This is the only way I know to do it: function contains(a, obj) { ... ... <看更多>

使用原生JavaScript 的 Array.prototype. ... var fruits = ['apple', 'orange', 'grape']; var filtered = fruits.filter(function(value) { return ... ... <看更多>

in this tutorial, you will learn how to use the JavaScript Array forEach method to execute a function on every element in an array. ... <看更多>

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