尋找是否有符合的元素. 方法一： indexOf. 使用原生JavaScript 的 Array.prototype.indexOf() 。 如下例，陣列fruit 中 ... ... <看更多>

To find the position of an element in an array, you use the indexOf() method. This method returns the index of the first occurrence the element that you want to ... ... <看更多>

If you have worked with JavaScript at any length you are aware that IE does not implement. the ECMAScript function for Array.prototype.indexOf() [including ... ... <看更多>

I'm pretty newbie with JavaScript and I don't know if there is a simple method or if I should build my own function to do that. Share. ... <看更多>

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indexOf · javascript optimization array. How can I optimize checking a value in recursion before operating on it? I'm using Array ... ... <看更多>