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>

How to fix Array indexOf() in JavaScript for IE browsers - array_index_of.js. ... the ECMAScript function for Array.prototype.indexOf() [including IE8]. ... <看更多>

You can match using function's name property. function A () { } function B () { } const functions = [B, A]; const indexOfA = functions.map(f ... ... <看更多>

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var nums = [], lengths = []; function findNumLength(n) {. This function name would do better to actually mention collatz. //preliminary check to see if ... ... <看更多>