The find() method returns the value of the first element in the array that satisfies the provided testing function. Otherwise undefined is returned....
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The difference between forEach and map is that the former doesn't return the results of the iteration.map (sometimes a.k.a. collect, but very different from apply) is expressly for transforming each element of an array into a corresponding result; it's a 1-to-1 mapping, hence the name....
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