JavaScript Interview Question map vs forEach : When to Use Each
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🚀🎓 In this video I have discussed an oftern asked JavaScript interview question regarding the diffrenece between map and forEach.
Further, the scenarios when each one is used is discussed in detail.
As a part of regular JavaScript development, we often need to work with arrays. And when we’re working with arrays, we often need to process array elements, so we need a way to loop through each element of an array. In JavaScript, forEach and map are two of the most popular methods to work with arrays. The primary purpose of both these methods is to iterate through arrays. Although they may look almost identical, there are certain differences between them. map is used to transform each element of an array, while forEach is used to run a function on each element without changing the array.
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