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I am currently javascript developer coming from java, but advancing my knowlendge in data structures & algorithms, so in Java, C, or C++, while declaring array we need to assume its length first like so:

int[] sampleArray = new int[6];

and there are 24 bytes of memory consumed by this array, and we need this because after 24 bytes, there may be some other data type consuming following x bytes. but in javascript we do not need to set the length, and how javascript determines how much memory array will consume?

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  • In JavaScript, an array is dynamic in size and can be sparse. This question will probably lead you to a better understanding: stackoverflow.com/questions/365975/… Commented Nov 28, 2019 at 15:09
  • stackoverflow.com/questions/20321047/… Commented Nov 28, 2019 at 15:21
  • so to be sure, javascript uses Dynamic Memory Allocation right? Commented Nov 28, 2019 at 15:40
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