1. Is .map and .filter pure functions ? 2. What should not be blocked in Node.js ? 3. Is For.. in.. loop for iterating through object or arrays ?

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1. Yes, .map and .filter are pure functions. 2. Network calls should not be blocked in Node.js. 3. For..in.. loop is for iterating through objects.

  • 1. Yes, .map and .filter are pure functions as they d...read more

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