[Solved] What does the Ruby method map return when called on an array? — Ans: A new array with the results of running the block on each element | Ruby

Ruby - Enumerable and Collection Processing

What does the Ruby method map return when called on an array?

AA hash with keys as indices and values as elements

BThe original array modified in place

CThe number of elements in the array

DA new array with the results of running the block on each element

Step-by-Step Solution

Solution:

Step 1: Understand map
The map method applies the given block to each element of the array.
Step 2: Return value
It returns a new array containing the results of the block for each element, without modifying the original array.
Final Answer:
A new array with the results of running the block on each element -> Option D
Quick Check:
[1,2,3].map { |n| n*2 } returns [2,4,6] [OK]

Quick Trick: map returns a new transformed array [OK]

Common Mistakes:

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What does the Ruby method map return when called on an array?