[Solved] Why does calling flatten on an array not change the original array in Ruby? — Ans: Because flatten returns a new array and does not modify the original | Ruby

Ruby - Arrays

Why does calling flatten on an array not change the original array in Ruby?

ABecause flatten only works on strings, not arrays

BBecause flatten returns a new array and does not modify the original

CBecause flatten modifies the original array in place

DBecause flatten requires a block to modify the array

Step-by-Step Solution

Solution:

Step 1: Understand flatten behavior
The flatten method returns a new array with nested arrays merged but does not change the original array.
Step 2: Differentiate from flatten!
flatten! modifies the original array, but flatten returns a new one.
Final Answer:
Because flatten returns a new array and does not modify the original -> Option B
Quick Check:
flatten returns new array, original unchanged [OK]

Quick Trick: Use flatten! to modify original, flatten returns new array [OK]

Common Mistakes:

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