Ruby - Basics and Runtime
Given a nested array, how do you flatten it into a single array in Ruby?
Given a nested array, how do you flatten it into a single array in Ruby?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Identify method to flatten arrays
flatten returns a new array with all nested arrays merged into one.Step 2: Check other methods
join converts to string, compact removes nils, reduce combines elements but not flatten.Final Answer:
Use array.flatten -> Option CQuick Check:
Flatten nested arrays with flatten method [OK]
Quick Trick: Use flatten to convert nested arrays to single array [OK]
Common Mistakes:
MISTAKES- Using join which returns string
- Using compact which removes nils
- Confusing reduce with flatten
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