Ruby - Arrays
What will be the output of this Ruby code?
arr = [1, [2, 3], [4, 5]] puts arr.flatten.include?(3)
What will be the output of this Ruby code?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Flatten the nested array
arr.flattenconverts[1, [2, 3], [4, 5]]into[1, 2, 3, 4, 5].Step 2: Check if 3 is included
include?(3)returnstruebecause 3 is in the flattened array.Final Answer:
true -> Option DQuick Check:
flatten + include? = true if element present [OK]
Quick Trick: Flatten first, then check include? for nested arrays [OK]
Common Mistakes:
MISTAKES- Not flattening before include? check
- Expecting false because 3 is nested
- Confusing include? with length
Master "Arrays" in Ruby
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