Ruby - Enumerable and Collection Processing
Which of the following is the correct syntax to find the first even number in an array nums using find?
nums = [1, 3, 4, 6]
Which of the following is the correct syntax to find the first even number in an array nums using find?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall the block syntax for
The block must be passed with curly braces or do-end and use a block variable with pipes.findStep 2: Check each option's syntax
nums.find { |n| n.even? } uses correct block syntax:{ |n| n.even? }. Others have syntax errors.Final Answer:
nums.find { |n| n.even? } -> Option AQuick Check:
Correct block syntax = nums.find { |n| n.even? } [OK]
Quick Trick: Use curly braces and pipes for blocks with find [OK]
Common Mistakes:
- Missing pipes around block variable
- Passing condition without a block
- Using wrong arrow or syntax for block
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