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How does Ruby's design help developers stay happy when writing code that manipulates collections?

hard📝 Application Q15 of 15
Ruby - Basics and Runtime
How does Ruby's design help developers stay happy when writing code that manipulates collections?
Consider this code:
numbers = [1, 2, 3, 4]
squares = numbers.map { |n| n * n }

What feature of Ruby makes this code enjoyable and clear?
ARequiring explicit loops with index counters
BDisallowing inline code blocks for clarity
CForcing verbose error handling for every operation
DUsing blocks with simple syntax for concise collection processing
Step-by-Step Solution
Solution:
  1. Step 1: Identify Ruby's block usage

    Ruby uses blocks (the code inside { }) to process collections concisely and clearly.
  2. Step 2: Understand how map works with blocks

    map applies the block to each element, returning a new array with results, making code simple and readable.
  3. Final Answer:

    Using blocks with simple syntax for concise collection processing -> Option D
  4. Quick Check:

    Blocks + map = clear, happy code [OK]
Quick Trick: Look for blocks { } simplifying collection tasks [OK]
Common Mistakes:
MISTAKES
  • Thinking explicit loops are required
  • Believing Ruby forces verbose error handling
  • Assuming inline blocks are disallowed

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