Ruby - Arrays
Which of the following is the correct syntax to slice the first 4 elements from an array
arr in Ruby?Which of the following is the correct syntax to slice the first 4 elements from an array arr in Ruby?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Identify indices for first 4 elements
Indices start at 0, so first 4 elements are at indices 0, 1, 2, 3.Step 2: Choose range that includes indices 0 to 3
arr[0...4] excludes index 4, selecting indices 0, 1, 2, 3 exactly.Final Answer:
arr[0...4] -> Option BQuick Check:
Use 0...4 to get first 4 elements (indices 0 to 3) [OK]
Quick Trick: Use 0...n to get first n elements [OK]
Common Mistakes:
- Starting index at 1 instead of 0
- Using .. which includes one extra element
- Confusing inclusive and exclusive ranges
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