[Solved] Which Ruby code correctly uses times to build an array containing the cubes of numbers from 0 to 4? — Ans: arr = [] 5.times { |i| arr << i**3 } | Ruby

Ruby - Loops and Iteration

Which Ruby code correctly uses times to build an array containing the cubes of numbers from 0 to 4?

Aarr = 5.times.map { |i| i * 3 }

Barr = [] 5.times { |i| arr << i**3 }

Carr = [] 5.times { |i| arr.push(i * i) }

Darr = (0..4).times { |i| i**3 }

Step-by-Step Solution

Solution:

Step 1: Understand the goal
Create an array of cubes from 0 to 4.
Step 2: Analyze options
arr = [] 5.times { |i| arr << i**3 } initializes an empty array and appends i cubed for each iteration from 0 to 4.
Step 3: Check other options
arr = 5.times.map { |i| i * 3 } uses map incorrectly on times (times returns integer, not enumerable). arr = [] 5.times { |i| arr.push(i * i) } pushes squares, not cubes. arr = (0..4).times { |i| i**3 } tries to call times on a range, which is invalid.
Final Answer:
arr = [] 5.times { |i| arr << i**3 } -> Option B
Quick Check:
Use times with block and append computed values [OK]

Quick Trick: Use times with block and append results to array [OK]

Common Mistakes:

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Which Ruby code correctly uses times to build an array containing the cubes of numbers from 0 to 4?