[Solved] How can you fix this Ruby code so each lambda remembers its own value of idx even after the loop?lambdas = [] idx = 0 3.times do lambdas | Ruby

Ruby - Blocks, Procs, and Lambdas

How can you fix this Ruby code so each lambda remembers its own value of idx even after the loop?

lambdas = []
idx = 0
3.times do
  lambdas << lambda { idx }
  idx += 1
end
lambdas.each { |l| puts l.call }

AReplace lambda with Proc.new without changes

BDeclare idx as a global variable

CCall lambdas inside the loop instead of after

DUse a block parameter to capture idx: <code>3.times do |i| lambdas << lambda { i } end</code>

Step-by-Step Solution

Solution:

Step 1: Identify problem
Lambdas capture idx by reference, so all return final idx value (3).
Step 2: Use block parameter
Using 3.times do |i| ... captures i by value each iteration.
Step 3: Modify code
Change to 3.times do |i| lambdas << lambda { i } end so each lambda remembers its own i.
Final Answer:
Use a block parameter to capture idx: 3.times do |i| lambdas << lambda { i } end -> Option D
Quick Check:
Block parameters create new variable scope per iteration [OK]

Quick Trick: Use block parameters to capture loop variable per iteration [OK]

Common Mistakes:

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How can you fix this Ruby code so each lambda remembers its own value of idx even after the loop?