[Solved] You want to compose three Procs:p1 = Proc.new { |x| x + 1 } p2 = Proc.new { |y| y * 2 } p3 = Proc.... | Ruby

Ruby - Functional Patterns in Ruby

You want to compose three Procs:

p1 = Proc.new { |x| x + 1 }
p2 = Proc.new { |y| y * 2 }
p3 = Proc.new { |z| z - 3 }

Which expression correctly composes them so the input is first processed by p1, then p2, then p3?

Ap1 >> p2 >> p3

Bp3 >> p2 >> p1

Cp3 << p2 << p1

Dp1 << p2 << p3

Step-by-Step Solution

Solution:

Step 1: Understand chaining multiple Procs
Composition is left to right: p1 >> p2 >> p3 applies p1, then p2, then p3.
Step 2: Verify other options
Options with << reverse order or wrong chaining.
Final Answer:
p1 >> p2 >> p3 -> Option A
Quick Check:
Chain Procs left to right with >> [OK]

Quick Trick: Use >> repeatedly to chain multiple Procs [OK]

Common Mistakes:

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