Ruby - Functional Patterns in Ruby
Which of the following is the correct syntax to compose two Procs
p1 and p2 in Ruby?Which of the following is the correct syntax to compose two Procs p1 and p2 in Ruby?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall correct Proc composition operator
The operator to compose Procs is>>, which is written as>>but in Ruby code it is>>(two greater-than signs).Step 2: Check each option
combined = p1 >> p2 uses>>correctly. combined = p1 >>> p2 uses three > which is invalid. combined = p1 << p2 uses << which is not for composition. combined = p1 >> p2.call callsp2immediately, which is wrong.Final Answer:
combined = p1 >> p2 -> Option AQuick Check:
Proc composition syntax = p1 >> p2 [OK]
Quick Trick: Use exactly two > signs to compose Procs [OK]
Common Mistakes:
- Using >>> instead of >>
- Using << instead of >>
- Calling Proc instead of composing
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