Ruby - Functional Patterns in Ruby
What will this Ruby code output?
def concat(str1, str2)
str1 + str2
end
result = concat("Hi, ", "Ruby!")
puts resultWhat will this Ruby code output?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze function behavior
The function concatenates two strings using + operator.Step 2: Evaluate function call and output
concat("Hi, ", "Ruby!") returns "Hi, Ruby!" which is printed by puts.Final Answer:
Hi, Ruby! -> Option DQuick Check:
Pure function returns combined string [OK]
Quick Trick: String + operator joins strings without side effects [OK]
Common Mistakes:
- Expecting partial string output
- Confusing concatenation with printing
- Assuming error due to missing return keyword
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