[Solved] Why does "a,b,a".split(',').join('-') produce "a-b-a" and not remove duplicate elements? — Ans: split and join do not remove duplicates; they only split and combine strings | Ruby

Ruby - String Operations

Why does "a,b,a".split(',').join('-') produce "a-b-a" and not remove duplicate elements?

Asplit and join do not remove duplicates; they only split and combine strings

Bsplit automatically removes duplicates but join adds them back

Cjoin removes duplicates but split adds them

DRuby strings cannot have duplicates removed

Step-by-Step Solution

Solution:

Step 1: Understand split behavior
split divides the string into parts but keeps all elements including duplicates.
Step 2: Understand join behavior
join combines array elements in order without removing duplicates.
Final Answer:
split and join do not remove duplicates; they only split and combine strings -> Option A
Quick Check:
split/join preserve duplicates, no removal [OK]

Quick Trick: Split and join do not filter duplicates [OK]

Common Mistakes:

Master "String Operations" in Ruby

9 interactive learning modes - each teaches the same concept differently

More Ruby Quizzes

Why does "a,b,a".split(',').join('-') produce "a-b-a" and not remove duplicate elements?