[Solved] What happens if a Ruby regex character class contains duplicate characters, like /[abcabc]/? — Ans: Duplicates are ignored; class matches a, b, or c | Ruby

Ruby - Regular Expressions

What happens if a Ruby regex character class contains duplicate characters, like /[abcabc]/?

ADuplicates cause the class to match twice as often

BRegex raises a syntax error

CDuplicates are ignored; class matches a, b, or c

DOnly the first occurrence of each character is matched

Step-by-Step Solution

Solution:

Step 1: Understand character class behavior with duplicates
In Ruby regex, duplicate characters inside [] are ignored; the class matches any unique character listed.
Step 2: Confirm no error or special behavior
The regex /[abcabc]/ behaves the same as /[abc]/, matching a, b, or c without error or frequency change.
Final Answer:
Duplicates are ignored; class matches a, b, or c -> Option C
Quick Check:
Duplicate chars in [] are ignored [OK]

Quick Trick: Duplicate chars in [] don't affect matching [OK]

Common Mistakes:

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What happens if a Ruby regex character class contains duplicate characters, like /[abcabc]/?