[Solved] What is the main difference between sub and gsub methods in Ruby? — Ans: sub replaces only the first match, gsub replaces all matches. | Ruby

Ruby - String Operations

What is the main difference between sub and gsub methods in Ruby?

A<code>sub</code> replaces all matches, <code>gsub</code> replaces only the first match.

B<code>sub</code> replaces only the first match, <code>gsub</code> replaces all matches.

C<code>sub</code> deletes matches, <code>gsub</code> adds new text.

D<code>sub</code> works only on arrays, <code>gsub</code> works on strings.

Step-by-Step Solution

Solution:

Step 1: Understand sub behavior
sub replaces only the first occurrence of the pattern in the string.
Step 2: Understand gsub behavior
gsub replaces all occurrences of the pattern in the string.
Final Answer:
sub replaces only the first match, gsub replaces all matches. -> Option B
Quick Check:
sub = first match, gsub = all matches [OK]

Quick Trick: Remember: sub = single replace, gsub = global replace [OK]

Common Mistakes:

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