Bash Scripting - String Operations
What does the expression
${var/old/new} do in bash scripting?What does the expression ${var/old/new} do in bash scripting?
easy🧠 Conceptual Q11 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the syntax ${var/old/new}
This syntax replaces only the first occurrence of the substring 'old' with 'new' inside the variable 'var'.Step 2: Differentiate from ${var//old/new}
The double slash version replaces all occurrences, but the single slash replaces only the first one.Final Answer:
Replaces the first occurrence of 'old' with 'new' in the variable 'var'. -> Option BQuick Check:
Single slash means first occurrence only [OK]
Quick Trick: Single slash replaces first match only, double slash replaces all [OK]
Common Mistakes:
MISTAKES- Confusing single slash with double slash for all replacements
- Thinking it deletes or appends instead of replacing
- Assuming it works on strings outside variables
Master "String Operations" in Bash Scripting
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