Bash Scripting - File Operations in Scripts
You want to read a file line by line and skip empty lines. Which script snippet correctly does this?
You want to read a file line by line and skip empty lines. Which script snippet correctly does this?
hard🚀 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand skipping empty lines
We need to check if the line is not empty using[[ -n $line ]].Step 2: Confirm reading and condition
while IFS= read -r line; do if [[ -n $line ]]; then echo "$line"; fi; done < file.txt reads lines safely and prints only non-empty lines inside the loop.Final Answer:
while IFS= read -r line; do if [[ -n $line ]]; then echo "$line"; fi; done < file.txt -> Option BQuick Check:
Condition inside loop filters empty lines = A [OK]
Quick Trick: Use
if [[ -n $line ]] inside loop to skip empty lines [OK]Common Mistakes:
MISTAKES- Using external grep after loop (may lose variable scope)
- Not checking for empty lines inside the loop
- Using unnecessary cat command
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