Why testing for first character skips empty lines?
0
Why does the following file reader and commented line check skip the empty lines?
while read line; do
if [ ! ${line:0:1} == "#" ]; then # leave out comments
function_call $line
fi
done < list_items.txt
bash
asked 2 days ago
Johannes Almiala
1
New contributor
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add a comment |
0
Why does the following file reader and commented line check skip the empty lines?
while read line; do
if [ ! ${line:0:1} == "#" ]; then # leave out comments
function_call $line
fi
done < list_items.txt
bash
asked 2 days ago
Johannes Almiala
1
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Quotes What's more interesting, is why[ ! == '#' ]returns false.
– Kamil Cuk
2 days ago
add a comment |
0
0
0
Why does the following file reader and commented line check skip the empty lines?
while read line; do
if [ ! ${line:0:1} == "#" ]; then # leave out comments
function_call $line
fi
done < list_items.txt
bash
asked 2 days ago
Johannes Almiala
1
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Why does the following file reader and commented line check skip the empty lines?
while read line; do
if [ ! ${line:0:1} == "#" ]; then # leave out comments
function_call $line
fi
done < list_items.txt
bash
bash
asked 2 days ago
Johannes Almiala
1
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
Johannes Almiala
1
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
Johannes Almiala
1
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
Johannes Almiala
1
asked 2 days ago
Johannes Almiala
1
1
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Johannes Almiala is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
Quotes What's more interesting, is why[ ! == '#' ]returns false.
– Kamil Cuk
2 days ago
add a comment |
2
Quotes What's more interesting, is why[ ! == '#' ]returns false.
– Kamil Cuk
2 days ago
2
2
Quotes What's more interesting, is why
[ ! == '#' ] returns false.– Kamil Cuk
2 days ago
Quotes What's more interesting, is why
[ ! == '#' ] returns false.– Kamil Cuk
2 days ago
add a comment |
1 Answer
1
active
oldest
votes
1
Behavior of skipping empty lines is caused by non-quoting bash variable, always quote when comparing strings:
while read line; do
if [ ! "${line:0:1}" == "#" ]; then # leave out comments
function_call "${line}"
fi
done < list_items.txt
Above will handle empty lines.
answered 2 days ago
Kubator
73411
add a comment |
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1
Behavior of skipping empty lines is caused by non-quoting bash variable, always quote when comparing strings:
while read line; do
if [ ! "${line:0:1}" == "#" ]; then # leave out comments
function_call "${line}"
fi
done < list_items.txt
Above will handle empty lines.
answered 2 days ago
Kubator
73411
add a comment |
1
Behavior of skipping empty lines is caused by non-quoting bash variable, always quote when comparing strings:
while read line; do
if [ ! "${line:0:1}" == "#" ]; then # leave out comments
function_call "${line}"
fi
done < list_items.txt
Above will handle empty lines.
answered 2 days ago
Kubator
73411
add a comment |
1
1
1
Behavior of skipping empty lines is caused by non-quoting bash variable, always quote when comparing strings:
while read line; do
if [ ! "${line:0:1}" == "#" ]; then # leave out comments
function_call "${line}"
fi
done < list_items.txt
Above will handle empty lines.
answered 2 days ago
Kubator
73411
Behavior of skipping empty lines is caused by non-quoting bash variable, always quote when comparing strings:
while read line; do
if [ ! "${line:0:1}" == "#" ]; then # leave out comments
function_call "${line}"
fi
done < list_items.txt
Above will handle empty lines.
answered 2 days ago
Kubator
73411
edited 2 days ago
answered 2 days ago
Kubator
73411
answered 2 days ago
Kubator
73411
answered 2 days ago
Kubator
73411
73411
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add a comment |
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2
Quotes What's more interesting, is why
[ ! == '#' ]returns false.– Kamil Cuk
2 days ago