ifs Questions
4
Solved
Bash seems to behave unpredictably in regards to temporary, per-command variable assignment, specifically with IFS.
I often assign IFS to a temporary value in conjunction with the read command. I ...
1
since the default value of the IFS variable is a newline/tab/space, the following code:
while read -r line
do
echo $line
done <<< "hello\nworld"
outputs:
hello
world
but, if ...
3
Solved
How to make my ARRAYFORMULA(A1 + something else) to stop producing results after there are no more values in A1 column, eg. to skip blank values. By default it gives endlessly "something else&...
Isochronism asked 5/1, 2022 at 18:23
4
Solved
I'm trying to use for in the shell to iterate over filenames with spaces. I read in a stackoverflow question that IFS=$'\n' could be used and that seems to work fine. I then read in a comment to on...
7
Solved
If the following example, which sets the IFS environment variable to a line feed character...
IFS=$'\n'
What does the dollar sign mean
exactly?
What does it do in this specific
case?
Where can ...
Mayday asked 8/11, 2010 at 21:26
3
~ ls
A B C
On bash (looks wrong)
~IFS=$'\x00' read -a vars < <(find -type f -print0); echo "${vars}"
ABC
On zsh (looks good)
~IFS=$'\x00' read -A vars < <(find -type f -print0); e...
1
Solved
I've encountered a strange problem after temporarily changing IFS for the purpose of array building:
$ echo "1 2 3" |while read myVar1 myVar2; do echo "myVar1: ${myVar1}"; echo ...
3
Solved
If you have a string with a delimiter, let's say a , character, you could use IFS just like that:
text=some,comma,separated,text
IFS="," read -ra ADDR <<< "$text"
for i in ${ADDR[@]}
do
...
1
Solved
Experiment 1
Here is my first script in file named foo.sh.
IFS=:
for i in foo:bar:baz
do
echo $i
done
This produces the following output.
$ bash foo.sh
foo bar baz
Experiment 2
This is my ...
2
Solved
I would like to split string contains \r\n in bash but carriage return and \n gives issue. Can anyone give me hint for different IFS? I tried IFS=' |\' too.
input:
projects.google.tests.inbox.doc...
2
This is my code to loop over colon separated values and do something
with each value.
f()
{
IFS=:
for arg in $1
do
echo arg: $arg
done
}
f foo:bar:baz
This works fine in most POSIX complia...
2
Solved
How to convert array elements with single quotes and comma in Bash.
arr=("element1" "element2" "element3")
#element1 element2 element3
Desired result
'element1','element2','element3'
From Marti...
1
Solved
I'm going through a Bash tutorial, and specifically the subject of word splitting.
This script, called "args", helps demonstrate word splitting examples:
#!/usr/bin/env bash
printf "%d args:" $#
...
Glory asked 1/4, 2017 at 23:54
2
Solved
I thought setting IFS to $'\n' would help me in reading an entire file into an array, as in:
IFS=$'\n' read -r -a array < file
However, the above command only reads the first line of the file...
3
Solved
On my GNU bash, version 4.3.42(1)-release I am doing some tests to answer a question. The idea is to split a :-separated string and and each of its elements into an array.
For this, I try to set t...
3
Solved
I've been surprised with the line marked (!!) in the following example:
log1 () { echo $@; }
log2 () { echo "$@"; }
X=(a b)
IFS='|'
echo ${X[@]} # prints a b
echo "${X[@]}" # prints a b
echo ${X...
1
Solved
I'm learning bash and I saw this construction:
cat file | while IFS= read -r line;
do
...
done
Can anyone explain what IFS= does? I know it's input field separator, but why is it being set to n...
2
Solved
I am trying to split a string in BASH based on 2 delimiters - Space and the \. This is the string:-
var_result="Pass results_ADV__001__FUNC__IND\ADV__001__FUNC__IND_08_06_14_10_04_34.tslog"
I w...
2
Solved
I'm trying to split a string into two variables (without having to use a while loop):
var="hello:world"
IFS=':' read var1 var2 <<< $var
echo "var1: $var1"
echo "var2: $var2"
but i'm no...
2
Solved
I have a text file which contains text lines separated by an empty line of text. I want to push the content of that file into an array, and use the empty line as a separator. I tried IFS="\n" (or "...
1
Solved
Let's say I execute this script via a cronjob:
IFS=$'\n'
for i in `cat "$1"`; do
echo "$i" >> xtempfile.tmp;
done
It works fine without causing any issues. But when I run this in a termi...
3
Solved
I'm bored, and decided to write a script for a text-based adventure of mine using bash. Basically, it's supposed to animate a typewriter in certain cases for dramatic storytelling. I can do this ma...
1
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