I need to create a tool to tokenize an input list. I would be providing a text file containing a list of subdomains in the following manner:
abc.xyc.kkk.com
hjk.pol.lll.kkk.com
...
And the output need to be :
abc
xyz
kkk
hjk
...
The delimiter is '.'
I have tried out the following code, which does not seem to be working:
#!/bin/bash
STRING= cat $1
IFS='.' read -ra VALUES <<< "$STRING"
## To print all values
for i in "${VALUES[@]}"; do
echo $i
done
Your script had some mistakes that I corrected. Now it works :
#!/bin/bash
STRING='
abc.xyc.kkk.com hjk.pol.lll.kkk.com
'
IFS=' ' read -d '' -a VALUES <<< "$STRING"
for i in ${VALUES[@]}; do
echo "$i" | sed 's/\./ /g'
done
Output
abc xyc kkk com
hjk pol lll kkk com
By the way, if you want to have each token in the array, instead of the entire url, you can do this :
#!/bin/bash
STRING='
abc.xyc.kkk.com hjk.pol.lll.kkk.com
'
IFS='.' read -d '' -a VALUES <<< "$STRING"
for i in ${VALUES[@]}; do
echo "$i" | sed 's/\./ /g'
done
Output
abc
xyc
kkk
com
hjk
pol
lll
kkk
com
Let me know if it works!
"${VALUES[@]}", or else it has all the bugs of ${VALUES[*]}.${i//./ } than sed.Something like in awk can do the work:
awk 'BEGIN {FS="."; RS=" "} {$NF=""} 1'
Here is the test:
$ echo abc.xyc.kkk.com hjk.pol.lll.kkk.com |awk 'BEGIN {FS="."; RS=" "} {$NF=""} 1'
abc xyc kkk
hjk pol lll kkk
.comomitted – is it becausecomis in blacklist or simply becausecomis the last token in the current whitespace-free block? Also, I assume….xyc.…→… xyz …is a typo – you may want to fix that. Please edit your question using the grey edit button below your question.STRING= cat $1is a duplicate of Why does a space in a variable assignment give an error in bash?, and How do I set a variable to the output of a command in bash?.