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String regular expression

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# 1  
Old 06-27-2013
String regular expression
Hi,

Code:
temp="/usr=25,/usr/lib=12"

How to get only dir names with out values.

I tried like below but no use.

Code:
tmp=${temp##*,}
echo $tmp

o/p:
Code:
/usr/lib=12


expected o/p:
/usr /usr/lib ---> in array
Last edited by Scrutinizer; 06-27-2013 at 01:19 PM.. Reason: code tags
# 2  
Old 06-27-2013
In bash, try:
Code:
IFS=, read -a ARR <<< "$temp"
printf "%s\n" "${ARR[@]%=*}"

# 3  
Old 06-27-2013
In awk you could do:

Code:
awk -F\= '{print $1}' INfile >> OUTfile

# 4  
Old 06-27-2013
Quote:
Originally Posted by dagamier
awk -F\= '{print $1}' INfile >> OUTfile
I don't understand how this awk code is going to help solve OP's problem.

Another approach to get required values into an indexed array would be:
Code:
temp="/usr=25,/usr/lib=12"

typeset -a arr
typeset -i idx

for key in ${temp/,/ }
do
        arr[$idx]="${key/=*/}"
        (( idx++ ))
done

printf "%s\n" "${arr[@]}"

# 5  
Old 06-27-2013
Quote:
Originally Posted by Scrutinizer
In bash, try:
Code:
IFS=, read -a ARR <<< "$temp"
printf "%s\n" "${ARR[@]%=*}"

Hi,

Thanks for the solution.

When I try to apply the code to read a file. I am not getting the proper output.

readfile
Code:
temp=/usr=25,/usr/lib=12
bin=12 
etc=45 
lib=12:6

output should be
Code:
echo $temp
/usr /usr/lib

echo $bin
12

echo $etc
45

echo $lib
12:6

Can we get like above.
# 6  
Old 06-27-2013
Those are different requirements than what is in post #1. Please specify more clearly what it is you are trying to achieve..
# 7  
Old 06-27-2013
Quote:
Originally Posted by Yoda
I don't understand how this awk code is going to help solve OP's problem.

Another approach to get required values into an indexed array would be:
Code:
temp="/usr=25,/usr/lib=12"

typeset -a arr
typeset -i idx

for key in ${temp/,/ }
do
        arr[$idx]="${key/=*/}"
        (( idx++ ))
done

printf "%s\n" "${arr[@]}"




Hi,

I tried this logic to read a file and get t he values but no use.

Code:
function read_params()
{
    until [ -z "$1" ]
    do
      if [ `expr index "$1" =` != 0 ] ; then
          tmp=$1

          typeset -a arr
          typeset -i idx
          parameter=${tmp%%=*}
          for key in ${tmp/,/ }
          do
             arr[$idx]="${key/=*/}"
             value="${arr[@]}"
             (( idx++ ))
             eval $parameter=\"$value\"
           done
      fi
      shift
    done
}

function main()
{
read_params `cat readfile.txt`

echo $temp
echo $bin
echo $lib
}

main

readfile.txt
Code:
temp=/usr=25,/usr/lib=12
bin=12 
etc=45 
lib=12:6

output:
Code:
/usr /usr/lib
12
12:6

please let me know what went wrong in my code

---------- Post updated at 02:45 AM ---------- Previous update was at 01:33 AM ----------

Quote:
Originally Posted by Scrutinizer
Those are different requirements than what is in post #1. Please specify more clearly what it is you are trying to achieve..
Hi,

Please find the above post for more details.
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