How to increment loop variable to get next value while iterating bash arguments

Question

I need to implement the following psudo code using bash.

tmp_1=""
tmp_2=""
for var in "arg_list"
do
   if[var is eq to "str_1"]
   do
      var++ # shift the loop iter to next argument
      tmp_1 = var # assign the next string/argument to 'tmp_1' variable
   done
done

eg: if i run my bash script as follow, then the value of tmp_1 should be 'str_2'

<my_script>  str_1  str_2

I try to do this with 'shift' in bash, but it didn't work to me. how to do this implementation?

Barmar · Accepted Answer · 2020-03-01 06:27:37Z

5

Don't use a for loop. Just process $1 every time through the loop, and use shift to adjust the argument list.

while [ $# -gt 0 ]
do
    if [ "$1" = "str_1" ]
    then
        shift
        tmp_1="$1"
    fi
    shift
done

answered Mar 1, 2020 at 6:27

Barmar

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