How to split the string into two separate variables in shell

Question

I have an array of strings with the following numbers in it separated by a space.

I want to separate each value as an integer and put the in a separate array like array2 = [S0,42, 4677,S10, 4719, 1266, 6020, 3618, 9667, 843].

What I have done is loop through the array like the solution given here

How to split one string into multiple strings separated by at least one space in bash shell?

for each element of the array but it doesn't seem to work.

for each in ${my_array[1]}
do
echo $each
done

always gives me the output 42 4677 as a single value.

EDITED

for each in ${my_array[@]}
do
echo $each 
done    

declare -a array2
for each in ${my_array[@]}
do
    array2=$each
done 

echo ${array2[1]}

declare -p my_array

Now the first for loop works correctly but now when I assign the values of my_array to array2 in the second loop, only the last value of the last string is assigned to it i.e. 8463.

The contents of declare -p my_array are declare -a my_array='([0]="S0 [" [1]="42 4677" [2]="S10 [" [3]="4719 1266" [4]="6020 3618" [5]="9667 8463")'

@anubhava the output of the `my_array` is `S0 [` `42 4677` `S10 [` `4719 1266` `6020 3618` `9667 8463` — Saad, Aug 24 '17 at 06:26
@MarkSetchell `${my_array[@]` works. But I get a `array2: command not found` error when I use the same for loop to assign the values to the new array. — Saad, Aug 24 '17 at 06:41
Please click `edit` under your original question and update it there rather than in comments which are hard to read. Please also be sure to answer @anubhava 's question and include whatever `array2` is. — Mark Setchell, Aug 24 '17 at 06:45
@MarkSetchell I have edited my original question. Kindly go through it again. — Saad, Aug 24 '17 at 07:04
@anubhava I have answered your question in the original post. — Saad, Aug 24 '17 at 07:04
Try `array2+="$each"`. Also, enclose in double quotes `"${my_array[@]}"` — Mark Setchell, Aug 24 '17 at 07:13
@MarkSetchell all the contents are now stored in a single string like `array2='([0]="S0 [42 4677S10 [4719 12666020 36189667 8463")'` — Saad, Aug 24 '17 at 07:23

score 1 · Accepted Answer · answered Aug 24 '17 at 07:34

You can use:

declare -a my_array='([0]="S0 [" [1]="42 4677" [2]="S10 [" [3]="4719 1266" [4]="6020 3618" [5]="9667 8463")'

array2=()

for i in ${my_array[@]}; do
   [[ $i == *[0-9]* ]] && array2+=($i)
done

# check content of array2
declare -p array2
declare -a array2=([0]="S0" [1]="42" [2]="4677" [3]="S10" [4]="4719" [5]="1266" [6]="6020" [7]="3618" [8]="9667" [9]="8463")

How to split the string into two separate variables in shell

1 Answers1