Awk command result into array

Question

i've a text file who contains this :

Hello 4
Bye 2
Toto 2

And i want to put the first string of each lines into MyArray1, and the integer into another one MyArray2.

I wrote this, but it doesn't work.

#!/bin/bash

countline=$(awk '{ print $1 }'  test | wc -l)


for ((i=0; i<$countline ;i=i+1))

    do

        MyArray1[$i]=awk '{ print $1 }'  test
done


for ((i=0; i<$countline ;i=i+1))

    do

        MyArray2[$i]=awk '{ print $2 }'  test
done

Please help me.

Note, this is simpler and faster: countline=$(wc -l < test) — glenn jackman
– glenn jackman, Commented Jul 9, 2013 at 20:14

jaypal singh · Accepted Answer · 2013-07-09 19:40:34Z

4

This would do it:

while read -r f1 f2; do 
    ary1+=("$f1")
    ary2+=("$f2")
done < file

$ printf "%s\n" "${ary1[@]}"
Hello
Bye
Toto

$ printf "%s\n" "${ary2[@]}"
4
2
2

Or you can use cut

arryone=( $(cut -d ' ' -f1 file) )
arrytwo=( $(cut -d ' ' -f2 file) )

answered Jul 9, 2013 at 19:40

jaypal singh

77.6k24 gold badges108 silver badges147 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

chepner Over a year ago

Just to point out how odd bash arrays are, the following works, too: while read -r ary1[i] ary2[i]; do (( i++ )); done (as long as i is 0 or unset to begin with).

jaypal singh Over a year ago

Ahh @chepner now that is beautiful! Thank you, I didn't know that.

twalberg Over a year ago

+1 for a solution that only reads through the file once... and with no extra external processes...

anubhava · Accepted Answer · 2013-07-09 19:35:55Z

2

Keep it simple:

MyArray1=( $(awk '{ print $1 }' test) )
MyArray2=( $(awk '{ print $2 }' test) )

You don't need to iterate and loop on awk's output and can directly create your arrays as shown above.

answered Jul 9, 2013 at 19:35

anubhava

790k67 gold badges603 silver badges671 bronze badges

Collectives™ on Stack Overflow

Awk command result into array

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related