Bash array to JSON array

Question

I want to print all the string in the array delimited with comma

#! /bin/bash
clear
echo -e "Enter the list of hosts to print statement:\n"
readarray hosts

echo "======================================================="
echo -e "Enter the list to print"
echo "======================================================="

for i in ${hosts[@]}
do
 id="${i[@]}";echo [ ${i// /, } ]
echo $id
done

If these inputs

afrid.google.com
farid.google.com

My expected results is

[ "afrid.google.com", "farid.google.com" ]

But My result is

[ farid.google.com ]
farid.google.com
[ farid.google.com ]
farid.google.com

could you please share what should i have to fill in ?? field — mohamed afrid
– mohamed afrid, Commented Apr 15, 2019 at 18:41
You don't put it in the ?? field. See the answer that someone posted. — Barmar
– Barmar, Commented Apr 15, 2019 at 18:43
you have 2 echo statements inside of your loop, of course you're getting 2 lines of output for each line of input! ;-) . Good luck! — shellter
– shellter, Commented Apr 15, 2019 at 19:59

oguz ismail · Accepted Answer · 2022-05-24 19:06:03Z

4

Use jq.

$ jq -Rc '. / " "' <<< ${hosts[*]}
["afrid.google.com","farid.google.com"]

edited May 24, 2022 at 19:06

answered Apr 15, 2019 at 18:41

oguz ismail

51.8k16 gold badges64 silver badges83 bronze badges

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

Comments

Mike Q · Accepted Answer · 2019-04-15 18:59:21Z

0

A non jq answer, basically feeding the array through printf command with our formatting included (e.g. quotes and comma, then removing the the last chars from the string in the next command) :

hosts_str=$( printf '"%s", ' "${hosts[@]}" )
hosts_str="[ ${hosts_str: : -2} ]"
echo $hosts_str

answered Apr 15, 2019 at 18:59

Mike Q

7,4855 gold badges62 silver badges69 bronze badges

2 Comments

mohamed afrid Over a year ago

Showing this error @mike afri.sh: line 14: -2: substring expression < 0

mohamed afrid Over a year ago

But when I try this it results the expected but with this exception, Could you advise on this hosts_str=$( printf '"%s", ' "${hosts[@]}" ) hosts_str="[ ${hosts_str} ]" echo $hosts_str Result [ "afrid.google.com ", "farid.google.com ", ] [ "afrid.google.com ", "farid.google.com ", ]

Collectives™ on Stack Overflow

Bash array to JSON array

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related