shell script note

bash.md

• grep CODE_ID and extract the VALUE

echo '{"CODE_ID":"12345678","CODE_NOTE":"abcdefg","CODE_ID":"87654321"}' | grep -oP '"CODE_ID":"\K.*?(?=")'

12345678
87654321

• https://askubuntu.com/questions/1167287/parse-json-with-default-bash-only

function jsonValue() {
KEY=$1
num=$2
awk -F"[,:}]" '{for(i=1;i<=NF;i++){if($i~/'$KEY'\042/){print $(i+1)}}}' | tr -d '"' | sed -n ${num}p
}

echo '{"CODE_ID":"12345678","CODE_NOTE":"abcdefg","CODE_ID":"87654321"}' | jsonValue CODE_ID

12345678
87654321