Parsing JSON from stdin

parsing-json-from-stdin.sh

# jq is the swiss army knife of piping JSON :)
echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | jq -r .NodeVersion

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | ruby -rjson -e 'puts JSON.parse($stdin.read).fetch("NodeVersion")'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | ruby -054ne 'puts $1 if /NodeVersion":"([^"]*)/'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | tr , \\n | sed -En '/NodeVersion/s/^.*"([[:digit:]].+)".*$/\1/p'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | awk 'BEGIN { RS=","; FS="\"" } /NodeVersion/ {print $4}'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | tr , \\n | grep NodeVersion | grep -Eo '\d+\.\d+\.\d+'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | ruby -rjson -e'puts *JSON.load($<)' | sed -n '/NodeVersion/{n;p;}'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | ruby -rjson -e'puts *JSON.load($<)' | sed '1,/NodeVersion/d' | head -1

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | tr ',:"{}' \\n | sed '1,/NodeVersion/d;/^$/d;q'

echo '{"abc":123,"NodeVersion":"7.10.1","xyz":456}' | tr -d '{}":' | tr , \\n | sed -n 's/NodeVersion//p'