jsjq

jsjq - jq with ECMAScript syntax

it uses eval() to run your code, be warned (code is checked and run using safe-eval)

Usage with npx:

npx jsjq '.data.map(x => x*2)' '{"data": [1, 2, 3]}'
# output: [2, 4, 6]

Normal usage:

npm i -g jsjq 

# from JSON string
jsjq '.data.map(x => x*2)' '{"data": [1, 2, 3]}'

# from JSON file
jsjq '.data.map(x => x*2)' example.json

Pipe usage:

echo '{"data": [1, 2, 3]}' | jsjq '.data.map(x => x*2)' 

Custom object methods (may be overridden by properties with the same name):

jsjq '.data.listKeys()' '{ "data": {"a": 1, "b": 2, "c": 3} }'
# output: [ 'a', 'b', 'c' ]

jsjq '.data.listValues()' '{ "data": {"a": 1, "b": 2, "c": 3} }'
# output: [ 1, 2, 3 ]

jsjq '.data.listEntries()' '{ "data": {"a": 1, "b": 2, "c": 3} }'
# output: [ [ 'a', 1 ], [ 'b', 2 ], [ 'c', 3 ] ]

jsjq '.data.stringify()' '{ "data": {"a": 1, "b": 2, "c": 3} }'
# output: '{"a":1,"b":2,"c":3}'

# override:
jsjq '.data.stringify()' '{ "stringify": 123 }'
# will throw an error

Custom array methods:

jsjq '.data.compact()' '{ "data": [1, 2, 2, 3] }'
# output: [ 1, 2, 3 ]

jsjq '.data.stringify()' '{ "data": [1, 2, 2, 3] }'
# output '[1,2,2,3]'

Options:

• -c, --compact-output compact instead of pretty-printed output;
• -r, --raw-output output strings without escapes and quotes;
• -i, --interactive run jsjq in interactive mode (experimental)
• -t, --type print the type of the value instead of the value itself;
• -v, --version show the version;
• -h, --help show the help;

Code check:

jsjq '.data; process.exit(1)' '{}'
# will throw an error