Today I Learned

hashrocket A Hashrocket project

Object construction with jq

jq is a powerful command-line tool to help you parse, analyze and script json output.

My current problem in jq is to turn this:

  "modules": [
    "name": "x",
    "size": 10
    "name": "y",
    "size": 20

into this:

{x: 10}
{y: 20}

This is possible using object construction:

jq '.modules[] | {(.name): .size}'

You pipe the result of the initial attribute as an array syntax .modules[] to an object {}. To use an attribute as a key you put parens around the attribute (.name) and declare that the value should be a different attribute .size.

Read more in the jq docs