mirror of https://github.com/CrimsonTome/tldr.git
28 lines
564 B
Markdown
28 lines
564 B
Markdown
# jq
|
|
|
|
> A lightweight and flexible command-line JSON processor.
|
|
|
|
- Output JSON file:
|
|
|
|
`cat {{file}} | jq`
|
|
|
|
- Output all elements from JSON array in file, or all key-value pairs from JSON objects in file:
|
|
|
|
`cat {{file}} | jq .[]`
|
|
|
|
- Read JSON objects from file, into array, and output (inverse of `jq .[]`):
|
|
|
|
`cat {{file}} | jq --slurp`
|
|
|
|
- Output first element in JSON file:
|
|
|
|
`cat {{file}} | jq .[0]`
|
|
|
|
- Output "key" of first element in JSON file:
|
|
|
|
`cat {{file}} | jq .[0].{{key}}`
|
|
|
|
- Output "key" of each element in JSON file:
|
|
|
|
`cat {{file}} | jq 'map(.{{key}})'`
|