jq deals in filters for JSON. "." is the simplest filter which returns
everything1.
Filters allow you to access JSON information as though {..} is an
object.
.[] allows you to perform array operations. For example, getting the
third element in an array: .[3] . .[] gets all the elements in an
array.
- htmlq is a library for jq like functionality in HTML
- fq jq for binary files
- rq - record analysis and transformation (multi format)
- yq - jq for YAML
1. Bell, A. An Introduction to JQ. (2021).