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Release history
* jq version 1.0 was released on Sun Oct 21 2012
* jq version 1.1 was released on Sun Oct 21 2012
* jq version 1.2 was released on Thu Dec 20 2012
* jq version 1.3 was released on Sun May 19 2013
* jq version 1.4 was released on Mon Jun 9 2014
As yet unreleased features in master branch, since 1.4:
- semantics
- multiple function argument numbers for any one function name,
dispatching on number of arguments in function calls
- misc
- env builting (to access the environment)
- prebuilt jq.1 man page
New features in 1.4 since 1.3:
- command-line arguments
- jq --arg-file variable file
- jq --unbuffered
- jq -e / --exit-status (set exit status based on outputs)
- jq -S / --sort-keys (now jq no longer sorts object keys by
default
- syntax
- .. -> like // in XPath (recursive traversal)
- question mark (e.g., .a?) to suppress errors
- ."foo" syntax (equivalent to .["foo"])
- better error handling for .foo
- added % operator (modulo)
- allow negation without requiring extra parenthesis
- more function arguments (up to six)
- filters:
- any, all
- iterables, arrays, objects, scalars, nulls, booleans, numbers,
strings, values
- string built-ins:
- split
- join (join an array of strings with a given separator string)
- ltrimstr, rtrimstr
- startswith, endswith
- explode, implode
- fromjson, tojson
- index, rindex, indices
- math functions
- floor, sqrt, cbrt, etetera (depends on what's available from libm)
- libjq -- a C API interface to jq's JSON representation and for
running jq programs from C applications
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