Could you add working example of sub usage in the documentation?
I tried tests from tests/all.test and wrote some even simpler, but I always get sub is not defined, even with this:
.[] | sub(","; ":")
["a,b,c", "d,e,f"]
damirda
All 7 comments
@damirda - Unfortunately the online manual documents some features that were only added after the release of jq 1.4. To use sub you will need to install a more recent version -- I would suggest anything after Oct 6 2014. Please see the Download page (http://stedolan.github.io/jq/download); additional notes are available on the jq wiki at https://github.com/stedolan/jq/wiki/Installation
Please note that the substrate of sub and gsub is taken from the input, and so:
$ jq -n '"abc" | sub("a"; "A")'
"Abc"
There are some additional notes at
https://github.com/stedolan/jq/wiki/FAQ#support-for-regular-expressions
pkoppstein
on 11 Feb 2015
866 will make it easier to find documentation for released versions instead of looking at documentation for the upcoming release.
dtolnay
on 25 Jul 2015
I'm having trouble extending your example to something that reads from stdin. e.g. what am I doing wrong here?
$ jq '.key |= sub("a", "A")' <<< '{"key":"abc"}'
jq: error: sub/1 is not defined at <top-level>, line 1:
.key |= sub("a", "A")
jq: 1 compile error
daurnimator
on 15 Mar 2019
You have fallen in the main trap in jq: the comma IS NOT an arguments separator in function calls.
Allways use the semi-colon!
fadado
on 15 Mar 2019
@fadado doh! thanks.
daurnimator
on 15 Mar 2019
Has anyone a reshuffeling sample with multiple regex matches?
chatelao
on 24 Nov 2019
The jq FAQ has this example, which illustrates a technique which could be used for "shuffling":
$ jq -n '"abc" | sub( "(?<head>^.)(?<tail>.*)"; "\(.head)-\(.tail)")'
"a-bc"
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Most helpful comment
You have fallen in the main trap in jq: the comma IS NOT an arguments separator in function calls.
Allways use the semi-colon!