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chore(kb/jq): select from list

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Michele Cereda
2024-04-01 19:03:22 +02:00
parent 8fe38aab7f
commit 30e8401b2c
1 changed files with 8 additions and 9 deletions
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17
knowledge base/jq.md
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@@ -1,10 +1,8 @@
# JQ
## Table of contents <!-- omit in toc -->
1. [TL;DR](#tldr)
1. [Further readings](#further-readings)
1. [Sources](#sources)
1. [Sources](#sources)
## TL;DR
@@ -16,7 +14,7 @@ jq 'keys' 'file.json'
jq --sort-keys '.' 'input.json' > 'output.json'
jq --sort-keys '.' 'file.json' | sponge 'file.json'
# Do not fail due to possibly missing keys.
# Avoid failure due to possibly missing keys.
# Notice the postfix operator '?'.
jq '.spec.template.spec.containers[]?.env?' 'manifest.kube.json'
@@ -62,6 +60,9 @@ jq '.extensionsGallery + {
# Merge objects from 2 files
jq '.[0] * .[1]' '1.json' '2.json'
# Only show ('select') elements which specific attribute's value is in a list.
jq '.[]|select(.PrivateIpAddress|IN("172.31.6.209","172.31.6.229"))|.PrivateDnsName'
# Add elements from arrays with the same name from other files.
jq '.rules=([input.rules]|flatten)' starting-rule-set.json ending-rule-set.json
jq '.rules=([inputs.rules]|flatten)' starting-rule-set.json parts/*.json
@@ -107,9 +108,7 @@ helm template chartName \
[jq recipes]: https://remysharp.com/drafts/jq-recipes
## Sources
All the references in the [further readings] section, plus the following:
### Sources
- [Filter objects list with regex]
- [Select multiple conditions]
@@ -117,18 +116,18 @@ All the references in the [further readings] section, plus the following:
- [jq Select range]
- [Deleting multiple keys at once with jq]
- [Remove all null values]
- [jq: select where .attribute in list]
<!--
References
-->
<!-- In-article sections -->
[further readings]: #further-readings
<!-- Others -->
[change multiple values at once]: https://stackoverflow.com/questions/47355901/jq-change-multiple-values#47357956
[deleting multiple keys at once with jq]: https://stackoverflow.com/questions/36227245/deleting-multiple-keys-at-once-with-jq
[filter objects list with regex]: https://til.hashrocket.com/posts/uv0bjiokwk-use-jq-to-filter-objects-list-with-regex
[jq select range]: https://stackoverflow.com/questions/45548604/jq-select-range
[jq: select where .attribute in list]: https://stackoverflow.com/questions/50750688/jq-select-where-attribute-in-list
[remove all null values]: https://stackoverflow.com/questions/39500608/remove-all-null-values
[select multiple conditions]: https://stackoverflow.com/questions/33057420/jq-select-multiple-conditions#33059058