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learnbyexample@programming.dev to Linux@lemmy.mlEnglish · 1 day ago

Mastering jq

codefaster.substack.com

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Mastering jq

codefaster.substack.com

learnbyexample@programming.dev to Linux@lemmy.mlEnglish · 1 day ago
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Mastering JQ: Part 1
codefaster.substack.com
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This is the first part of an ongoing series on mastering jq. jq is a valuable tool that every fast coder has in their tool chest. It contains depths of immense power. In part 1, we'll start off with the basics.
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  • ArseAssassin@sopuli.xyz
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    10 hours ago

    I don’t know if we should call someone a master of jq if they do

    echo ‘{“k1”: [{“k2”: [9]}]}’ | jq ‘.k1 | .[0] | .k2 | .[0]’

    Instead of just

    echo ‘{“k1”: [{“k2”: [9]}]}’ | jq ‘.k1[0].k2[0]’

  • h4x0r@lemmy.dbzer0.com
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    1 day ago

    The first step to mastery is RTFM: https://jqlang.org/manual/

    • cerement@slrpnk.net
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      1 day ago

      oh hey, a project that actually has a manual to read

      • h4x0r@lemmy.dbzer0.com
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        1 day ago

        https://www.gnu.org/software/gawk/manual/gawk.html#Undocumented

  • MRIG@slrpnk.net
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    1 day ago

    If you’re going to use jq to manipulate JSON I’d recommend a helper CLI tool like ijq. It allows you to experiment without needing too lines in your terminal history.

  • gramgan@lemmy.ml
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    1 day ago

    I’m curious if anyone else has considered using nushell for these things? Probably not for everything (or to replace one’s shell) but it definitely is simpler for basic tasks.

    • slackness@lemmy.ml
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      1 day ago

      That’s the primary value offer of nushell so at least people who made it considered it I’d say.

  • FishFace@lemmy.world
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    1 day ago

    I asked an LLM to write a jq scriptlet for me today. It wasn’t even complicated, it just beat working it out/trying to craft the write string to search Stackoverflow for.

    • Beej Jorgensen@lemmy.sdf.org
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      1 day ago

      I tried and failed to get an LLM to write jq code to do a regex based matcher for finding if one json object was a subset of another.

      Gave up and learned it enough to get it going. jq is nutso powerful.

      • FishFace@lemmy.world
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        1 day ago

        I don’t understand how regex comes into it? Sounds tricky though!

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