jq to nushell idioms about nushell.github.io HOT 8 CLOSED

Here is another one.

How do I extract the keys from a data structure?

jq

echo '{"source": "./", "dest": "~/"}' | jq 'keys'

nu (as of 0.41.0)

echo '{"source": "./", "dest": "~/"}' | from json | get

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@Shackelford-Arden thanks for fiddling a solution!

Perhaps a new directory in https://github.com/nushell/nu_scripts could house some of these idioms.

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I have one example here: Download all tarballs of an NPM package

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I imagine those examples should live in https://github.com/nushell/nu_scripts. Then a writer could author a tutorial referencing those high-quality sources.

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Another example I came across: how do I delete a key from a JSON value?
Consider programmatically removing a development dependency from a package.json.
Using jq:

jq 'del(.devDependencies.husky)' < package.json

For nu I wasn't sure how to do this. open package.json | update devDependencies and then what 😄 ?

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@efx - the current way seems to be:

open Cargo.toml | update dev-dependencies { echo $it.dev-dependencies | reject ansi_term }

But I think we could make reject take in a path, so you could reject something deeper in the table.

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@jonathandturner thank you! I'll add that to my ever expanding nu knowledge.

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@efx Happened upon this and thought that I'd note that your example using 0.41.0 doesn't seem to work anymore (running 0.68.1 here).

Running what you have above using 0.68.1 I get the following:

I played around a bit though and while not as elegant as jq 'keys' it does give similar results:

echo '{"source": "./", "dest": "~/"}' | from json | transpose | get column0

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