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38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
---
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syntax: markdown
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tags: [tldr, common]
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source: https://github.com/tldr-pages/tldr.git
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---
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# jello
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> A JSON processor using Python syntax.
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> More information: <https://github.com/kellyjonbrazil/jello#usage>.
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- Pretty-print JSON or JSON-Lines data from `stdin` to `stdout`:
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`cat {{file.json}} | jello`
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- Output a schema of JSON or JSON Lines data from `stdin` to `stdout` (useful for grep):
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`cat {{file.json}} | jello -s`
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- Output all elements from arrays (or all the values from objects) in JSON or JSON-Lines data from `stdin` to `stdout`:
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`cat {{file.json}} | jello -l`
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- Output the first element in JSON or JSON-Lines data from `stdin` to `stdout`:
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`cat {{file.json}} | jello _[0]`
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- Output the value of a given key of each element in JSON or JSON-Lines data from `stdin` to `stdout`:
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`cat {{file.json}} | jello '[i.{{key_name}} for i in _]'`
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- Output the value of multiple keys as a new JSON object (assuming the input JSON has the keys `key_name1` and `key_name2`):
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`cat {{file.json}} | jello '{{{"key1": _.key_name1, "key2": _.key_name2, ...}}}'`
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- Output the value of a given key to a string (and disable JSON output):
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`cat {{file.json}} | jello -r '"{{some text}}: " + _.{{key_name}}'`
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