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jello: add page (#6113)
* jello: add page add page for jello command (I am the author) https://github.com/kellyjonbrazil/jello * add bash language identifier * add string example * remove mult-line command example that was causing CI failure * Uppercase Python Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com> * move quotation marks Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com> * add bracket at beginning of dictionary * make 'some text` a variable Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com> * update stdin/stdout wording Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com> * Clarify stdin and stdout. Also, change JSON LInes to JSON-Lines * Clarify 'grepable' Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com> Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com>
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pages/common/jello.md
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pages/common/jello.md
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# jello
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> A command-line JSON processor using Python syntax.
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> More information: <https://github.com/kellyjonbrazil/jello>.
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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_name` and `other_key_name`):
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`cat {{file.json}} | jello '{"{{my_new_key}}": _.{{key_name}}, "{{my_other_key}}": _.{{other_key_name}}}'`
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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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