this post was submitted on 13 Feb 2025
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Nushell

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What is Nushell?

Nushell is a powerful shell and scripting language with strong typing, querying, and piping functionalities.

From the official documentation; Introduction:

The goal of this project is to take the Unix philosophy of shells, where pipes connect simple commands together, and bring it to the modern style of development. Thus, rather than being either a shell, or a programming language, Nushell connects both by bringing a rich programming language and a full-featured shell together into one package.

Nu takes cues from a lot of familiar territory: traditional shells like bash, object based shells like PowerShell, gradually typed languages like TypeScript, functional programming, systems programming, and more. But rather than trying to be a jack of all trades, Nu focuses its energy on doing a few things well:

Examples

Shell Examples…

0x[7F000001] | chunks 1 | each { into int } | str join "."
# => 127.0.0.1
ls | where size > 1kb
# => ╭───┬───────────────────┬──────┬─────────┬────────────╮
# => │ # │       name        │ type │  size   │  modified  │
# => ├───┼───────────────────┼──────┼─────────┼────────────┤
# => │ 0 │ Gemfile           │ file │ 1.1 KiB │ 3 days ago │
# => │ 1 │ Gemfile.lock      │ file │ 6.9 KiB │ 3 days ago │
# => │ 2 │ LICENSE           │ file │ 1.1 KiB │ 3 days ago │
# => │ 3 │ SUMMARY.md        │ file │ 3.7 KiB │ 3 days ago │
# => ╰───┴───────────────────┴──────┴─────────┴────────────╯
help commands | where name == each | first | get params.name
# => ╭───┬──────────────────╮
# => │ 0 │ closure          │
# => │ 1 │ --help(-h)       │
# => │ 2 │ --keep-empty(-k) │
# => ╰───┴──────────────────╯
http get https://programming.dev/api/v3/site | get all_languages | length
# => 184

http get https://programming.dev/api/v3/site | get taglines.content
# => ╭───┬────────────────────────────────────╮
# => │ 0 │ Broken communities have been fixed │
# => ╰───┴────────────────────────────────────╯

Web-Links

founded 3 months ago
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I added two solutions to the Rosetta Code FizBuzz page in Nu.

The one that was already there was quite confusing/non-intuitive to me; with string determination, and by index value fixups.

I like the match solution because it's structurally obvious and demonstrates the record-field-value match and logical case matching:

1..100 | each {
  { x: $in, mod3: ($in mod 3), mod5: ($in mod 5), }
  | match $in {
    { mod3: 0, mod5: 0, } => 'FizzBuz',
    { mod3: 0, mod5: _, } => 'Fizz',
    { mod3: _, mod5: 0, } => 'Buzz',
                        _ => $in.x
  }
} | str join "\n"

Do you have alternative suggestions or improvements?

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