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Merge pull request #899 from loksonarius/document-tags-command
Add documentation for tags command
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# tags | ||
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The tags commands allows users to access the metadata of the previous value in | ||
the pipeline. This command may be run on multiple values of input as well. | ||
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As of writing this, the only metadata returned includes: | ||
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- `span`: the start and end indices of the previous value's substring location | ||
- `anchor`: the source where data was loaded from; this may not appear if the | ||
previous pipeline value didn't actually have a source (like trying to `open` a | ||
dir, or running `ls` on a dir) | ||
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## Examples | ||
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```shell | ||
> open README.md | tags | ||
━━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ | ||
span │ anchor | ||
────────────────┼────────────────────────────────────────────────── | ||
[table: 1 row] │ /Users/danielh/Projects/github/nushell/README.md | ||
━━━━━━━━━━━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ | ||
``` | ||
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```shell | ||
> open README.md | tags | get span | ||
━━━━━━━┯━━━━━ | ||
start │ end | ||
───────┼───── | ||
5 │ 14 | ||
━━━━━━━┷━━━━━ | ||
``` | ||
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```shell | ||
> ls | tags | first 3 | get span | ||
━━━┯━━━━━━━┯━━━━━ | ||
# │ start │ end | ||
───┼───────┼───── | ||
0 │ 0 │ 2 | ||
1 │ 0 │ 2 | ||
2 │ 0 │ 2 | ||
━━━┷━━━━━━━┷━━━━━ | ||
``` | ||
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## Reference | ||
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More useful information on the `tags` command can be found by referencing [The | ||
Nu Book's entry on Metadata](https://book.nushell.sh/en/metadata) |