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Merge pull request #776 from gilesv/where-command

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Create where.md
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Jonathan Turner 2019-10-03 15:38:59 +13:00 committed by GitHub
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# where
This command filters the content of a table based on a condition passed as a parameter, which must be a boolean expression making use of any of the table columns. Other commands such as `ls` are capable of feeding `where` with their output through pipelines.
## Usage
```shell
> [input-command] | where [condition]
```
## Examples
```shell
> ls | where size > 4kb
----+----------------+------+----------+----------+----------------+----------------
# | name | type | readonly | size | accessed | modified
----+----------------+------+----------+----------+----------------+----------------
0 | IMG_1291.jpg | File | | 115.5 KB | a month ago | 4 months ago
1 | README.md | File | | 11.1 KB | 2 days ago | 2 days ago
2 | IMG_1291.png | File | | 589.0 KB | a month ago | a month ago
3 | IMG_1381.jpg | File | | 81.0 KB | a month ago | 4 months ago
4 | butterfly.jpeg | File | | 4.2 KB | a month ago | a month ago
5 | Cargo.lock | File | | 199.6 KB | 22 minutes ago | 22 minutes ago
```
```shell
> ps | where cpu > 10
---+-------+----------+-------+-----------------------------
# | pid | status | cpu | name
---+-------+----------+-------+-----------------------------
0 | 1992 | Sleeping | 44.52 | /usr/bin/gnome-shell
1 | 1069 | Sleeping | 16.15 |
2 | 24116 | Sleeping | 13.70 | /opt/google/chrome/chrome
3 | 21976 | Sleeping | 12.67 | /usr/share/discord/Discord
```