mirror of
https://github.com/nushell/nushell.git
synced 2024-10-17 15:52:50 +02:00
105 lines
6.9 KiB
Markdown
105 lines
6.9 KiB
Markdown
# 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.
|
|
|
|
Where has two general forms:
|
|
|
|
- `where <column_name> <comparison> <value>`
|
|
- `where <column_name>`
|
|
|
|
## Where with comparison
|
|
|
|
In the first form, `where` is passed a column name that the filter will run against. Next, is the operator used to compare this column to its value. The following operators are supported:
|
|
|
|
- `<` (less than)
|
|
- `<=` (less than or equal)
|
|
- `>` (greater than)
|
|
- `>=` (greater than or equal)
|
|
- `!=` (not equal)
|
|
- `==` (equal)
|
|
|
|
Strings have two additional operators:
|
|
|
|
- `=~` (fuzzy match to allow)
|
|
- `!~` (fuzzy match to not allow)
|
|
|
|
Dates can also be compared using the duration types. For example, `where accessed > 2w` will check the date in accessed to see if it's greater than 2 weeks ago. Durations currently allow these abbreviations:
|
|
|
|
- `1s` (one second)
|
|
- `1m` (one minute)
|
|
- `1h` (one hour)
|
|
- `1d` (one day)
|
|
- `1w` (one week)
|
|
- `1M` (one month)
|
|
- `1y` (one year)
|
|
|
|
## Boolean check
|
|
|
|
Where with the form `| where readonly` is used to check boolean values. For example, the command `ls --full | where readonly` will list only those files that are readonly.
|
|
|
|
## Usage
|
|
|
|
```shell
|
|
> [input-command] | where [condition]
|
|
```
|
|
|
|
## Examples
|
|
|
|
```shell
|
|
> ls | where size > 4kb
|
|
───┬────────────┬──────┬──────────┬─────────────
|
|
# │ name │ type │ size │ modified
|
|
───┼────────────┼──────┼──────────┼─────────────
|
|
0 │ Cargo.lock │ File │ 113.3 KB │ 53 mins ago
|
|
1 │ Cargo.toml │ File │ 4.6 KB │ 53 mins ago
|
|
2 │ README.md │ File │ 15.8 KB │ 2 mins ago
|
|
───┴────────────┴──────┴──────────┴─────────────
|
|
```
|
|
|
|
```shell
|
|
> ps | where cpu > 0
|
|
───┬───────┬──────────────────┬─────────┬────────┬──────────┬─────────
|
|
# │ pid │ name │ status │ cpu │ mem │ virtual
|
|
───┼───────┼──────────────────┼─────────┼────────┼──────────┼─────────
|
|
0 │ 17917 │ nu_plugin_core_p │ Running │ 4.1678 │ 2.1 MB │ 4.8 GB
|
|
1 │ 14717 │ Discord Helper ( │ Running │ 1.6842 │ 371.9 MB │ 8.0 GB
|
|
2 │ 14713 │ Discord Helper │ Running │ 0.2099 │ 27.8 MB │ 5.8 GB
|
|
3 │ 14710 │ Discord │ Running │ 0.0883 │ 105.4 MB │ 7.0 GB
|
|
4 │ 9643 │ Terminal │ Running │ 4.0313 │ 266.4 MB │ 7.6 GB
|
|
5 │ 7864 │ Microsoft.Python │ Running │ 0.9828 │ 340.9 MB │ 8.0 GB
|
|
6 │ 24402 │ Code Helper (Ren │ Running │ 1.0644 │ 337.3 MB │ 8.4 GB
|
|
7 │ 24401 │ Code Helper (Ren │ Running │ 1.0031 │ 593.5 MB │ 8.6 GB
|
|
8 │ 519 │ EmojiFunctionRow │ Running │ 0.2063 │ 52.7 MB │ 7.5 GB
|
|
9 │ 376 │ CommCenter │ Running │ 0.1620 │ 30.0 MB │ 6.5 GB
|
|
───┴───────┴──────────────────┴─────────┴────────┴──────────┴─────────
|
|
|
|
```
|
|
|
|
```shell
|
|
> ls -f | where accessed <= 1w
|
|
───┬────────────────────┬──────┬────────┬──────────┬───────────┬─────────────┬───────┬──────────┬──────────────┬─────────────┬─────────────
|
|
# │ name │ type │ target │ readonly │ mode │ uid │ group │ size │ created │ accessed │ modified
|
|
───┼────────────────────┼──────┼────────┼──────────┼───────────┼─────────────┼───────┼──────────┼──────────────┼─────────────┼─────────────
|
|
0 │ CODE_OF_CONDUCT.md │ File │ │ No │ rw-r--r-- │ josephlyons │ staff │ 3.4 KB │ 52 mins ago │ 52 secs ago │ 52 mins ago
|
|
1 │ CONTRIBUTING.md │ File │ │ No │ rw-r--r-- │ josephlyons │ staff │ 1.3 KB │ 52 mins ago │ 4 mins ago │ 4 mins ago
|
|
2 │ Cargo.lock │ File │ │ No │ rw-r--r-- │ josephlyons │ staff │ 113.3 KB │ 52 mins ago │ 52 mins ago │ 52 mins ago
|
|
3 │ Cargo.toml │ File │ │ No │ rw-r--r-- │ josephlyons │ staff │ 4.6 KB │ 52 mins ago │ 52 mins ago │ 52 mins ago
|
|
4 │ README.md │ File │ │ No │ rw-r--r-- │ josephlyons │ staff │ 15.8 KB │ 52 mins ago │ 1 min ago │ 1 min ago
|
|
5 │ TODO.md │ File │ │ No │ rw-r--r-- │ josephlyons │ staff │ 0 B │ 52 mins ago │ 52 mins ago │ 52 mins ago
|
|
6 │ crates │ Dir │ │ No │ rwxr-xr-x │ josephlyons │ staff │ 704 B │ 4 months ago │ 52 mins ago │ 52 mins ago
|
|
7 │ docs │ Dir │ │ No │ rwxr-xr-x │ josephlyons │ staff │ 192 B │ 5 months ago │ 52 mins ago │ 52 mins ago
|
|
8 │ src │ Dir │ │ No │ rwxr-xr-x │ josephlyons │ staff │ 128 B │ 5 months ago │ 1 day ago │ 1 day ago
|
|
9 │ target │ Dir │ │ No │ rwxr-xr-x │ josephlyons │ staff │ 160 B │ 5 days ago │ 5 days ago │ 5 days ago
|
|
───┴────────────────────┴──────┴────────┴──────────┴───────────┴─────────────┴───────┴──────────┴──────────────┴─────────────┴─────────────
|
|
```
|
|
|
|
```shell
|
|
> ls -a | where name =~ "yml"
|
|
──────────┬─────────────
|
|
name │ .gitpod.yml
|
|
type │ File
|
|
size │ 866 B
|
|
modified │ 1 month ago
|
|
──────────┴─────────────
|
|
```
|