# Description
This PR enables `select` to take a constructed list of columns as a
variable.
```nushell
> let cols = [name type];[[name type size]; [Cargo.toml toml 1kb] [Cargo.lock toml 2kb]] | select $cols
╭#┬───name───┬type╮
│0│Cargo.toml│toml│
│1│Cargo.lock│toml│
╰─┴──────────┴────╯
```
and rows
```nushell
> let rows = [0 2];[[name type size]; [Cargo.toml toml 1kb] [Cargo.lock toml 2kb] [file.json json 3kb]] | select $rows
╭#┬───name───┬type┬size╮
│0│Cargo.toml│toml│1kb │
│1│file.json │json│3kb │
╰─┴──────────┴────┴────╯
```
# User-Facing Changes
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# Tests + Formatting
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