# LibTmux::Selection#filter

- **Module:** LibTmux
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/d8ce4bbee0ca7748a81929f81f7d8d07f8c51267/gems/libtmux/lib/libtmux/selection.rb#L26
- **Page:** https://libtmux.org/en/ruby/v0.1.0.alpha.3/reference/libtmux-selection-filter/

```
def filter: () {
  (Elem) -> untyped
} -> ::LibTmux::Selection[Elem]

def filter: () -> ::Enumerator[
  Elem,
  ::LibTmux::Selection[Elem]
]
```

Behavior: Selections.

Behavior contract: Selections.