:title
list_find

:sig
String list_find(StringList items, function<bool (String)> f, String fallback = "")

:see
StringList
0_DValue
filter

:content
Returns the first matching item or fallback.

These helpers keep common data-shaping code close to render code, routers, and configuration trees. They are useful for route lists, navigation items, cards, and records that need simple transformations before rendering.

```cpp
String route = list_find(routes, [](String s) { return(str_starts_with(s, "dashboard")); }, "index");
```

Prefer these helpers over open-coded loops when the transformation itself is the important part of the code. Use an explicit loop when mutation, error handling, or side effects are the main concern.

## Related Concepts

- JavaScript / React: `Array.map`, `Array.filter`, `Array.find`, object `pick`/`omit`, and grouping route or navigation records before rendering.
- PHP: `array_map`, `array_filter`, `array_unique`, and associative array projection.