[T].indexOf

Method

[T].indexOf(value: T) -> u32? where T: Equatable

Finds the first index containing an equal element.

Returns None when the value is absent. The index is a u32, matching the array indexing and length APIs, and the element type must support equality.

Parameters

value: The element to find.

Effects: pure

Runtime behavior: available everywhere; synchronous

Examples

Find a checkpoint in a route table

let route = [2, 4, 7]
let bossIndex = route.indexOf(7)