Function findIndex

findIndex<T>(arr: T[], element: T): number
Finds the index of a given element in an array.
Type Parameters
- T
Parameters
- arr: T[]
  The array in which to find the element.
- element: T
  The element to find.
Returns number
The index of the element in the array, or -1 if the element is not found.
Example
```
const arr = [1, 2, 3, 4, 5];
const element = 3;
const index = findIndex(arr, element);
console.log(index); // 2
```
- Defined in array.ts:53