Function findIndex

findIndex<T>(array, compare): number
Returns the index of the first element in the array where predicate is true, and -1 otherwise.
Type Parameters
- T
Parameters
- array: readonly T[]
- compare: ((value) => boolean)
  - - (value): boolean
    - Parameters
      value: T
      Returns boolean
Returns number
Example
```
const obj = [{name: 'abc'}]
const index = findIndex(obj, v => v.name = 'abc')
// 0
```
- Defined in src/array.ts:609