isArrayItem()function
isArrayItem(list: PossibleArray<T>, item: unknown): item is T
| Param | Type | |
|---|---|---|
list | PossibleArray<T> | The array or iterable to search. required |
item | unknown | The value to look for. required |
| Return | |
|---|---|
item is T | true if item exists in list, narrowing its type. |
Is an unknown value an item in a specified array or iterable?
Examples
isArrayItem([1, 2, 3], 2); // true
isArrayItem([1, 2, 3], 9); // false