Function isNotNull

isNotNull<T>(this: void, x: T | null): x is T
Verifies that the given value is not null. This especially helps with a .filter
Type Parameters
- T
Parameters
- this: void
- x: T | null
Returns x is T
Example
```
const values: (number | null)[] = [1, 2, null, 4];
const nonNullValues: number[] = values.filter(isNotNull);
// nonNullValues is now of type number[]
```
See
- isUndefined
- isNotUndefined
- Defined in src/util/assert.ts:68