Function isNullOrUndefined

isNullOrUndefined<T>(value): value is undefined | null
Checks if value is not null or undefined, acts as a typescript safeguard.
Type Parameters
- T
Parameters
- value: undefined | null | T
Returns value is undefined | null
Example
```
[null, undefined, 1, 5].filter(isUndefined)
> [null, undefined]

[null, undefined, 1, 5].filter(isNot(isUndefined))
> [1, 5]
```
- Defined in src/guards.ts:123