isNotNil
Import from @varavel/vdl-plugin-sdk/utils/predicates.
function isNotNil<T>(x): x is T;
Checks if the given value is not null nor undefined.
The main use of this function is to be used with TypeScript as a type predicate.
Type Parameters
| Type Parameter | Description |
|---|---|
T | The type of value. |
Parameters
| Parameter | Type | Description |
|---|---|---|
x | T | null | undefined | The value to test if it is not null nor undefined. |
Returns
x is T
True if the value is not null nor undefined, false otherwise.
Example
// Here the type of `arr` is (number | undefined)[]
const arr = [1, undefined, 3];
// Here the type of `result` is number[]
const result = arr.filter(isNotNil);
// result will be [1, 3]