Function: filterNullAndUndefinedAndEmpty()
filterNullAndUndefinedAndEmpty<
TValue>(value:""|Nullish|TValue):value is TValue
Checks whether a value is not null nor undefined nor '' (empty string).
This can be used in Array.filter to remove null, undefined from the array type
Type Parameters
| Type Parameter |
|---|
TValue |
Parameters
| Parameter | Type | Description |
|---|---|---|
value | "" | Nullish | TValue | The value to verify that is neither null, undefined nor '' (empty string) |
Returns
value is TValue
A boolean that is true if the value is neither null, undefined nor '' (empty string), false otherwise.
Example
// TypeScript Type: (string | undefined | null)[]
const someArray = ['one', 'two', undefined, null, ''];
// TypeScript Type: string[]
const filteredArray = someArray.filter(filterNullAndUndefinedAndEmpty);
// Result: ['one', 'two']