Function filter

filter<T, R>(filter: (v: T, idx: number) => v is R): Transformer<T, R>
Create a subset of a stream, based on a filter function (like Array.filter)

The filter function receives the current index (zero-based) as well as the current value. If it returns truth, the value will be passed to the output, otherwise it will be skipped.

If the filter function is typed as a Typescript type guard (i.e. as returning v is SomeType), then the resulting source will be typed as Source.
Type Parameters
- T
- R
Parameters
- filter: (v: T, idx: number) => v is R
Returns Transformer<T, R>
- Defined in src/operators.ts:85
filter<T>(filter: (v: T, idx: number) => boolean): Transformer<T>
Create a subset of a stream, based on a filter function (like Array.filter)

The filter function receives the current index (zero-based) as well as the current value. If it returns truth, the value will be passed to the output, otherwise it will be skipped.

If the filter function is typed as a Typescript type guard (i.e. as returning v is SomeType), then the resulting source will be typed as Source.
Type Parameters
- T
Parameters
- filter: (v: T, idx: number) => boolean
Returns Transformer<T>
- Defined in src/operators.ts:86