Function takeWhile

takeWhile<T, R>(condition: (v: T, idx: number) => v is R): Transformer<T, R>
Take items from a stream until a given condition is false, then close the output. The condition function is not called again after it returns false.

If the condition 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
- condition: (v: T, idx: number) => v is R
Returns Transformer<T, R>
- Defined in src/operators.ts:335
takeWhile<T>(condition: (v: T, idx: number) => boolean): Transformer<T>
Take items from a stream until a given condition is false, then close the output. The condition function is not called again after it returns false.

If the condition 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
- condition: (v: T, idx: number) => boolean
Returns Transformer<T>
- Defined in src/operators.ts:336