Function grab

grab<T, K>(cons, key, defaultVal?): IObservable<undefined | T[K]>
compute an observable and return a new Observable that is equal to some property of the original Observable
Type Parameters
- T
- K extends string | number | symbol
Parameters
- cons: IObservable<T>
- key: K
- Optional defaultVal: T[K]
Returns IObservable<undefined | T[K]>
- Defined in observables.ts:222

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