Converting the following ngRx selector to a boolean return – a guide

I am currently using the following filter to retrieve a list of data within a specific date range. I have implemented logic in the component where I check the length of the list and assign True or False to a variable based on that. I am wondering if there is a way to directly return a boolean and if this method is correct?

export const selectModel = (planedDate: Date) => createSelector(
 selectDrugReviews,
 (reviews: ReviewModel[]) => reviews.filter(date => date.startDateTime.getTime() <= planedDate.getTime() && (date.endDateTime !== undefined ? date.endDateTime.getTime() >= planedDate.getTime() : true))
);
angulartypescriptngrxngrx-store

Answer №1

Give this a shot

export const chooseModel = (selectedDate: Date) => createSelector(
 selectMedicationFeedback,
 (feedback: FeedbackModel[]) => feedback.map((dateTime) => dateTime.initialDateTime.getTime() <= selectedDate.getTime() && (dateTime.finalDateTime !== undefined ? dateTime.finalDateTime.getTime() >= selectedDate.getTime() : true))
);

Answer №2

To achieve the desired outcome, make sure to utilize the map function instead of filter.

map((item) => <your condition here>));

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