Can someone give a quick overview of the benefits of flatMap? Im still struggling to get my head round a useful use-case.
flatMap
Let's say you have a bunch of objects, let's say they are People{}, and they have an array of children[].
If you wanted the list of children, of an array of people, you could use flat map.
people.flatMap(p => p.children)
So you return the array of children, and all those arrays get flattened into 1 giant array.
Ahh I see, so it’s like .map().flat()?
.map().flat()
Makes sense, still only seeing limited use cases. But saves looping twice I guess.
Might be dependant upon your projects you do. We deal with a lot of nested dynamic data at work, we use this technique a lot.
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Can someone give a quick overview of the benefits of
flatMap? Im still struggling to get my head round a useful use-case.Let's say you have a bunch of objects, let's say they are People{}, and they have an array of children[].
If you wanted the list of children, of an array of people, you could use flat map.
people.flatMap(p => p.children)
So you return the array of children, and all those arrays get flattened into 1 giant array.
Ahh I see, so it’s like
.map().flat()?Makes sense, still only seeing limited use cases. But saves looping twice I guess.
Might be dependant upon your projects you do. We deal with a lot of nested dynamic data at work, we use this technique a lot.