Map vs Reduce

[Rastraponovich]

why are you using 2(3) map functions instead of 1 reduce?
in this

[ovflowd]

Because, yes. Each data structure is used for a different purpose. The first map is used to pass avatars to the AvatarGroups component whilst the 2nd is to simply get the name of the person. To be honest, the 2nd map could come from authors instead of avatars but the end effect is the same. Only one reduce wouldn't suffice.

The 2nd map is being used to convert the object structure into a scalar so we can "join" the values of the object. To be honest, we could use a toString function within the original object.

In performance terms, this is negligible since these arrays would never pass the dozens of entries. Even with millions of entries this mapping is simple enough.