Javascript Array Map Without Duplicates. Creating a set itself eliminates duplicate entries from the array. If you use filter indexOf method then performance might get slow in the large amount of data.
Rooted in mathematics map is the concept of transforming a set into another type of set while preserving structure. You have an array of objects where some of them are duplicates but with different object properties and you want to get only one object with all of those properties. On each iteration well use ArrayindexOf to see if our item already exists.
It does not make process slow.
For other browsers while loop is the fastest method since those. Is used to include all the elements of the Set to a new array. In simpler terms much of our job is done by the collection. There has been a huuuge BENCHMARKS thread providing following information.
