CODEWITHSUNDEEP
javascriptlodash
james emanon
james emanon

Reputation: 11837

Why isn't this lodash uniq isSorted not working?

So, I would expect this to sort, but it isn't.

_.uniq(array, [isSorted], [iteratee], [thisArg])

so

_.uniq([10,3,13,1,0,2], true);

I run that, and it doesn't sort. I'd expect it to return: [0,1,2,3,10,13]

Upvotes: 0

Views: 260

Answers (1)

Sergiu Paraschiv
Sergiu Paraschiv

Reputation: 10163

That's not what the isSorted parameter does.

[isSorted] (boolean): Specify the array is sorted. - https://lodash.com/docs#uniq

does not mean it will also sort the array for you but that if you set it to true then it's expecting an already sorted array.

Providing true for isSorted performs a faster search algorithm for sorted arrays.

It's an optimization in that the algorithm for "Creates a duplicate-free version of an array" is a lot faster if the array is already sorted.

Upvotes: 2

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