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Say I have an array like this: [1, 1, 2, 2, 3]
I want to get the duplicates which are in this case: [1, 2]
Does lodash support this? I want to do it in the shortest way possible.
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Lodash's 'uniq' family of methods can be implemented in plain JS without trouble. Lodash is a very useful utility library that lets us work with objects and arrays easily.
We can remove duplicate elements from an array using the _. uniq() method of Lodash. This method keeps the first instance of an element and removes the remaining one. Therefore, the order of an element in the resultant array depends on its occurrence in the array.
isEqual() Method. The Lodash _. isEqual() Method performs a deep comparison between two values to determine if they are equivalent. This method supports comparing arrays, array buffers, boolean, date objects, maps, numbers, objects, regex, sets, strings, symbols, and typed arrays.
You can use this:
_.filter(arr, (val, i, iteratee) => _.includes(iteratee, val, i + 1)); Note that if a number appears more than two times in your array you can always use _.uniq.
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