Find the repeated item in an array using TypeScript

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Say you have an array that has at least one item repeated. How would you find the repeated item. This is a question commonly presented to beginner developers. Here we discuss the elegant solution to this problem.

Lev Kowalski
Lev Kowalski
~ 3 years ago

Thanks for this course. How is it possible for Set.prototype.has to have a constant runtime ?