Filter out Duplicates from Flat JavaScript Array with array.filter

JavaScript

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In this lesson you will learn how to remove duplicates from the flat array which is a common coding challenge for beginner JavaScript interviews.

We will learn how to write a duplicate removal function using functional programming approach with filter. The array filter method allows you to create a new array out of elements that pass a certain condition within the filter. You'll see how we can use indexOf to filter out any duplicates.

Duraimurugan Rajendran

~ 4 years ago

Hey Dimitri I always wonder how people are adding the emoji's in the their code in the demo. Could you please let us know if its copy pasted?

Lucas Minter

~ 4 years ago

There are a couple ways you could do it, you can paste them in or if you are using vscode, you can add extensions that will let you add them in pretty easily.