Skip to content
Search Create account

DEV Community

DEV Community is a community of 850,025 amazing developers

We're a place where coders share, stay up-to-date and grow their careers.

Create account Log in
Twitter Facebook Github Instagram Twitch
mr.Felistus
mr.Felistus

Posted on

Comparing elements in an Array and eliminating duplicates

#javascript #array #map

I want to compare the elements in an array, eliminate the duplicates using map().. example: array = [1,2,1,3,2]=> finalArray = [1,2,3]

Discussion (4)

Collapse
t0maslb profile image
t0maslb • • Edited on

This is how I'd do it in Python:

def delete_dupl(list):
    deleted = {}
    # add each element to a map
    for item in list:
        deleted[item] = 1
    # clear list to replace with the shortened one
    list.clear()
    for key in deleted:
        list.append(key)
    return deleted
print(delete_dupl(<given_list>))

There's probably a better way but adding each item to a map (dict) is enough, as there can't be repeated keys; then pass every key to an array.

Collapse
ezeugoobieze profile image
mr.Felistus Author •

Ok..
I don't speak python for now. Am a newbie in JavaScript trying to work on that task.

Thanks for your response...👍

Collapse
t0maslb profile image
t0maslb •

Well, I'm not fluent on JS either but I don't think they're so different at tackling this problem :)

Collapse
kdheeraj280702 profile image
Kdheeraj280702 •

Use sets that would make it easy

Read next

nicolasbiondini profile image

👨‍💻 FullStack simple tutorial to fetch data and display it

NicolasBiondini -

pavelkeyzik profile image

What do you use while working with Storybook?

Pavel Keyzik -

rembertdesigns profile image

Light/Dark Theme Calculator

Richard Rembert -

dillionmegida profile image

Array.pop() - for popping the last item of an array

Dillion Megida -