Removing duplicate arrays of an array : javascript

Question

I am working with javascript arrays, where i have an array of arrays like,

var arr = [ [ 73.0191641, 33.5720131 ], [ 73.0191641, 33.5720131 ], [ 3.0191641, 33.5720131 ], [ 73.0191641, 33.5720131 ], [ 73.0191641, 33.5720131 ], [ 73.0192222, 33.5778921 ], [ 73.0192222, 33.5778921 ]];

There, i needed to remove the duplicate arrays. I have tried this method but it didn't worked for me, may be i am missing or doing something wrong.

var distinctArr = Array.from(new Set(arr));

Although this method works only for array of objects. If someone can help, please do help. Thanks for your time.

Specify your problem because I guess you want to remove whole rows of this array of arrays, not separate elements. If so - it's not a dupe. — kind user
– kind user, Commented May 10, 2017 at 9:54

dasiekjs · Accepted Answer · 2017-05-10 09:45:44Z

Lodash is great lib for doing this little things.

uniqWith with compare isEqual should resolve your problem.

var arr = [ [ 73.0191641, 33.5720131 ], [ 73.0191641, 33.5720131 ], [ 3.0191641, 33.5720131 ], [ 73.0191641, 33.5720131 ], [ 73.0191641, 33.5720131 ], [ 73.0192222, 33.5778921 ], [ 73.0192222, 33.5778921 ]]; _.uniqWith(arr,_.isEqual) return -> [Array(2), Array(2), Array(2)]

kind user · Accepted Answer · 2017-05-10 15:26:01Z

1

You can use following approach.

var arr = [ { person: { amount: [1,1] } }, { person: { amount: [1,1] } }, { person: { amount: [2,1] } }, { person: { amount: [1,2] } }, { person: { amount: [1,2] } }]; hash = [...new Set(arr.map(v => JSON.stringify(v)))].map(v => JSON.parse(v)); document.write(`<pre>${JSON.stringify(hash, null, 2)}</pre>`);

edited May 10, 2017 at 15:26

answered May 10, 2017 at 9:46

kind user

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3 Comments

Suhail Mumtaz Awan Over a year ago

Thanks for the help, it really worked. any idea what should be done for the array of kind var array = [ { person: { amount: [1,1] } }, { person: { amount: [1,1] } }, { person: { amount: [2,1] } }, { person: { amount: [1,2] } }, { person: { amount: [1,2] } }]; ??

kind user Over a year ago

@SuhailMumtazAwan Do you still have problem with this?

Suhail Mumtaz Awan Over a year ago

No, not at all.

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