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.

• Ivanka Todorova: Possible duplicate of Unique values in an array
• kind user: 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.

Answer 1

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)]

Answer 2

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>`);

• Suhail Mumtaz Awan: 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: @SuhailMumtazAwan Do you still have problem with this?
• Suhail Mumtaz Awan: No, not at all.