Get all unique values in a JavaScript array (remove duplicates)

Question

I was trying to run a snippet code which will help me to get all the unique numbers present in an array. But the code is not running properly, if an array consists of 0. Can anyone help me with the code:

Array.prototype.getUnique = function() {

 var o = {}, a = [], i, e;

 for (i = 0; e = this[i]; i++) {o[e] = 1};

 for (e in o) {a.push (e)};

 return a;

}

Answer 1

Basically, if you are using JavaScript then, you can use the filter method to get all the unique values in an array:

function Unique(value, index, self) {

  return self.indexOf(value) === index;

}

// usage example:

var a = ['a', 1, 'a', 2, '1'];

var unique = a.filter(Unique);

console.log(unique); // ['a', 1, 2, '1']

I hope this will help.

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