Get Unique Values from Array

Question

var arr = ["THYROID","CARDIAC","CARDIAC,DIABETES","METABOLIC,ARTHRITIS","RENAL DISEASES,DIABETES","LIVER DISEASES,HEPATITIS","LIVER DISEASES,CANCER,METABOLIC","LIVER DISEASES,HEPATITIS,ARTHRITIS,METABOLIC"]

Above is my Code, I need to fetch unique Values from this array using Javascript.

Like, what i expect is: If i ask for Unique Values , it should get me :

var arr = ["THYROID","CARDIAC","DIABETES","METABOLIC","RENAL DISEASES","LIVER DISEASES,"CANCER",ARTHRITIS","HEPATITIS"]

Paul · Accepted Answer · 2014-01-29 07:02:06Z

1

If you have an array of strings, you can just create an object using those strings as keys, then get the keys from that object.

Create the object

for (var t = {}, i = 0; i < arr.length; i++) 
  t[arr[i]] = 0;

Create an array from the objects keys

// Modern browsers only
arr = Object.keys(t);

// In older browsers you can use the polyfill from the link below,
// or just loop through the object like this:
arr = [];
for (var k in t)
  arr.push(k);

Object.keys

answered Jan 29, 2014 at 7:02

Paul

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