CODEWITHSUNDEEP
javascript
Damon
Damon

Reputation: 127

Remove same values in a string

Is it possible to remove duplicated values in a string?

e.g: aaa, bbb, ccc, ddd, bbb, ccc, eee, fff, ggg

the expected output be like: aaa, bbb, ccc, ddd, eee, fff, ggg

I have no idea how should I achieve on this.

Upvotes: 0

Views: 65

Answers (3)

RomanPerekhrest
RomanPerekhrest

Reputation: 92854

EcmaScript5 solution using String.prototype.match() and Array.prototype.filter() functions:

var str = 'aaa, bbb, ccc, ddd, bbb, ccc, eee, fff, ggg',
    unique_items = str.match(/\b\w+\b/g).filter(function (el, idx, a) {
        return idx === a.lastIndexOf(el);
    });

// unique_items.sort();  // to get a sorted list of words(alphabetically)
console.log(unique_items);

// back to string
console.log(unique_items.join(', '));

It will also cover such sophisticated input strings as 'aaa, bbb,, ccc, ddd, bbb, ccc? eee,, fff, ggg,,'

Upvotes: 1

Muhammad Asif Javed
Muhammad Asif Javed

Reputation: 618

Using Reduce Function with out disturb the existing order

var names = ["No","Speaking","Guy","No","Test","Solutions","No"];

var uniq = names.reduce(function(a,b){
    if (a.indexOf(b) < 0 ) a.push(b);
    return a;
  },[]);

console.log(uniq, names) // [ 'No', 'Speaking', 'Guy', 'Test', 'Solutions' ]

// one liner
return names.reduce(function(a,b){if(a.indexOf(b)<0)a.push(b);return a;},[]);

Upvotes: 1

B&#225;lint
B&#225;lint

Reputation: 4039

Split the string at the commas and then put the result array in a Set. The set object is like an array, but it only stores 1 of each value.

var set = new Set(yourString.split(","));
var distinctValues = Array.from(set).join();

Upvotes: 0

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