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#1 by (4 votes)
#2 by (1 votes)

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I have the following code in JavaScript and I would like to know where the error lies, I need to print non-repeated values or if you know some more effective way:

 var t1  = 2;
 var t2 = 2;
 var t3 = 3;

 var t4 = [t1,t2,t3];
 var t5 = t4.unique();
 console.log(t5);

javascript

asked by Rafael Pereira 25.01.2018 в 19:44

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2 answers

1

From ECMAScript 6 you can use the data structure: Set

[...new Set([1, 2, 2])]

answered by 25.01.2018 в 21:41

Concatenate numerical values in an array using a hyphen How to use ArrayList in JavaScript

score 4 · Accepted Answer

The array in JavaScript does not have unique function.

If you are using ES5, you can do the following:

function unique(value, index, self) { 
   return self.indexOf(value) === index;
}

var t1 = 2;
var t2 = 2;
var t3 = 3;

var t4 = [t1,t2,t3];
var t5 = t4.filter(unique);
console.log(t5);

If you are using ES6, you can do the following:

var t1 = 2;
var t2 = 2;
var t3 = 3;

var t4 = [t1,t2,t3];
var t5 = t4.filter((value, index, self) => self.indexOf(value) === index);
console.log(t5);