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Mamun Abdullah
Mamun Abdullah

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How to convert a Set to an Array? – JavaScript

#javascript #tradecoder

When you remove the duplicate numbers from an array with new Set() method, it turns into a set instead of an array like this

let duplicates = [1,2,3,4,5,6,2]; // remove the duplicates let noDuplicates = new Set(duplicates); // output Set {1,2,3,4,5,6}
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Duplicates may happen by posting/collecting same value from one/different sources, or by concat() arrays.

And you can convert that set to an array again.

Solution 1: 

let duplicates = [1,2,3,4,5,6,2]; // remove the duplicates let noDuplicates = new Set(duplicates); // output {1,2,3,4,5,6} let arrayWithNoDuplicates = Array.from(noDuplicates); // output [1,2,3,4,5,6]
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Solution 2: 

 let duplicates = [1,2,3,4,5,6,2]; // remove the duplicates let noDuplicates = new Set(duplicates); // output {1,2,3,4,5,6} let arrayWithNoDuplicates = [...noDupicates]; // output [1,2,3,4,5,6]
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Solution 3: 

let duplicates = [1,2,3,4,5,6,2]; let noDuplicates = Array.from(new Set(duplicates)) // output [1,2,3,4,5,6]
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Solution 4: 

let duplicates = [1,2,3,4,5,6,2]; let noDuplicates = [... new Set(duplicates)]; // output [1,2,3,4,5,6]
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Apply 

let a = [1,2,3,4]; let b = [5,6,2]; let c = a.concat(b); let d = new Set(c); let e = Array.from(d); // or in one line let f = Array.from(new Set(a.concat(b)));
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Source : How to convert a Set to an Array? – JavaScript | tradecoder

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