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  1. Array.prototype.duplicates = function() {
  2. 	return this.filter((x, y, z) => {
  3. 		return y !== z.lastIndexOf(x);
  4. 	});
  5. }
  6.  
  7. // retornará somente os valores duplicados do array
  8. console.log(["js", "php", "html", "js", "css", "php"].duplicates()); // [js, php]
Success #stdin #stdout 0.03s 17132KB
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js,php
https://ideone.com/sorfs9
retornar somente os valores duplicados de um array
language:
JavaScript (SMonkey 60.2.3)
created:
2 years ago
visibility:
public

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