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  1. importPackage(java.io);
  2. importPackage(java.lang);
  3.  
  4. // your code goes here
  5.  
  6.  
  7. const showDuplicateSymbols= (e)=>{
  8.  
  9.  const value = e.target.value.trim()
  10.  
  11.    const uniqueChars = Array.from(new Set(value));
  12.  
  13.    const twiceChars = uniqueChars.filter(
  14.     (char) => value.split(char).length - 1 === 2
  15.   );
  16.  
  17.   return  twiceChars.length > 0 ? value : " ";
  18.  
  19. }
Success #stdin #stdout 0.35s 42196KB
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https://ideone.com/IqYgk5
language:
JavaScript (rhino 1.7.9)
created:
13 days ago
visibility:
public

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