Remove duplicate characters from string

Question

I have to make a function in JavaScript that removes all duplicated letters in a string. So far I\'ve been able to do this: If I have the word \"anaconda\" it shows me as a

Answer 1

  //One simple way to remove redundecy of Char in String
       var char = "aaavsvvssff"; //Input string
       var rst=char.charAt(0);
       for(var i=1;i=0 ?0:(rst +=  char.charAt(i) ); 
       }
       console.log(JSON.stringify(rst)); //output string : avsf