javascript Andela删除iamuchejude创建的Javascript中的重复测试 - https://repl.it/@iamuchejude/Andelas-remove-dup

Posted 2021-05-03

function removeDuplicates(str) {
  let strings = str.toLowerCase().split("");
  let unique = [];
  let checked = [];
  
  for(let i=0; i<strings.length; i++) {
    if(checked.indexOf(strings[i]) == -1) {
      if(strings.lastIndexOf(strings[i]) == strings.indexOf(strings[i])) {
        unique.push(strings[i]);
        checked.push(strings[i]);
      } else {
        checked.push(strings[i]);
      }
    }
  }

  return {uniques: checked.sort().join('').replace(/[^a-zA-Z ]/g, ""), duplicates: strings.join("").length - checked.length};
}