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JavaScript實現查找字符串中第一個不重復的字符

   此算法僅供參考,小菜基本不懂高深的算法,只能用最樸實的思想去表達。

  代碼如下:

  //找出字符串中第一個不重復的字符

  // firstUniqueChar("vdctdvc"); --> t

  function firstUniqueChar(str){

  var str = str || "",

  i = 0,

  k = "",

  _char = "",

  charMap = {},

  result = {name: "",index: str.length};

  for(i=0;i

  _char = str.charAt(i);

  if(charMap[_char] != undefined){

  charMap[_char] = -1;

  }else{

  charMap[_char] = i;

  }

  }

  for(k in charMap){

  if(charMap[k]<0){

  continue;

  }

  if(result.index>charMap[k]){

  result.index = charMap[k];

  result.name = k;

  }

  }

  return result.name;

  }

  小伙伴們如有更好的思路,還請告之一下,不勝感激

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