重命名Javascript数组中的重复项

Question

我正在寻找一种最有效的方法来重命名(append-1,-2等)一个变量,如果它已经存在于一个字符串中.

所以我保持一个阵列"

dupeCheck = [];

只要我看到一个变量:

var UID;

已经在我的dupeCheck数组中,我想立即用-1附加UID的值,

另外,我需要防止第三个重复成为字符串-1-1,而是字符串-2 ..

我看到了这一点:将计数附加到javascript字符串数组中的重复 之前,但它正是我想要的......

任何聪明的想法？我更喜欢jQuery ..

/编辑:

例如:

var dupeUIDCheck = [];  

$.each(data[IDS].UIDs[keys], function(keys, val)
     {
     var currString = val;
     switch (key)
 {
      case "UID":

       UID = unquote(currString);

   //TODO:
   //Detect if multiple UIDs are loaded from a single source, and
   //rename them:

   dupeUIDCheck.push(UID); //Push current ID onto existing array

       //Check if ID exists
       ?
       //If exists rename value of currString, save it in currString
       newName = currSting;
      break;

      case "otherstuff":
           //Other vars to parse
      break;
     }

因此,当我们摆脱"UID"的情况时,我想确保它具有唯一的价值

Answer 1

您可以将功能包装在函数中以便能够重用它.下面的函数将字符串列表,并返回-1,-2等后缀的字符串列表.

function suffixDuplicates( list )
{
    // Containers

    var count = { };
    var firstOccurences = { };

    // Loop through the list

    var item, itemCount;
    for( var i = 0, c = list.length; i < c; i ++ )
    {
        item = list[ i ];
        itemCount = count[ item ];
        itemCount = count[ item ] = ( itemCount == null ? 1 : itemCount + 1 );

        if( itemCount == 2 )
            list[ firstOccurences[ item ] ] = list[ firstOccurences[ item ] ] + "-1";
        if( count[ item ] > 1 )
            list[ i ] = list[ i ] + "-" + count[ item ]
        else
            firstOccurences[ item ] = i;       
    }

    // Return
    return list;
}

例如,输入

[ "Barry", "Henk", "Jaap", "Peter", "Jaap", "Jaap", "Peter", "Henk", "Adam" ]

返回的输出

[ "Barry", "Henk-1", "Jaap-1", "Peter-1", "Jaap-2", "Jaap-3", "Peter-2", "Henk-2", "Adam" ]

要查看它的实际效果,这里有一个指向jsFiddle示例的链接.