並べ替え

構造体の配列をColdFusionで並べ替える方法



How Sort An Array Structs Coldfusion



解決：

これはオリジナルによく似たものですStructSort（）。また、pathToSubElement引数。

   
Usage / test:

 
 
 arr = ArrayNew(1); for (i = 1; i lte 5; i = i + 1) { s = StructNew(); s.a.b = 6 - i; ArrayAppend(arr, s); } 
   
  
Result:
 
 ArrayOfStructSort Result
 
 
  
As usual, CFLib.org has exactly what you want.
 
http://cflib.org/udf/ArrayOfStructsSort
 
/** * Sorts an array of structures based on a key in the structures. * * @param aofS Array of structures. * @param key Key to sort by. * @param sortOrder Order to sort by, asc or desc. * @param sortType Text, textnocase, or numeric. * @param delim Delimiter used for temporary data storage. Must not exist in data. Defaults to a period. * @return Returns a sorted array. * @author Nathan Dintenfass ( [email protected] ) * @version 1, December 10, 2001 */ function arrayOfStructsSort(aOfS,key){ //by default we'll use an ascending sort var sortOrder = 'asc'; //by default, we'll use a textnocase sort var sortType = 'textnocase'; //by default, use ascii character 30 as the delim var delim = '.'; //make an array to hold the sort stuff var sortArray = arraynew(1); //make an array to return var returnArray = arraynew(1); //grab the number of elements in the array (used in the loops) var count = arrayLen(aOfS); //make a variable to use in the loop var ii = 1; //if there is a 3rd argument, set the sortOrder if(arraylen(arguments) GT 2) sortOrder = arguments[3]; //if there is a 4th argument, set the sortType if(arraylen(arguments) GT 3) sortType = arguments[4]; //if there is a 5th argument, set the delim if(arraylen(arguments) GT 4) delim = arguments[5]; //loop over the array of structs, building the sortArray for(ii = 1; ii lte count; ii = ii + 1) sortArray[ii] = aOfS[ii][key] & delim & ii; //now sort the array arraySort(sortArray,sortType,sortOrder); //now build the return array for(ii = 1; ii lte count; ii = ii + 1) returnArray[ii] = aOfS[listLast(sortArray[ii],delim)]; //return the array return returnArray; }   
The accepted solution (from CFLib.org) is NOT safe. I experimented with this for something I needed to do at work and found that it returns incorrect results when sorting numeric with floats. 
 
 
 
For example if I have these structs: (pseudocode)
 
 a = ArrayNew(1); s = StructNew(); s.name = 'orange'; s.weight = 200; ArrayAppend(a, s); s = StructNew(); s.name = 'strawberry'; s.weight = 28; ArrayAppend(a, s); s = StructNew(); s.name = 'banana'; s.weight = 90.55; ArrayAppend(a, s); sorted_array = arrayOfStructsSort(a, 'weight', 'asc', 'numeric');  
並べ替えられた配列を繰り返し処理し、名前と重みを出力します。正しい順序にはなりません。これは、任意のキーとソートされる値を混在させることの制限です。