ListCast

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/LSL

ListCast

listCast

Summary

Function: list listCast( list mixedList, integer type );

Iterates through the contents of a list, producing a resulting list whose contents are cast to a single type. Please refer to llGetListEntryType() for valid types. This function is useful for converting a list to a type which is more memory efficient, or to a type that you know you are going to access a lot (in order to remove extra casting later-on).
Returns a list whose contents are all one type.

• list	mixedList	–	The list to cast, its contents may be anything.
• integer	type	–	The type of variable to cast all entries to.

Examples

<lsl>

       list mixed = [1, 2.0, "3", "Four", (key)"8aef4875-6873-0919-f5ab-c9d6b48d18d4"];

       // Prints: 1, 2, 3, 0, 8
       llOwnerSay(llList2CSV(listCast(mixed, TYPE_INTEGER)));
       // Prints: 1.000000, 2.000000, 3.000000, 0.000000, 0.000000
       llOwnerSay(llList2CSV(listCast(mixed, TYPE_FLOAT)));

</lsl>

Implementation

<lsl>list listCast(list mixedList, integer type) {

   list result = []; integer x = mixedList != [];

   if (type == TYPE_INTEGER) 
       while ((--x) >= 0) 
           result = [(integer)llList2String(mixedList, x)] + result;
   else if (type == TYPE_FLOAT) 
       while ((--x) >= 0) {
           if (llGetListEntryType(mixedList, x) == TYPE_FLOAT) result = [llList2Float(mixedList, x)] + result;
           else result = [(float)llList2String(mixedList, x)] + result;
       }
   else if (type == TYPE_VECTOR) 
       while ((--x) >= 0) {
           if (llGetListEntryType(mixedList, x) == TYPE_VECTOR) result = [llList2Vector(mixedList, x)] + result;
           else result = [(vector)llList2String(mixedList, x)] + result;
       }
   else if (type == TYPE_ROTATION) 
       while ((--x) >= 0) {
           if (llGetListEntryType(mixedList, x) == TYPE_ROTATION) result = [llList2Rot(mixedList, x)] + result;
           else result = [(rotation)llList2String(mixedList, x)] + result;
       }
   else if (type == TYPE_STRING) 
       while ((--x) >= 0) 
           result = [llList2String(mixedList, x)] + result;
   else if (type == TYPE_KEY) 
       while ((--x) >= 0) 
           result = [llList2Key(mixedList, x)] + result;
   else result = mixedList;

   return result;

}</lsl>