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Function: list llListInsertList( list dest, list src, integer start );

Returns a list that contains all the elements from dest but with the elements from src inserted at position start.

• list dest
• list src
• integer start

start supports negative indexes.


Index Positive Negative
First 0 -length
Last length - 1 -1


  • Positive indexes count from the beginning, the first item being indexed as 0, the last as (length - 1).
  • Negative indexes count from the far end, the first item being indexed as -length, the last as -1.


  • If start is out of bounds the script continues to execute without an error message.
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list numbers = [3, "three", 2, "two", 1, "one"];
        llOwnerSay(llDumpList2String(numbers, ","));
        // Object: 3,three,2,two,1,one
        integer index = llListFindList(numbers, [2]);
        if (index != -1)
            numbers = llListInsertList(numbers, [2.5, "two and a half"], index);
            llOwnerSay(llDumpList2String(numbers, ","));
            // Object: 3,three,2.500000,two and a half,2,two,1,one


Bear in mind that the source list will remain unchanged. Instead, a new list will be produced. So, it's important that you capture this with a variable (unless you are acting directly on the results.)

Tip! To insert something at the start of a list, you can just add the two lists (putting the list with the new item(s) first)

list oldList = ["B", "C", "D"];
list newItem = ["A"];
list newlist = newItem + oldList;

See Also


• llDeleteSubList
• llList2List
• llListReplaceList


•  Negative Index

Deep Notes

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function list llListInsertList( list dest, list src, integer start );