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llDeleteSubString

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function
Function syntax
string llDeleteSubString(
  1. string src,// Source string to modify.
  2. integer start_index,// Starting codepoint index of the substring to remove (inclusive). Supports negative indexing.
  3. integer end_index// Ending codepoint index of the substring to remove (inclusive). Supports negative indexing.
);
Returns
string
Energy
10

Returns a copy of the string src with the characters from start_index to end_index (inclusive) removed. Negative indices count backward from the end of the string. If start_index is greater than end_index, the deletion excludes the specified range.

Characters at positions start and end are removed.

Returns a string that is the result of removing characters from src from start to end.

How to use
string result = llDeleteSubString("", 0, 0);

Examples

Section titled “Examples”
Example 1
default
{
    state_entry()
    {
        string ex = "abcdefghi";
        llDeleteSubString(ex, 4, 7); //Incorrect!
    }
}
Example 2
default
{
    state_entry()
    {
        string ex = "abcdefghi";
        ex = llDeleteSubString(ex, 4, 7); //Correct
        llSay(0, ex); //Would say "abcdi"
    }
}
Example 3
//-- special case
default
{
    state_entry()
    {
        string ex = "abcdefghi";
        llSay( 0, llDeleteSubString(ex, 4, 7) ); //Would say "abcdi"
        //-- acceptable if you do NOT want to change the contents of 'ex', only the output
    }
}

Notes

Section titled “Notes”

Indexes start at zero, the index of the first character is zero. Using 0,0 as start and end positions would delete the first character only. Negative indexes count from the far end of the string towards the beginning, so -1 is short form for the last character in a string. Positive and negative indexes can be mixed so using 0, -1 as start and end positions would delete the entire string.

To ascertain how long a string is, use llStringLength.

Granted, wondering how to use this can be bewildering at times: with random text strings being handled by your script, you may wonder how you can know what positions you should be starting and ending the deletion at. llSubStringIndex is the preferred method of finding a string in a string but it can be a rather involved process. If the user just wants to remove all occurrences of a string from a string they may wish to consider simply using Strife Onizuka’s str_replace function instead, to looks for a value without having to know where it starts and ends, and replacing it with "".

Known issues

Section titled “Known issues”

From the issue templates included by the wiki article:

  • SCR-6 (bug): llGetSubString & llDeleteSubString can crash scripts with multi-word characters in Mono.

See also

Section titled “See also”

Functions

Section titled “Functions”

Articles

Section titled “Articles”
Original wiki source

Some wiki templates and tables need their original context. View this article on the Second Life Wiki. Technical wording and examples are retained from the source; historical guidance may differ from current behavior.