LlDeleteSubString

Function notes

Characters at positions start and end are removed.

Return value notes

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

Examples

default
{
    state_entry()
    {
        string ex = "abcdefghi";
        llDeleteSubString(ex, 4, 7); //Incorrect!
    }
}

default
{
    state_entry()
    {
        string ex = "abcdefghi";
        ex = llDeleteSubString(ex, 4, 7); //Correct
        llSay(0, ex); //Would say "abcdi"
    }
}

//-- 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

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 "".

Shared wiki helpers

The original page also injects shared parameter notes, caveats or issue information through these helpers. Their conditional MediaWiki logic is not reproduced here; inspect the preserved helper source for additional material.

Template:LSL Function/negative index

Original shared helper source (conditional wiki logic is not evaluated)

{{LSL Injection Test}}<noinclude>
Format:
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Exclude p1, p2, or p3 if not used.

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{{#vardefine:t|{{#ifeq:{{{1|{{#var:ni_mode}}}}}|true|{{#switch:{{#var:ni_c}}|3|2=LSL_Function/negative_index/range|1=LSL_Function/negative_index/single}}}}}}

{{{{#var:t}}|{{{2|{{#var:ni_p1}}}}}|{{{3|{{#var:ni_p2}}}}}|{{{4|{{#var:ni_p3}}}}}|noExclude={{{noExclude|}}}}}

{{#if:{{{noSpec|}}}||
{{#vardefine:spec|{{#var:spec}}
{{#if:{{#var:t}}|
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{{!}}-{{Hl2}}
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! Positive
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{{!}}-
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{{!}} <code>-{{{length|length}}}</code>
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{{!}} <code>-1</code>
{{!}}}
=== Indexes ===
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<div style="display:table;"><div style="display:block;">
*Negative indexes count from the far end, the first item being indexed as <code>-{{{length|length}}}</code>, the last as <code>-1</code>. 
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}}
}}
}}

{{#vardefine:also_articles|{{#var:also_articles}}
{{#if:{{#var:t}}|{{LSL_DefineRow||{{LSLGC|Negative_Index{{#var:lang}}|Negative Index}}|}}}}}}

{{#vardefine:header_footnote|{{#var:header_footnote}}{{PBR}}
{{#vardefineecho:ni_ps|{{#switch:{{#var:ni_c}}
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  |3={{LSLP|{{{2}}}}}, {{LSLP|{{{3}}}}} & {{LSLP|{{{4}}}}}
 }}}} {{#if:{{#var:t}}| support{{#ifexpr:{{#var:ni_c}}>1||s}}| ''do{{#ifexpr:{{#var:ni_c}}>1||es}} not'' support }} {{LSLGC|Negative_Index{{#var:lang}}|negative indexes}}.{{PBR}}
}}

{{#vardefine:footer|{{#var:footer}}
{{#if:{{#var:t}}|{{#ifeq:{{NAMESPACE}}|Template||{{#if:{{#var:self}}{{{self|}}}{{#pos:{{#var:moded}}|r}}{{#pos:{{#var:moded}}|u}}||{{LSLC|Negative Index{{#var:lang}}}}}}}}|
{{#if:{{#var:self}}{{{self|}}}{{#pos:{{#var:moded}}|r}}{{#pos:{{#var:moded}}|u}}||{{LSLC|Positive_Index_Only{{#var:lang}}}}}}
}}}}

{{#vardefine:caveats|{{#var:caveats}}
{{#if:{{{nc|{{#var:ni_nc}}}}}||
* If {{#switch:{{#var:ni_c}}
 |3=either {{LSLP|{{{2}}}}}, {{LSLP|{{{3}}}}} or {{LSLP|{{{4}}}}} are
 |2=either {{LSLP|{{{2}}}}} or {{LSLP|{{{3}}}}} are
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{{#if:{{#var:t}}|{{#ifexpr:{{#var:ni_c}}>1|{{#if:{{{noExclude|}}}|* {{LSLP|{{{2}}}}} & {{LSLP|{{{3}}}}} will not form an [[#exclusion_range|exclusion range]] when {{LSLP|{{{2}}}}} is past {{LSLP|{{{3}}}}} (Approximately: {{LSLP|{{{2}}}}} > {{LSLP|{{{3}}}}}), instead it will act as if {{LSLP|{{{2}}}}} was zero & {{LSLP|{{{3}}}}} was -1.|* {{LSLP|{{{2}}}}} & {{LSLP|{{{3}}}}} will form an [[#exclusion_range|exclusion range]] when {{LSLP|{{{2}}}}} is past {{LSLP|{{{3}}}}} (Approximately: {{LSLP|{{{2}}}}} > {{LSLP|{{{3}}}}}). }}}}}}
}}}}

}}<noinclude>
==Debugging==
{| {{Prettytable}}
|-{{Hl2}}
! #var
! value
|-
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|-
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|-
{{VarPair|caveats}}
|-
{{VarPair|notes}}
|-
{{VarPair|constants_nb}}
|-
{{VarPairTable|also_articles}}
|-
{{VarPair|footer}}
|}
</noinclude>

Template:Issues/SCR-6