Difference between revisions of "LlGetListLength"
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Huney Jewell (talk | contribs) m (Error correction) |
Void Singer (talk | contribs) m (formatted example) |
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|constants | |constants | ||
|examples= | |examples= | ||
< | <lsl> | ||
default | default | ||
{ | { | ||
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} | } | ||
} | } | ||
</ | </lsl> | ||
|notes=A faster and lighter (in bytecode) way to determine the length of a list is to do a not-equals compare with a null list. This works because the list not-equals compare returns the difference between the lengths. | |notes=A faster and lighter (in bytecode) way to determine the length of a list is to do a not-equals compare with a null list. This works because the list not-equals compare returns the difference between the lengths. | ||
< | <lsl> | ||
list in; | list in; | ||
integer len_in = llGetListLength(in); | integer len_in = llGetListLength(in); | ||
| Line 30: | Line 30: | ||
integer fneg_len_in = ([] != in); | integer fneg_len_in = ([] != in); | ||
//fneg_len_in and neg_len_in will be the same | //fneg_len_in and neg_len_in will be the same | ||
</ | </lsl> | ||
|helpers | |helpers | ||
|also_functions= | |also_functions= | ||
Revision as of 20:37, 18 February 2008
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: integer llGetListLength( list src );| 185 | Function ID |
| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns an integer that is the number of elements in the list src.
| • list | src |
Caveats
Examples
<lsl> default {
state_entry()
{
list l = ["one", "two", "three"];
integer i = llGetListLength(l);
llOwnerSay("there are " + (string)i + " entries in the list");
}
}
</lsl>Notes
A faster and lighter (in bytecode) way to determine the length of a list is to do a not-equals compare with a null list. This works because the list not-equals compare returns the difference between the lengths. <lsl> list in; integer len_in = llGetListLength(in); integer flen_in = (in != []); //flen_in and len_in will be the same
integer neg_len_in = -llGetListLength(in); integer fneg_len_in = ([] != in); //fneg_len_in and neg_len_in will be the same </lsl>
See Also
Functions
| • | llListStatistics | – | LIST_STAT_NUM_COUNT – Returns the number of integers and floats in the list | |
| • | llStringLength | – | Returns the number of characters in a string. |
Deep Notes
Source
'linden\indra\lscript\lscript_library\lscript_alloc.cpp' @ lsa_cmp_lists
'linden\indra\lscript\lscript_execute\lscript_execute.cpp' @ list_list_operation
Signature |
|---|
function integer llGetListLength( list src ); |