ListXnotY: Difference between revisions
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You should initialize the variable when you declare it, as the compiler will implicitly initialize it. Implicit initialization isn't as readable as explicit, which is what examples should be: readable |
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| Line 13: | Line 13: | ||
integer n = llGetListLength(lx); | integer n = llGetListLength(lx); | ||
for (; i < n; i++) | for (; i < n; i++) | ||
if (llListFindList(ly,llList2List(lx,i,i)) == -1) | if (llListFindList(ly,llList2List(lx,i,i)) == -1) | ||
lz += llList2List(lx,i,i); | |||
return lz; | return lz; | ||
} | } | ||
Revision as of 10:53, 12 January 2010
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Function: list ListXnotY(list lx, list ly);
Show what x list has that y list is missing.
See also: Lists
<lsl> list ListXnotY(list lx, list ly) {// return elements in X list that are not in Y list
list lz = [];
integer i = 0;
integer n = llGetListLength(lx);
for (; i < n; i++)
if (llListFindList(ly,llList2List(lx,i,i)) == -1)
lz += llList2List(lx,i,i);
return lz;
}
</lsl>
Example:
<lsl> list l1 = ["a","b","c","d"]; list l2 = ["a","1","b","2","c","3"];
default{
state_entry() {
llSay(0, "X list has this in it, but Y list doesn't: " + llList2CSV(ListXnotY(l1,l2)) );
//will say: d
}
} </lsl>
Posted with the kind permission of Very Keynes, who originated this script June 2007 in the SL scripters forum http://forums.secondlife.com/showthread.php?t=194138