Difference between revisions of "ListCompare"
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m (Wanted to add that the == 0 is not required, as the logical negation of the function means that any non-zero value will evaluate to FALSE, while /only/ zero will evaluate to TRUE.) |
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| Line 17: | Line 17: | ||
<lsl>integer ListCompare(list a, list b) { | <lsl>integer ListCompare(list a, list b) { | ||
integer aL = a != []; | integer aL = a != []; | ||
if (aL != (b != [])) return | if (aL != (b != [])) return 0; | ||
if (aL == 0) return | if (aL == 0) return 1; | ||
return !llListFindList((a = []) + a, (b = []) + b); | return !llListFindList((a = []) + a, (b = []) + b); | ||
}</lsl> | }</lsl> | ||
Revision as of 18:28, 17 January 2009
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Summary
Function: integer ListCompare( list a, list b );
Efficiently compares two lists for equality (same contents).
Returns an integer TRUE if the lists are equal, FALSE if not.
| • list | a | – | The first list to compare. | |
| • list | b | – | The second list to compare. |
Examples
<lsl>integer r = ListCompare([1, 2.0, "3"], [1, 2.0, "3"]); // Returns TRUE integer s = ListCompare([1, 2.0, 3], [1, 2.0, "3"]); // Returns FALSE
integer t = ListCompare([], [1, 2.0, "3"]); // Returns FALSE</lsl>Implementation
<lsl>integer ListCompare(list a, list b) {
integer aL = a != []; if (aL != (b != [])) return 0; if (aL == 0) return 1; return !llListFindList((a = []) + a, (b = []) + b);
}</lsl>