Burgaud Posted January 4, 2018 Share Posted January 4, 2018 func sample (ByRef $x, $y, $z) . . . endfunc local $a="text" sample($a,1,2) sample("",5,6) Is it possible to pass a null into a function requiring it like above? If so, how can a function determine if a parameter $x (ByRef) actually exists or was missed out? Link to comment Share on other sites More sharing options...
jdelaney Posted January 4, 2018 Share Posted January 4, 2018 Nope. IEbyXPATH-Grab IE DOM objects by XPATH IEscriptRecord-Makings of an IE script recorder ExcelFromXML-Create Excel docs without excel installed GetAllWindowControls-Output all control data on a given window. Link to comment Share on other sites More sharing options...
iamtheky Posted January 4, 2018 Share Posted January 4, 2018 wouldnt it be easier to take the ByRef off, than attempt to ByRef a null. I kind of want to know what the real world use case is for that tho. ,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-. |(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/ (_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_) | | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) ( | | | | |)| | \ / | | | | | |)| | `--. | |) \ | | `-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_| '-' '-' (__) (__) (_) (__) Link to comment Share on other sites More sharing options...
jchd Posted January 4, 2018 Share Posted January 4, 2018 A ByRef variable always exists, else the function call is erroneous. Null is a value just like 5 or 6 or "text" or $a. In the code below, _vardump is a function of mine (use search to find it) which ... dumps its argument. Func sample(ByRef $x, $y, $z) ConsoleWrite(_vardump($x) & @LF) EndFunc Local $a="text" sample($a, 1, 2) sample("", 5, 6) sample(Null, 5, 6) It yields: String (4) 'text' String (0) '' Keyword Null OTOH this doesn't work, irrespective of the second ByRef attribute: Func sample(ByRef $x, $y, ByRef $z) ConsoleWrite(_vardump($x) & @LF) EndFunc Local $a="text" sample($a, 1) This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
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