Re: Evaluating Valentina in Rev
At 9:06 AM -0800 3/27/2002, Ben Rubinstein wrote: Can anyone give me some pointers towards using Valentina in Revolution (given that I've not used Valentina at all in any other form)? I thought I'd seen an item about what was now bundled with the currentversion - but I can't now track it down. The doc updates for Valentina will be in the final docs version but here's a quick overview of connecting to a Valentina db: revdb_connect(databaseType,[host],databaseName,[userName],[password] \ [,valentinaCacheSize,valentinaMacSerial,valentinaWindowsSerial]) For a Valentina database, you specify Valentina as the databaseType and leave the host, userName, and password empty. For Valentina databases, the databaseName is the path to the file that contains the database. (Note that this is a native file path for the platform - not a Rev-normal, Unix-style file path.) The valentinaCacheSize is the size of the database cache used for Valentina databases. The minimum cache size is 512K. If the valentinaCacheSize is not specified, the database cache is 3 megabytes. The valentinaMacSerial or valentinaWindowsSerial is the serial number that unlocks the Valentina VXCMD. (On Mac OS and OS X systems, specify a valentinaMacSerial and leave the valentinaWindowsSerial parameter empty. On Windows systems, specify a valentinaWindowsSerial and leave the valentinaMacSerial empty.) If no valentinaMacSerial or valentinaWindowsSerial is specified, the connection times out after ten minutes (this is the demo mode). get revdb_connect(Valentina,,::Project:MyVal.vdb \ the serialNumber of this card,) get revdb_connect(Valentina,,G:\data\expense.vdb \ field Valentina serial) 1.1.1rc1 has bundled a demo version of the Valentina engine. This times out ten minutes after connecting. You can license the Valentina VXCMD from Paradigma Software http://www.paradigmasoft.com and supply the serial number, as noted above, to get rid of the timeout. -- Jeanne A. E. DeVoto ~ [EMAIL PROTECTED] http://www.runrev.com/ Runtime Revolution Limited - Power to the Developer! ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Halfway through Mac Classic 1.1.1 Tutorials
At 10:21 AM -0800 3/21/2002, Rob Cozens wrote: 1. Often when trying to copy scripts from the tutorial to the script editor, option-drag to select the text causes the object containing the script to be deselected, which minimizes the script editor window. This also happened when I accidently pressed the command key instead of the option key. Once I reselect the object, the script window opens I can paste the text; but it's disconcerting when it first happens. One way to avoid this is to click the Link icon at the top right of the script editor window, so the editor will remain open even if the object is deselected. (I am not all that happy with the option-drag solution - it's mainly a stopgap until we have drag-and-drop between windows.) B. How does one create an animation where the object changes size or shape instead of position? Just set the object the way you want it in the first and last key frames. The animation will change the object's rect as well as its location continuously through the animation. -- Jeanne A. E. DeVoto ~ [EMAIL PROTECTED] http://www.runrev.com/ Runtime Revolution Limited - Power to the Developer! ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: numerical bug
At 7:30 AM -0800 3/30/2002, Ivers, Doug E wrote: Please be aware that put 10^-1 yields 0.1555 ...if you have previously set the numberFormat to .## or worse. When reporting bugs such as this, it is generally better to note all factors leading to the problem - this avoids both unnecessary alarm (exponentiation doesn't work!) and wasted testing time, and thus makes everyone happier. ;-0 -- Jeanne A. E. DeVoto ~ [EMAIL PROTECTED] http://www.runrev.com/ Runtime Revolution Limited - Power to the Developer! ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: MOD function does not work! So be warned!
It is not the loop, it is addition. Dar, et al: I think there's more to it than that: In on testMod put 249 into var1 put var1 into var2 add 1.0 to var1 repeat 10 add 0.1 to var2 end repeat put (var1=var2)((var1 mod 5)=(var2 mod 5)) end testMod The first test always resolves to true...only the second test yields a false result. -- Rob Cozens CCW, Serendipity Software Company http://www.oenolog.com/who.htm And I, which was two fooles, do so grow three; Who are a little wise, the best fooles bee. from The Triple Foole by John Donne (1572-1631) ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: MOD function does not work! So be warned!
Richard Gaskin of [EMAIL PROTECTED] wrote the following on 3/31/02 10:00 AM Interestingly, when you type put 5 mod 5 (or 255 md 5 or other number divisible by five that fails when inside a loop) into the Message Box the result is 0. Stranger still, if you rewrite the line like this so that the loop var is evaluated outside of the rest of the statement: do put loop tab loop mod 5 return after msg ...you get 0. The reason it works in the msg box is because you are using a different number. Inside the loop the number is 254.99988631316227838397 not the 255 you typed. If you set the numberFormat large enough you will see that loop is never 255. And also your do statement in the loop will fail. The situation is that when you convert .1 to binary and add it to 255 it is actually adding a binary number whose value is a little less than the value of decimal .10. .1 has no exact binary representation. if the increment were some inverse power of two everything would 'work' the way we expect it to. When you were using the do statement you are forcing loop to be converted to a string at the precision of the default numberFormat (since you didn't set it to anything else). This string is 255. When you increase the precision of the numberFormat to max precision the string is 254.99988631316227838397. michael ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: MOD function does not work! So be warned!
On Sunday, March 31, 2002, at 11:54 AM, Rob Cozens wrote: I think there's more to it than that: ... put (var1=var2)((var1 mod 5)=(var2 mod 5)) I think you are right. on mouseUp set the numberFormat to 0.# put (1+.001) linefeed after field Report put (1+.001) = 1 linefeed after field Report end mouseUp --- 1.00111 true Equality between numbers seems to either have a tolerance, round/truncate digits or round/truncate internal bits. (Mathematicians would concerned about the first; the tolerance method means = is not an equivalence relation and transitivity goes out the window.) Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Re: MOD function does not work! So be warned!
Dar Scott of [EMAIL PROTECTED] wrote the following on 3/31/02 11:49 AM It is not the loop, it is addition. Every Revolution number (a priori) has a potential error. This accumulates. (I say a priori because some numbers, can be represented exactly.) It is not a bug. This is just the way MOD and decimal numbers which are represented as binary numbers work. It is not just a Revolution problem. The error does not accumulate. Try summing a million .10. There is no accumulation. Run this handler. on mouseUp set the numberFormat to \ 0.### put .10,.100012,.100013 into inc repeat with j=1 to 3 put item j of inc into incc put 0 into a repeat with i=1 to 10 add incc to a put a into a put 0.i into ii put ii a into line i+(j-1)*10 of fld 1 end repeat end repeat end mouseUp michael ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Change in numbers (was MOD function ...)
On Sunday, March 31, 2002, at 02:10 PM, Ian Summerfield wrote: I'd like to see a change though, something that allows me to define a precision to n decimal places. So would I. I made a recommendation for one way this could be done on the improve list a couple days ago. And an addendum yesterday. You can probably find it in the list archives at runrev.com. (Pretty rash for a newbie, I admit.) It suffers from some limitations. Perhaps it needs scientific notation. Also, base conversion and bit functions might be best improved at the same time. Dar Scott ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
Once were numbers...
On Sunday, March 31, 2002, at 02:10 PM, Ian Summerfield wrote: I'd like to see a change though, something that allows me to define a precision to n decimal places. Sorry to be contrarian but in relation to this now extended thread my principal amazement is at the breathless amazement of the discussants over this issue. I also own an HP49G, which might be considered the ant's pants in programmable graphic engineering calculators. It is not an Infinite Precision machine but is considered accurate to 12 digits (and uses 13 or 14 internally to achieve this). It also has an exact mode in which it returns integer fractions rather than decimal fractions for answers (e.g. enter 5 / 2 and it returns 5/2, not 2.5). If you want precision, temper your expectations with a little knowledge of how computers work and recognise that 15 or more digits of actual precision means deadly accurate answers to 12 decimal places for pretty much anything that might be expected in a language of this nature. The posts which raise problems of equalities are easily fixed if you pay attention to the fact that you are supposed to be comparing to zero or one decimal place (in the examples published). Do those who bemoan this inaccuracy and its influence on the expectations of the over-impressionable ever worry too much about the fact that MS Excel has corresponding internal errors? Amazingly so, of course. It only runs on the same 32-bit computer with the same OS(s). Time for me to retreat under cover before the flying brickbats land. cheers David [post script: not aimed at you, ian, or indeed anyone in particular. I just needed to grab a post as a hook for the reply] ___ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
