Re: Split, combine ok but where's extract?
On 14/02/2005, at 4:00, Alex Tweedly [EMAIL PROTECTED] wrote: snip If you take the case of put 1,2 into myArray[a,b] put 1,3 into myarray[c,d] snip Nope. It will actually give v1 = a,c v2 = b,d v3 = 1 v4 = 3 the other value got lost in the split immediately before the assignment to v3; I don't know if it's theoretically guaranteed which of the values it will give, but in practice, with few entries, it will give the latter one. Alex Perhaps I have misunderstood the depth of the problem. I do not appear to have the described difficulty with the example data. Here is code (assume a couple of testing fields, f1 and f2) and the results using your actual example data. put 1,2 into myArray[a,b] put 1,3 into myarray[c,d] put the keys of myArray into field f1 combine myArray with return put myArray into field f2 splits the keys from the data, preserving all components, while (using data from the fields as created above) put field f1 into tData -- the a,b \r c,d data put field f2 into tKeys -- the 1,2 \r 1,3 data split tData with return put 1 into i repeat for each line x in tKeys put tData[i] into myArray[x] add 1 to i end repeat -- and to prove it happened combine myArray with return and # put myArray into field f2 puts them back in an array. The only relevant possibility of duplication appears to be with the keys of the original array, which by definition were not duplicated anyway. I receive the digest so discussions may be slow. regards David -- Alex Tweedly http://www.tweedly.net ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
Xavier, Alex and all. The principal difficulty with the split/combine code I have suggested for extract/merge is that key order is not preserved in relation to the data when you get the keys. If you wish to re-merge after an extract then you must know what is the correct key order (e.g. a simple sort). Oh, and I also reversed the data and keys in the second code block (first two lines) compared with the extract. Mechanical error. regards David ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
David Vaughan wrote: Perhaps I have misunderstood the depth of the problem. I do not appear to have the described difficulty with the example data. The problem (as I understand it) was to split out the columns of the keys and/or the data of an array. That's what the code you first proposed did (or tried to do); the fragment shown in this (tonight's) email is only the first half of the code - and therefore doesn't get far enough into it to demonstrate the problem. Here is code (assume a couple of testing fields, f1 and f2) and the results using your actual example data. put 1,2 into myArray[a,b] put 1,3 into myarray[c,d] put the keys of myArray into field f1 combine myArray with return put myArray into field f2 Indeed, there's no problem there - it would be the next part which dissected the columns of the data that shows the problem. Here's the complete section of code as you first sent it (with a couple of with returns added as you suggested) put the keys of myArray into tKeys split tKeys with return and comma put the keys of tKeys into v1 combine tKeys with return -- discards the keys put tKeys into v2 combine myArray with return -- discards the keys split myArray with return and comma put the keys of myArray into v3 combine myArray with return put myArray into v4 Now, v1=a, v2=b, v3=n1, v4=n2 (or close enough if I made a coding error) i.e. v1 is the first column (of the keys), v2 is the second, v3 is the first column from the data and v4 is the second column from the data. Now if you take my data put 1,2 into myArray[a,b] put 1,3 into myarray[c,d] then run the above algorithm, what you get is v1 = a \r b v2 = c \r d v3 = 1 v4 = 3 which is not what we need - the duplicate item 1 in column 3 (col 1 of the data) caused a problem. snip puts them back in an array. The only relevant possibility of duplication appears to be with the keys of the original array, which by definition were not duplicated anyway. Not really. By definition, the *complete* keys of the original array are not duplicated; but the problem arises because items within any particular column CAN be duplicates. Here's your second code fragment - but with different values to demonstrate the problem put field f1 into tData -- the a,b \r c,d data -- LET's make f1 contain 3,4 \r3,5 put field f2 into tKeys -- the 1,2 \r 1,3 data split tData with return -- causes a problem put 1 into i repeat for each line x in tKeys put tData[i] into myArray[x] add 1 to i end repeat -- and to prove it happened combine myArray with return and # put myArray into field f2 And this shows the problem. The 3rd line split tData with return results in a single array entry, tData[3] = 5, because of the duplication of the 3 - even though 3,4 didn't duplicate 3,5 I receive the digest so discussions may be slow. In some ways this discussion is more complex than it need be - Xavier's second example (including the code he posted) was simply separating out the columns (and merging the columns) of a single columnar table. So the problem is : given a table 1,2,3,4 5,6,7,8 9,10,11,12 generate separate lists of the columns v1 = 1 \r 5 \r 9 (spaces for readability only) v2 = 2 \r 6 \r 10 v3 = 3 \r 7 \r 11 v4 = 4 \r 8 \r 12 This is (in effect) what your initial code proposal would do (adjusting for a table instead of an array), and is also what Xavier's code would do. But given different input 1,2,3,4 5,2,7,8 9,10,11,12 his would give v1 = 1 \r 5 \r 9 (spaces for readability only) v2 = 2 \r 2 \r 10 v3 = 3 \r 7 \r 11 v4 = 4 \r 8 \r 12 and re-merging would get back the original input value. However, your's would give v1 = 1 \r 5 \r 9 (spaces for readability only) v2 = 2 \r 10 v3 = 7 \r 11 v4 = 8 \r 12 and there would be no way to recover the initial value. -- Alex Tweedly http://www.tweedly.net No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 10/02/2005 ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
David Vaughan wrote: Oh, and I also reversed the data and keys in the second code block (first two lines) compared with the extract. Mechanical error. I didn't even notice that :-) Well - that makes it even clearer . here's your second code fragment, with the reversal un-reversed. put field f1 into tKeys -- the a,b \r c,d data(reversal restored) put field f2 into tData -- the 1,2 \r 1,3 data split tData with return (and already there is a problem - tData has a single entry tData[1] = 3 ) put 1 into i repeat for each line x in tKeys put tData[i] into myArray[x] add 1 to i end repeat -- and to prove it happened combine myArray with return and # put myArray into field f2 puts them back in an array. -- Alex Tweedly http://www.tweedly.net No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 10/02/2005 ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
MisterX wrote: Mark, I did say I already wrote a function to extract these but is there no split combination that does this without a slow loop? Here's the two functions I used function MergeColumns end MergeColumns I'm still trying to understand just what that one does (in all cases) so I'll start with the simpler one. function ExtractItems tabl,column,adelimiter if adelimiter is not empty then set the itemdelimiter to adelimiter end if local a put into a local x=1 repeat for each line L in tabl put (item column of l) into line x of a add 1 to x end repeat return a end ExtractItems x is used only to count the number of lines,and changed only when a new line is added the end - so just use put after function ExtractItems tabl,column,adelimiter local a if adelimiter is not empty then set the itemdelimiter to adelimiter end if repeat for each line L in tabl put (item column of L) cr after a end repeat delete the last char of a return a end ExtractItems Of which the MergeColumn could use lots of optimizing ;) But they're slow functions compared to split or combine. I can't see a way to use split/combine (except for the special case of first col). -- Alex Tweedly http://www.tweedly.net -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 10/02/2005 ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
MisterX wrote: I can't see any radically different approach - but you can certainly optimize the details function MergeColumns local xp,y,linecount,z,c put the paramcount into xp put empty into y put empty into linecount repeat with x = 1 to xp put the number of lines in param(x) comma after linecount end repeat delete last char of linecount put max(linecount) into linecount Then either repeat with x = 1 to linecount repeat with y = 1 to xp put line x of param(y) comma after line x of c end repeat delete last char of c end repeat or (probably better) repeat with x = 1 to linecount repeat with y = 1 to xp put line x of param(y) comma after c end repeat delete last char of c put cr after c end repeat It would be worth experimenting with turning the loop inside out repeat with x = 1 to xp put param(x) into theLine repeat with y = 1 to linecount put line y of theLine comma after line y of c end repeat end repeat repeat with y = 1 to linecount delete the last char of line y of c end repeat but I don't think that will be faster. -- Alex Tweedly http://www.tweedly.net -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 10/02/2005 ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
Alex Tweedly wrote: MisterX wrote: or (probably better) repeat with x = 1 to linecount repeat with y = 1 to xp put line x of param(y) comma after c end repeat delete last char of c put cr after c end repeat It would be worth experimenting with turning the loop inside out repeat with x = 1 to xp put param(x) into theLine repeat with y = 1 to linecount put line y of theLine comma after line y of c end repeat end repeat repeat with y = 1 to linecount delete the last char of line y of c end repeat but I don't think that will be faster. Darn, Alex, I got so used to being amazed with your nifty use of arrays I was betting on you coming up with a one-liner for this. :) -- Richard Gaskin Fourth World Media Corporation ___ [EMAIL PROTECTED] http://www.FourthWorld.com ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
On 13/02/2005, at 4:00, MisterX [EMAIL PROTECTED] wrote: Xavier I have not searched back to your original request, but if I understand it correctly then you wish to be able to de-merge columns from an array, and that these columns may be of the data or of the keys. Let us assume you have an array where an element is defined by: put n1,n2 into myArray[a,b] Here, you can extract anything from the keys or the element using split and combine. For example, this code places all four columns in separate variables v1-v4 (untested) put the keys of myArray into tKeys split tKeys with return and comma put the keys of tKeys into v1 combine tKeys -- discards the keys put tKeys into v2 combine myArray -- discards the keys split myArray with return and comma put the keys of myArray into v3 combine myArray put myArray into v4 Now, v1=a, v2=b, v3=n1, v4=n2 (or close enough if I made a coding error) I have a column merge function somewhere. I will look it up to see if it is any improvement over what you have. regards David ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
Moron me! Doing some edits from my test script I omitted the line add 1 to i just before end repeat On 13/02/2005, at 10:43, David Vaughan wrote: Xavier This is the merge part Assume you have the following two variables: v1 contains a v2 contains b split v2 with return put 1 into i repeat for each line x in v1 put v2[i] into myArray[x] end repeat combine myArray with return and comma myArray is now a list whose first line is a,b This code avoids any repeat with i = 1 to n loops and is thus fairly linear in time taken with longer lists. Incidentally, I left with return off a couple of lines in the previous extract code. I have not done any speed tests. Hope this is relevant. regards David ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
RE: Split, combine ok but where's extract?
Just sweet! I'll test it monday (or before) on my 2k lines tables ;) Surely will be shocking and you'll be famous! Gza -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Vaughan Sent: Sunday, February 13, 2005 00:46 To: use-revolution@lists.runrev.com Subject: Re: Split, combine ok but where's extract? Moron me! Doing some edits from my test script I omitted the line add 1 to i just before end repeat On 13/02/2005, at 10:43, David Vaughan wrote: Xavier This is the merge part Assume you have the following two variables: v1 contains a v2 contains b split v2 with return put 1 into i repeat for each line x in v1 put v2[i] into myArray[x] end repeat combine myArray with return and comma myArray is now a list whose first line is a,b This code avoids any repeat with i = 1 to n loops and is thus fairly linear in time taken with longer lists. Incidentally, I left with return off a couple of lines in the previous extract code. I have not done any speed tests. Hope this is relevant. regards David ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
David Vaughan wrote: On 13/02/2005, at 4:00, MisterX [EMAIL PROTECTED] wrote: Xavier I have not searched back to your original request, but if I understand it correctly then you wish to be able to de-merge columns from an array, and that these columns may be of the data or of the keys. Let us assume you have an array where an element is defined by: put n1,n2 into myArray[a,b] Here, you can extract anything from the keys or the element using split and combine. For example, this code places all four columns in separate variables v1-v4 (untested) put the keys of myArray into tKeys split tKeys with return and comma put the keys of tKeys into v1 combine tKeys -- discards the keys put tKeys into v2 combine myArray -- discards the keys split myArray with return and comma put the keys of myArray into v3 combine myArray put myArray into v4 Now, v1=a, v2=b, v3=n1, v4=n2 (or close enough if I made a coding error) I have a column merge function somewhere. I will look it up to see if it is any improvement over what you have. David, I may have missed something in the original problem description, but I think there's a problem with this scheme. If you take the case of put 1,2 into myArray[a,b] put 1,3 into myarray[c,d] I believe what Xavier wants (at least, what his posted code gives - though it used a simple table not keys) is v1 = a,c v2 = b,d v3 = 1,1 v4 = 2,3 Note particularly v3 - using the various repeat forms, it has each item from the column. split/combine will remove duplicates - and hence give v1 = a,c v2 = b,d v3 = 1 v4 = 2,3 There's a similar problem with the merge code - repeated values in a column cause loss of data. -- Alex Tweedly http://www.tweedly.net -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 10/02/2005 ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Split, combine ok but where's extract?
Just wondering if there is a simple way to extract the list of the second key of an array I have an array like array[x]=text1,text2 I need to get either the list of text1 or text 2... I could create more variables but that's not clean in this design of mine. I have an extract function that repeat for each line but is there a better way to extract columns from a table using split, combine or ??? TIA guys! Wish ya'll a great weekend! Xavier -- MonsieurX.com - working on that GUI translator! ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
MisterX- Friday, February 11, 2005, 9:07:06 AM, you wrote: M Just wondering if there is a simple way to extract the list of the second M key of an array repeat for each line theItem in the keys of array put item 2 of array[theItem] after field myField end repeat -- same obviously for item 1 -- -Mark Wieder [EMAIL PROTECTED] ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
Re: Split, combine ok but where's extract?
On 2/11/05 5:53 PM, Mark Wieder [EMAIL PROTECTED] wrote: MisterX- Friday, February 11, 2005, 9:07:06 AM, you wrote: M Just wondering if there is a simple way to extract the list of the second M key of an array repeat for each line theItem in the keys of array put item 2 of array[theItem] after field myField end repeat -- same obviously for item 1 if you don't want duplicates you could try repeat for each line theItem in the keys of array put 1 into uniqueSecondItems[item 2 of theItem] end repeat put the keys of uniqueSecondItems after field myField ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
RE: Split, combine ok but where's extract?
doesn't combine array with comma,return split array with comma,return do somethign like that too? According to the help docs, the split command strips duplicates and should be faster than a loop... This is worth a bit of investigating and testing... -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dick Kriesel Sent: Saturday, February 12, 2005 03:51 To: How to use Revolution Subject: Re: Split, combine ok but where's extract? On 2/11/05 5:53 PM, Mark Wieder [EMAIL PROTECTED] wrote: MisterX- Friday, February 11, 2005, 9:07:06 AM, you wrote: M Just wondering if there is a simple way to extract the list of the M second key of an array repeat for each line theItem in the keys of array put item 2 of array[theItem] after field myField end repeat -- same obviously for item 1 if you don't want duplicates you could try repeat for each line theItem in the keys of array put 1 into uniqueSecondItems[item 2 of theItem] end repeat put the keys of uniqueSecondItems after field myField ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
RE: Split, combine ok but where's extract?
Mark, I did say I already wrote a function to extract these but is there no split combination that does this without a slow loop? Here's the two functions I used function MergeColumns local xp,y,linecount,z,c put the paramcount into xp put empty into y put empty into linecount repeat with x = 1 to xp get param(x) get the number of lines in it put it comma after linecount end repeat delete last char of linecount put max(linecount) into linecount repeat with x = 1 to linecount repeat with y = 1 to xp put line x of param(y) into z put z comma after line x of c end repeat delete last char of c end repeat return c end MergeColumns function ExtractItems tabl,column,adelimiter if adelimiter is not empty then set the itemdelimiter to adelimiter end if local a put into a local x=1 repeat for each line L in tabl put (item column of l) into line x of a add 1 to x end repeat return a end ExtractItems Of which the MergeColumn could use lots of optimizing ;) But they're slow functions compared to split or combine. If you extract the keys from a double array the problem remains in the case of a second key name like array[a,b] where, for example, the b keys have to be extracted. That's why I was wondering if there was a faster function... Cheers Xavier -- http://MonsieurX.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Wieder Sent: Saturday, February 12, 2005 02:54 To: 'How to use Revolution' Subject: Re: Split, combine ok but where's extract? MisterX- Friday, February 11, 2005, 9:07:06 AM, you wrote: M Just wondering if there is a simple way to extract the list of the M second key of an array repeat for each line theItem in the keys of array put item 2 of array[theItem] after field myField end repeat -- same obviously for item 1 -- -Mark Wieder [EMAIL PROTECTED] ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution ___ use-revolution mailing list use-revolution@lists.runrev.com http://lists.runrev.com/mailman/listinfo/use-revolution
