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• Java: how to get mercurial current changeset number for use in program

  - by Rabarberski

  I've recently started using mercurial for version control in a Java project. When I run my program, the input parameters it has used to produce certain a output, are written to a specific file. It would be nice if I could add the current mercurial changeset number (indicating the version of my program) to that output file as well. What would be the easiest way to do so on Windows? I could write a simple Java parser to fetch the output of the first line of the hg log -l 1 command, but perhaps there is an easier way (i.e., less code lines)?

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• Java - JPA - @Version annotation

  - by Yatendra Goel

  I am new to JPA. I am cofused about the @Version annotation. How it works? I have googled it and found various answers whose extract is as follows: JPA uses a version field in your entities to detect concurrent modifications to the same datastore record. When the JPA runtime detects an attempt to concurrently modify the same record, it throws an exception to the transaction attempting to commit last. But still I am not sure how it works? ================================================================================== Also as from the following lines: You should consider version fields immutable. Changing the field value has undefined results. Does it mean that we should declare our version field as final

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• Cocos 2D v1.0.1 : Crash at changing CCMenuItemImage normal image

  - by Max

  I retrieve a crash log file, which, after XCode analysis on my archive show the problematic line of code : Date/Time: 2012-12-08 23:48:08.930 +0100 OS Version: iPhone OS 5.1.1 (9B206) Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x00000000, 0x00000000 Crashed Thread: 0 Last Exception Backtrace: 0 CoreFoundation 0x31a4088f __exceptionPreprocess + 163 1 libobjc.A.dylib 0x3188b259 objc_exception_throw + 33 2 CoreFoundation 0x31a40789 +[NSException raise:format:] + 1 3 Foundation 0x374c73a3 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 91 4 Killer 0x0017ed35 -[CCSprite initWithFile:] (CCSprite.m:201) 5 Killer 0x0017e419 +[CCSprite spriteWithFile:] (CCSprite.m:93) 6 Killer 0x00123101 -[Player makeZombie] (Player.m:1363) 7 Killer 0x00105a51 -[PlayScene endOfKilling:] (PlayScene.m:1438) Which clearly indicates the second of the two following lines is crashing: NSLog(@"images %@ %@",self.zombieImage,self.zombieImageDown); [self.characterSprite setNormalImage:[CCSprite spriteWithFile:self.zombieImage]]; I know that the crash seem to happend when the user is touching the corresponding CCMeanuItemImage, is there a problem if the user is touching it, while we change the normal et selected images of it ? Is this the right manner to change its image (i do it several times during the game) ? Thanks for your ideas

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• Working with Form Array's in Coldfusion?

  - by Jakub

  I have no idea how to handle this in coldfusion 9, I have a form being submitted (POST) with element checkboxes, called items[]. When I do a <cfdump var="#form#" /> no-problem, I get all the items shown with the proper names like items[] eg: struct ITEMS[] 13,14 FIELDNAMES ITEMS[] however doing a <cfdump var="#form.items[]#" /> results in an error. How do I access the CF9 field values? Somehow loop through it? I cannot seem to do anything with the array to get the id's out of it? Thoughts, I'm kindof stumped and coldfusion isn't the easiest language to find examples / references on the net ;) Is there a correct way to deal with this? I need to get the ID's out of there so I can referenc what lines were checked in the form, so I can follow up with an action. Thanks!

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• Counting unique values in a column with a shell script

  - by Lilly Tooner

  Hello. I have a tab delimited file with 5 columns and need to retrieve a count of just the number of unique lines from column 2. I would normally do this with Perl/Python but I am forced to use the shell for this one. I have successfully in the past used *nix uniq function piped to wc but it looks like I am going to have to use awk in here. Any advice would be greatly appreciated. (I have asked a similar question previously about column checks using awk but this is a little different and I wanted to separate it so if someone in the future has this question this will be here) Many many thanks! Lilly

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• C# - Realtime console output redirection

  - by Levo

  I'm developing a C# application and I need to start an external console program to perform some tasks (extract files). What I need to do is to redirect the output of the console program. Code like this one does not work, because it raises events only when a new line is writen in the console program, but the one I use "updates" what's shown in the console window, without writting any new lines. How can I raise an event every time the text in the console is updated? Or just get the output of the console program every X seconds? Thanks in advance!

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• Lining up the text in a tool tip, with the text in a combobox

  - by Steve P

  I see a lot of programs where if the text doesn't fit inside the bounds of the control, you can put your mouse over the control and the tooltip text will show you the full unclipped text, and also the tooltip text lines up completly with the text in the control. I'm trying to do that with a combobox in VB 2005 (.net version 2.0). In the tooltip draw event I've tried setting the tooltip location to the location of the AssociatedControl.DisplayRectangle, and the AssociatedControl.ClientRectangle. Each of these seem to put the tooltip text in the top left corner of the combobox, just slightly offset from the text in the combobox. Is there some type of padding I need to account for? or what's going on here?

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• CSV parser in C++

  - by User1

  All I need is a good CSV file parser for C++. At this point it can really just be a comma-delimited parser (ie don't worry about escaping new lines and commas). The main need is a line-by-line parser that will return a vector for the next line each time the method is called. I found this article which looks quite promising: http://www.boost.org/doc/libs/1_35_0/libs/spirit/example/fundamental/list_parser.cpp I've never used Boost's Spirit, but am willing to try it. Is it overkill/bloated or is it fast and efficient? Does anyone have faster algorithms using STL or anything else? Thanks!

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• How can I speed up Netbeans Task Marker resolution?

  - by Stephen

  I'm trying to quickly navigate and fix problems in code in Netbeans, and it just takes too long. I'll fix a problem, and it will take seconds to re-compile. While this is happening, the marker remains, and all the others that depend on it will too (requiring multiple next-marker key strokes to get to a "new" problem). If I'm doing a fix that changes the number of lines (e.g. organise imports), the markers will navigate to the wrong place, even though the correct text is underlined. Is there a way to speed this up? I presume it's because it's doing a full file compilation via javac to calculate the markers. BUT the information is available in netbeans, because the correct text is underlined, even when the compilation occurs.

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• How to make last line of each table's part unfinished in latex longtable?

  - by diver_ru

  I have a table that automatically stretched over several pages by longtable package. \begin{longtable}{| l | l |} \hline A & B \\ \hline \endfirsthead \multicolumn{3}{l}{Table \thetable{} -- finishing} \\ \hline \endhead a1 & b1 \\ \hline a1 & b2 \\ hline ........ \end{longtable} Suppose that table broken (automatically) between first and second lines. Now i have this: ------- |A | B| ------- |a1|b1| ------- <page break> Table 1 -- finishing. ------- |a2|b2| ------- I want the following effect: ------- |A | B| ------- |a1|b1| <page break> Table 1 -- finishing. ------- |a2|b2| ------- I.e. last line of broken part should be unfinished.

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• How can I view javadocs that have been added to a maven repository?

  - by Coderer

  I know I can use maven to pull the javadocs for an artifact (if they've been added), which should come through as a JAR (right?), which I can then unpack and browse. My problem is, I'm trying to figure out which of a series of artifacts have the particular package I'm hunting for. I could download a half-dozen javadoc packages, unpack all of them, then open the index files one at a time, but that sounds like it would be pretty unpleasant. There must be a better way! I noticed that Nexus supports javadoc artifact browsing, but apparently only in the Pro version (which we do not have, and are unlikely to get any time soon). I'd prefer a GUI solution, though I'd settle for a command line answer, provided it's something along the lines of showmethedocs groupId:artifactId [version].

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• Selectively parsing log files using Java

  - by GPX

  I have to parse a big bunch of log files, which are in the following format. SOME SQL STATEMENT/QUERY DB20000I The SQL command completed successfully. SOME OTHER SQL STATEMENT/QUERY DB21034E The command was processed as an SQL statement because it was not a valid Command Line Processor command. EDIT 1: The first 3 lines (including a blank line) indicate an SQL statement executed successfully, while the next three show the statement and the exception it caused. darioo's reply below, suggesting the use of grep instead of Java, works beautifully for a single line SQL statement. EDIT 2: However, the SQL statement/query might not be a single line, necessarily. Sometimes it is a big CREATE PROCEDURE...END PROCEDURE block. Can this problem be overcome using only Unix commands too? Now I need to parse through the entire log file and pick all occurrences of the pair of (SQL statement + error) and write them in a separate file. Please show me how to do this!

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• How to get rid of a JQUERY APPEND GIve the following code...

  - by nobosh

  Given the following lines of code which is using JQTOUCH: $('#customers').bind('pageAnimationEnd', function(e, info){ if (!$(this).data('loaded')) { $('.loadingscreen').css({'display':'block'}); $(this).append($('<div> </div>'). load('/mobile/ajax/customers/ .info', function() { $(this).parent().data('loaded', true); $('.loadingscreen').css({'display':'none'}); })); } }); How can I get ride of the .append($(' '). It used to be append($('loading') but I didn't need that and now it seems like a waste of processing time to have in the function. Is it possible?

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• better for-loop syntax for detecting empty sequences?

  - by Dmitry Beransky

  Hi, Is there a better way to write the following: row_counter = 0 for item in iterable_sequence: # do stuff with the item counter += 1 if not row_counter: # handle the empty-sequence-case Please keep in mind that I can't use len(iterable_sequence) because 1) not all sequences have known lengths; 2) in some cases calling len() may trigger loading of the sequence's items into memory (as the case would be with sql query results). The reason I ask is that I'm simply curious if there is a way to make above more concise and idiomatic. What I'm looking for is along the lines of: for item in sequence: #process item *else*: #handle the empty sequence case (assuming "else" here worked only on empty sequences, which I know it doesn't)

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• How to get rid of library references problem? Java

  - by Nitesh Panchal

  Hello, I created a web application and it used several libraries once upon a time. So i added them but later on i found alternative and actually better ways to do the same things. So i removed references from my project for those jars and libraries. Everything works fine but when i move the same project to my friend's laptop Netbeans 6.8 simply doesn't let me deploy the project and gives the whole bundle of errors of libraries that i used previously but i don't now. I removed all references from build.impl file and then when i deploy it, it works fine. But when i do a clean and build and try to deploy it, build.impl automatically again adds those lines of xml which contain references to libraries an again gives me a whole long list of errors. How do i get rid of this? I am really tired of these silly errors. Thanks in advance :)

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• how to write a text file after the previous line in c#??

  - by riad

  Dear all, My below code create a txt file and write something to that file.but i need to write new line after the previous lines when i run the script several times. code: string filePath = "D:\\DOT_NET\\C#\\abc.txt"; FileInfo t = new FileInfo(filePath); StreamWriter Tex = t.CreateText(); Tex.WriteLine("Hi freinds"); Tex.WriteLine("csharpfriends is the new url for c-sharp"); Tex.Write(Tex.NewLine); Tex.Close(); current output on the abc.txt file: Hi friends csharpfriends is the new url for c-sharp but i need the output if i run the script several times. Hi friends csharpfriends is the new url for c-sharp Hi friends csharpfriends is the new url for c-sharp Hi friends csharpfriends is the new url for c-sharp How can i do that? Pls help thanks Riad

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• Porting library from Java to Python

  - by Mike Griffith

  I'm about to port a smallish library from Java to Python and wanted some advice (smallish ~ a few thousand lines of code). I've studied the Java code a little, and noticed some design patterns that are common in both languages. However, there were definitely some Java-only idioms (singletons, etc) present that are generally not-well-received in Python-world. I know at least one tool (j2py) exists that will turn a .java file into a .py file by walking the AST. Some initial experimentation yielded less than favorable results. Should I even be considering using an automated tool to generate some code, or are the languages different enough that any tool would create enough re-work to have justified writing from scratch? If tools aren't the devil, are there any besides j2py that can at least handle same-project import management? I don't expect any tool to match 3rd party libraries from one language to a substitute in another.

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• Python Textwrap - forcing 'hard' breaks

  - by Tom Werner

  I am trying to use textwrap to format an import file that is quite particular in how it is formatted. Basically, it is as follows (line length shortened for simplicity): abcdef <- Ok line abcdef ghijk <- Note leading space to indicate wrapped line lm Now, I have got code to work as follows: wrapper = TextWrapper(width=80, subsequent_indent=' ', break_long_words=True, break_on_hyphens=False) for l in lines: wrapline=wrapper.wrap(l) This works nearly perfectly, however, the text wrapping code doesn't do a hard break at the 80 character mark, it tries to be smart and break on a space (at approx 20 chars in). I have got round this by replacing all spaces in the string list with a unique character (#), wrapping them and then removing the character, but surely there must be a cleaner way? N.B Any possible answers need to work on Python 2.4 - sorry!

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• Is there a semantic difference <span>'s and <div>'s?

  - by DavidR

  I know when coding HTML, I'm supposed to keep semantics in mind, e.g., h1 needs to be a main header, h2 needs to be a subheader, tables need to be tables, use <em> for emphasis instead of <i>, etc. Is there a proper difference between divs and spans except one is a block and the other is in-line? When I was learning I was told that <span>'s were for styling text mid-line. If I had a small blurb of text that I needed positioned at a certain point in my webpage, one that doesn't warrent a <p> tag, would I use a span should I stick with div's? What if that text needs to cover two lines (i.e., it needs a width) if it contains nothing but text, what should I use?

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• Single SQL Server Result Set from Query

  - by JamesC

  Hi Please advise on how to merge two results in to one using SQL Server 2005. I have the situation where an Account can have up to two Settlement Instructions and this have been modeled like so: The slim-ed down schema: Account --------------------- Id AccountName PrimarySettlementId (nullable) AlternateSettlementId (nullable) SettlementInstruction ---------------------- Id Name The output I want is a single result set with a select statement something along the lines of this which will allow me to construct some java objects in my Spring row mapper: select Account.Id as accountId, Account.AccountName as accountName, s1.Id as primarySettlementId, s1.Name as primarySettlementName, s2.Id as alternateSettlementId, s2.Name as alternateSettlementName I've tried various things but cannot find a way to get the result set merged in to one where the primary and alternate FK's are not null. Finally I have searched the forum, but nothing quite seems to fit with what I need.

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• C++: conjunction of binds?

  - by Helltone

  Suppose the following two functions: #include <iostream> #include <cstdlib> // atoi #include <cstring> // strcmp #include <boost/bind.hpp> bool match1(const char* a, const char* b) { return (strcmp(a, b) == 0); } bool match2(int a, const char* b) { return (atoi(b) == a); } Each of these functions takes two arguments, but can be transformed into a callable object that takes only one argument by using (std/boost)bind. Something along the lines of: boost::bind(match1, "a test"); boost::bind(match2, 42); I want to be able to obtain, from two functions like these that take one argument and return bool, a callable object that takes two arguments and returns the && of the bools. The type of the arguments is arbitrary. Something like an operator&& for functions that return bool.

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• How can CopyOnWriteArrayList be thread-safe?

  - by Shooshpanchick

  I've taken a look into OpenJDK's sources of CopyOnWriteArrayList and it seems that all write operations are protected by the same lock and read operations are not protected at all. As I understand, under JMM all accesses to a variable (both read and write) should be protected by lock or reordering effects may occur. For example, set(int, E) method contains these lines (under lock): /* 1 */ int len = elements.length; /* 2 */ Object[] newElements = Arrays.copyOf(elements, len); /* 3 */ newElements[index] = element; /* 4 */ setArray(newElements); The get(int) method, on the other hand, only does return get(getArray(), index);. In my understanding of JMM, this means that get may observe the array in an inconsistent state if statements 1-4 are reordered like 1-2(new)-4-2(copyOf)-3. Do I understand JMM incorrectly or is there any other explanations on why CopyOnWriteArrayList is thread-safe?

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• Compiling C Source with Makefile in Windows

  - by humoeba

  I'm trying to compile a downloaded program in Windows. The program is usually run in Linux, but is programmed to also run in Windows (the code has #if defined(_WIN32)'s in it, and claims to work with borland free tools). When I try to use make from the command line, it tells me "Incorrect command line argument: -C". In the makefile, there are many lines that say "make -C" followed by a directory name. Does this syntax not work in Windows? What is a correct way to do this? Is there any way to compile this for native use in Windows with this makefile?

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• Android. Playing multiple sounds using SoundManager

  - by Jerry

  Shown are a few lines of code. If I play a single sound, it runs fine. Adding a second sound causes it to crash. Any advice is appreciated. private SoundManager mSoundManager; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.sos); mSoundManager = new SoundManager(); mSoundManager.initSounds(getBaseContext()); mSoundManager.addSound(1,R.raw.dit); mSoundManager.addSound(1,R.raw.dah); Button SoundButton = (Button)findViewById(R.id.SoundButton); SoundButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { mSoundManager.playSound(1); mSoundManager.playSound(2); } }); }

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• Python text file processing speed issues

  - by Anonymouslemming

  Hi all, I'm having a problem with processing a largeish file in Python. All I'm doing is f = gzip.open(pathToLog, 'r') for line in f: counter = counter + 1 if (counter % 1000000 == 0): print counter f.close This takes around 10m25s just to open the file, read the lines and increment this counter. In perl, dealing with the same file and doing quite a bit more (some regular expression stuff), the whole process takes around 1m17s. Perl Code: open(LOG, "/bin/zcat $logfile |") or die "Cannot read $logfile: $!\n"; while (<LOG>) { if (m/.*\[svc-\w+\].*login result: Successful\.$/) { $_ =~ s/some regex here/$1,$2,$3,$4/; push @an_array, $_ } } close LOG; Can anyone advise what I can do to make the Python solution run at a similar speed to the Perl solution? I've tried just uncompressing the file and dealing with it using open instead of gzip.open, but that made a very small difference to the overall time.

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