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• Is there a single Git command to get the current tag, branch and commit?

  - by Koraktor

  I'm currently using a collection of three commands to get the current tag, branch and the date and SHA1 of the most recent commit. git describe --always --tag git log -1 --format="%H%n%aD" git rev-parse --abbrev-ref HEAD Which will output something like: 1.2.3-gdeadbeef deadbeef3b8d90071c24f51ac8f26ce97a72727b Wed, 19 May 2010 09:12:34 +0200 master To be honest, I'm totally fine with this. But I'm using these commands from Maven and anyone who'd used Maven before, knows how much things like external commands bloat the POM. I just want to slim down my pom.xml and maybe reduce execution time a bit.

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• Why does Perl complain "Can't modify constant item in scalar assignment"?

  - by joe

  I have this Perl subroutine that is causing a problem: sub new { my $class = shift; my $ldap_obj = Net::LDAP->new( 'test.company.com' ) or die "$@"; my $self = { _ldap = $ldap_obj, _dn ='dc=users,dc=ldap,dc=company,dc=com', _dn_login = 'dc=login,dc=ldap,dc=company,dc=com', _description ='company', }; # Print all the values just for clarification. bless $self, $class; return $self; } what is wrong on this code : i got this error Can't modify constant item in scalar assignment at Core.pm line 12, near "$ldap_obj,"

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• is it good practice to use iframe to implement header/navbar?

  - by Xah Lee

  is it good practice to use iframe to implement header/navbar? my website is basically 5 thousand pages but all static html (not using any content manager, php, etc.). am in the process to add a navbar at the top of each page. e.g. tabs, or crumbs, or any sort of header with js menu. (the exact design not decided yet) my question is, is it good practice to use a iframe for this? (so, instead have same text repeated in all 5 thousand pages, each will just have a short iframe pointing to a header file) am aware that one should reduce http request for speed, but this is ok with me. Any other problems i might have with this? SEO or any tech issue?

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• Perl Regex Mismatch Issue

  - by Russell C.

  This is a really basic regex question but since I can't seem to figure out why the match is failing in certain circumstances I figured I'd post it to see if anyone else can point out what I'm missing. I'm trying to pull out the 2 sets of digits from strings of the form: 12309123098_102938120938120938 1321312_103810312032123 123123123_10983094854905490 38293827_1293120938129308 I'm using the following code to process each string: if($string && $string =~ /^(\d)+_(\d)+$/) { if(IsInteger($1) && IsInteger($2)) { print "success ('$1','$2')"; } else { print "fail"; } } Where the IsInterger() function is as follows: sub IsInteger { my $integer = shift; if($integer && $integer =~ /^\d+$/) { return 1; } return; } This function seems to work most of the time but fails on the following for some reason: 1287123437_1268098784380 1287123437_1267589971660 Any ideas on why these fail while others succeed? Thanks in advance for your help!

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• Image rotate to mouse using Jquery and CSS

  - by James

  I have a compass image and am trying to get the needle to follow the mouse around the page, exactly how the images are rotated in the following demo but without having to shift and click. I'm having trouble breaking down that code however, so any help would be most appreciated. Thanks in advance. http://www.elated.com/res/File/articles/development/javascript/jquery/smooth-rotatable-images-css3-jquery/ The images are simply wrapped in a div <div id="content"> <img id="compass" src="compass.png"/> <img id="needle" src="needle.png"/> </div>

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• Parallelizing a serial algorithm

  - by user643813

  Hej folks, I am working on porting a Text mining/Natural language application from single-core to a Map-Reduce style system. One of the steps involves a while loop similar to this: Queue<Element>; while (!queue.empty()) { Element e = queue.next(); Set<Element> result = calculateResultSet(e); if (!result.empty()) { queue.addAll(result); } } Each iteration depends on the result of the one before (kind of). There is no way of determining the number of iterations this loop will have to perform. Is there a way of parallelizing a serial algorithm such as this one? I am trying to think of a feedback mechanism, that is able to provide its own input, but how would one go about parallelizing it? Thanks for any help/remarks

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• mysql_fetch_assoc data to COOKIE in user browser

  - by Gowtham Raj

  I had data in mysql, where it does not need any security. I had a sql query string to get the data out every time using mysql_fetch_assoc. So, I planed to store data in users browser.To reduce no of quires to sql. if (!isset($_COOKIE['countries'])){ $query = "SELECT iso,name FROM sel_country"; $countries = mysql_query($query); setcookie('countries', serialize($countries), time()+3600); }else{ $countries = $unserialize($_COOKIE['countries']); } while ($row = mysql_fetch_assoc($countries)) {echo $row['name']} But, When cookie is set it is showing following error Fatal error: Function name must be a string in /home/worlds/public_html/index/ctrl.php on line 15 My cookie in browser displaying content as i%3A0%3B Please help me out, how should i go?

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• Why use a do-end block in Lua?

  - by Mayron

  I keep trying to find answers for this but fail to do so. I wanted to know, what is the do-end block actually used for? It just says values are used when needed in my book so how could I use this? Do I use it to reduce the scope of local variables by placing a function in a do-end loop and place local variables outside of the function but inside this do-end block and the variables will be seen by the function? But then can the function still be called? Sorry for being very vague. I hope that makes sense. Maybe an illustrated example might be useful ^^

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• Why is the code adding 7 if the number is not >= 0

  - by Hugo Dozois

  I've got this program in MIPS assembly which comes from a C code that does the simple average of the eigth arguments of the function. average8: addu $4,$4,$5 addu $4,$4,$6 addu $4,$4,$7 lw $2,16($sp) #nop addu $4,$4,$2 lw $2,20($sp) #nop addu $4,$4,$2 lw $2,24($sp) #nop addu $4,$4,$2 lw $2,28($sp) #nop addu $2,$4,$2 bgez $2,$L2 addu $2,$2,7 $L2: sra $2,$2,3 j $31 When the number is positve, we directly divided by 8 (shift by 3 bits), but when the number is negative, we first addu 7 then do the division. My question is why do we add 7 to $2 when $2 is not >= 0 ? EDIT : Here is the C code : int average8(int x1, int x2, int x3, int x4, int x5, int x6, int x7, int x8) { return (x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8) / 8; } note : the possible loss in the division since we are using ints instead of floats or doubles is not important in this case.

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• How to quickly access documentation in Xcode 4.5.1?

  - by International Frog

  How can I quickly access the documentation for a symbol, method, enum, etc. in Xcode 4.5? alt + click on symbol shows a quick-info. Apple removed the dictionary icon which opened the documentation. I tried all other possible shortcuts of the cmd / alt / shift / click mumbo jumbo dance and none of them open the documentation browser. I suppose there is a hidden trick to quickly open it anyways? Edit: Figured out this new quick-info box has a link to the documentation.

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• Double data entry system using Infopath 2007 how to compare 2 infopath documents for differences ?

  - by bugBurger

  How to compare 2 infopath documents craeted using double data entry system for differences ? We have a small project contains few infopath forms. Client is using double data entry system to reduce the errors. We are maintaining entry number in infopath form to seperate each entry. Note: I know we can compare xml data files of 2 documents. (xml data file has field names like field1,field2 and so on..while on form that field1 represent some meaninngful text) But the question is we want to compare it Visually side by side. Any difference should highlight the field.

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• MySQL ODBC error "server has gone away"

  - by digitala

  Occasionally we're seeing an error from ASP pages: Microsoft OLE DB Provider for ODBC Drivers error '80004005' [MySQL][MyODBC 5.00.11][MySQL] 2006 MySQL server has gone away We're handling it the best way we can in ASP but it still crops up. I think it's more to do with the MySQL ODBC driver than the ASP code. We never see this with PHP code we also have running under the same IIS server, however PHP re-connects each time it is ran, whereas I believe the ODBC driver connects once and stays connected. I've checked the settings in the driver but there doesn't seem to be anything I can change to help mitigate the problem. Can anyone explain why this is happening and how to reduce the number of times it happens?

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• Improving MySQL Update Query Efficiency

  - by Russell C.

  In our database tables we keep a number of counting columns to help reduce the number of simple lookup queries. For example, in our users table we have columns for the number of reviews written, photos uploaded, friends, followers, etc. To help make sure these stay in sync we have a script that runs periodically to check and update these counting columns. The problem is that now that our database has grown significantly the queries we have been using are taking forever to run since they are totally inefficient. I would appreciate someone with more MySQL knowledge than myself to recommend how we can improve it's efficiency: update users set photos=(select count(*) from photos where photos.status="A" AND photos.user_id=users.id) where users.status="A"; If this were a select statement I would just use a join but I'm not sure if that is possible with update. Thanks in advance for your help!

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• Why doesn't splicing an object from an array in Javascript return the array?

  - by Allen Gould

  I have an array of objects (say, a deck of cards): var deck = []; deck.push(new Card(suit, rank)); The following seems to work: var card = deck.pop(); var card = deck.shift(); (pulling from the "top" or "bottom" of the deck respectively) But if I want a card from the middle (say, if this was a hand of cards) var card = deck.splice(2,1); The object doesn't seem to get properly assigned to the variable (everything is undefined). Everything I look up says that splice should return the object that I'm removing - what am I missing?

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• PHP: Loop through text file and isolate lines which a specific "starting point"

  - by Mestika

  Hi everyone, I’m trying to reduce some editing time within some textfiles where there approximately are 10.000 lines of text, but I only need around 200 or some. The text file relies on a almost specific pattern but it deviates from time to time but my “focus” in order to select the right line to keep is, that the line always starts with: z3455 and then have a variable afterwards, e.g.: z3455 http://url.com/data1/data1.1/data1.3/ (342kb) I have an algorithm to capture the URL and its content but now I need some way to loop through the text file, deleting all lines except does that starts with z3455 and then “push” them together so they are listed underneath each other. I’ve tried different approaches for this in PHP but can’t seem to find a correct function. I can “isolate” a specific line number but when it deviates I can’t use this approach fully. I hope that someone can help me, either by providing the code or knocking me in the right direction to how I’ll solve this problem. Thanks in advance Sincerely - Mestika

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• Is vbscripting that difficult?

  - by eric young

  I need to write some vbscripts in my new project. I was told by other people that vbscripting is easy, but seems to me, it is not. For example, in the following example (provided by microsoft), these functions: CreateObject, CreateShortcut, as well as these property names: TargetPath, WindowStyle, Hotkey, etc, are used, but I just cannot find the corresponding API documentation about how to use them. In other words, how do you know you need to call these functions in your vbscripts? Visual Studio 2008/2010 do not have templates for vbscript either. Could anybody tell me what I am missing, and what the best way is to do vbscripting? set WshShell = WScript.CreateObject("WScript.Shell") strDesktop = WshShell.SpecialFolders("Desktop") set oShellLink = WshShell.CreateShortcut(strDesktop _ & "\MyExcel.lnk") oShellLink.TargetPath = _ "C:\Program Files\Microsoft Office\OFFICE11\EXCEL.EXE" oShellLink.WindowStyle = 1 oShellLink.Hotkey = "CTRL+SHIFT+F" oShellLink.IconLocation = _ "C:\Program Files\Microsoft Office\OFFICE11\EXCEL.EXE, 0" oShellLink.Description = "My Excel Shortcut" oShellLink.WorkingDirectory = strDesktop oShellLink.Save

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• Best Automation Frame work design

  - by Vijay Prasath

  Using Nunit Frame work or Creating Visual studio Test Projects which one is the best way to save the time and effective automation? Now i am using selenium IDE to script the maximum parts in my application to reduce the time of execution(i feel ide execution is faster than test project execution) using gotoif, while, regexp ..etc and would go Selenium RC only for data driven methods and the events which have not been handled by IDE. Please suggest me Am i in the right way? because i am in the beginning stage on Automating my applications asking this Question for early correction is better.

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• Profiling and Graphics.updateDisplay0()

  - by AD

  I am profiling my BlackBerry application (a game) with the options 'In method only' and 'Time including native method'. Under the 'All methods' node (after a decent run of the game) the single most time consuming function is Graphics.updateDisplay0() with over 50% of the run time spent there. I don't quite know what is the purpose of that function or if I can do anything to reduce its processing time, so if anyone can shed some light on the matter, I would be grateful. Because from what I understand with the 'In method only' option, it means there is some processing within that function. ps. there is no information on that function in the documentation.

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• How do I indent multiple lines at once in Notepad++?

  - by cdeszaq

  In many text editors that are aimed at programmers, if the user has a selection that spans more than 1 line and presses the TAB key, those lines are indented by 1 TAB (or a number of spaces, depending on how the editor is configured). However, this does not seem to be the default behavior of Notepad++. Is there a way I can do this in Notepad++, or is there a plugin that I can get to allow me to do this? Edit: Upon additional testing, shift-tab correctly un-indents the lines as expected, but only a tab simply inserts a tab wherever the carat is. This is in version 5.4.5 Unicode

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• efficient video format/codec for sparse & binary blob tracking

  - by user391339

  I am working on a blob tracking project and have many high-definition videos that I would like to reduce in size for storage and downstream tracking/shape-analysis. I want to use a lossless method that takes advantage of the black and white nature of the video as well as the fact that not much is moving between individual frames. The videos are quite sparse, with 5 to 10 b&w blobs per frame occupying <30% of the space in total, with each blob moving <5-10% of the field of view between frames and not changing shape too much between 2-3 frames. I will work in Python, Matlab, or LabView for this project, and could use a batch utility if available. It may be worthwhile to export the files as compressed image stacks if a proper video format can't be found. What are the pros and cons of this? A video codec uses correlations between neighboring frames, so it should be more efficient, but not if the wrong one is chosen or if it is improperly configured.

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• JavaScript constructors inside a namespace

  - by Joe

  I have read that creating a namespace for JavaScript projects helps to reduce conflicts with other libraries. I have some code with a lot of different types of objects for which I have defined constructor functions. Is it good practice to put these inside the namespace as well? For example: var shapes = { Rectangle: function(w, h) { this.width = w; this.height = h; } }; which can be called via: var square = new shapes.Rectangle(10,10);

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• Why does Google Page-Speed say that elements need compressing, when they already are compressed?

  - by Peter Snow

  My page is compressed using the following in .htaccess <ifModule mod_gzip.c> mod_gzip_on Yes mod_gzip_dechunk Yes mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$ mod_gzip_item_include handler ^cgi-script$ mod_gzip_item_include mime ^text/.* mod_gzip_item_include mime ^application/x-javascript.* mod_gzip_item_exclude mime ^image/.* mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.* </ifModule> Yslow says that the page and specifically the elements which Page-Speed is complaining about, are compressed and it gives the page an overall score of 90/100. Why then, does Page-Speed say that Compressing the following resources with gzip could reduce their transfer size by 118.8KiB (70% reduction). and it gives the page an overall score of 33/100?

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• How easy would it be to refactor a small JSP/Servlet/JDBC project to SpringMVC/Hibernate

  - by John

  With reference to this post, I am considering starting a new web-based Java project. Since I don't know Spring/Hibernate I was concerned if it's a bad plan to start learning them while creating a new project, especially since it will slow down the early development. One idea I had was to write a prototype using tech I do know, namely JSP/Servlets/JDBC, since I can get this running much quicker with my current knowledge. I could then throw the whole thing away and start over with Spring, etc, but I'd like to consider how easy it would be to refactor a smallish project from JSP/Servlets/JDB to SpringMVC/Hibernate? My DB could of course be re-used but what about other code... would I expect to save most of it plugged into an MVC framework, or is the paradigm shift big enough this would cause more trouble than it avoids? Please use the other question for more general advice on choosing technologies

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• Sorting 1000-2000 elements with many cache misses

  - by Soylent Graham

  I have an array of 1000-2000 elements which are pointers to objects. I want to keep my array sorted and obviously I want to do this as quick as possible. They are sorted by a member and not allocated contiguously so assume a cache miss whenever I access the sort-by member. Currently I'm sorting on-demand rather than on-add, but because of the cache misses and [presumably] non-inlining of the member access the inner loop of my quick sort is slow. I'm doing tests and trying things now, (and see what the actual bottleneck is) but can anyone recommend a good alternative to speeding this up? Should I do an insert-sort instead of quicksorting on-demand, or should I try and change my model to make the elements contigious and reduce cache misses? OR, is there a sort algorithm I've not come accross which is good for data that is going to cache miss?

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• Uniforme distance between points

  - by Reonarudo

  Hello, How could I, having a path defined by several points that are not in a uniform distance from each other, redefine along the same path the same number of points but with a uniform distance. I'm trying to do this in Objective-C with NSArrays of CGPoints but so far I haven't had any luck with this. Thank you for any help. EDIT I was wondering if it would help to reduce the number of points, like when detecting if 3 points are collinear we could remove the middle one, but I'm not sure that would help.

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