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• Google App Engine - About how much quota does a single datastore put use?

  - by Spines

  The latency for a datastore put is about 150ms (http://code.google.com/status/appengine/detail/datastore/2010/03/11#ae-trust-detail-datastore-put-latency). About how much CPUTime is used by a single datastore put with data size of 100 bytes, into an entity that has only 2 columns, and no indexes? I plan to do some testing with this later today to figure it out, but if anyone already knows that would help me out :). Also, does anyone know about how much extra overhead in CPUTime doing this datastore put through the task queue would be? Note: This is kind of a follow up to this question: http://stackoverflow.com/questions/2421075/google-app-engine-how-reliable-are-the-logs.

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• Remove unnecessary svn:mergeinfo properties

  - by LeonZandman

  When I merge stuff in my repository Subversion wants to add/change a lot of svn:mergeinfo properties to files that are totally unrelated to the things that I want to merge. Questions about this behaviour have been asked before here on Stackoverflow.com, as you can read here and here. From what I understand from the topics mentioned above it looks like a lot of files in my repository have explicit svn:mergeinfo properties on them, when they shouldn't. The advice is to reduce the amount and only put those properties on relevant files/folders. So now my question: how can I easily remove those unneeded properties? I'm using TortoiseSVN, but am reluctant to manually check/fix hundreds of files. Is there an easier way to remove those unnecessary svn:mergeinfo properties? P.S. I'm not looking for C++ SVN API code.

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• Can you suggest good ways of generating URLS for viewing tagged content

  - by rikh

  For example, here on stack overflow the URL http://stackoverflow.com/questions/tagged/javascript+php will give you all questions tagged with javascript and php. The system I have allows tags with spaces in them, so the approach used here would not be a good fit for me. What character would you use to separate the tags, so the URLs are still human readable, google readable and web browser compatible. My gut feeling was to use commas. eg http://example.com/tagged/first+tag,second+tag Any feedback or suggestions would be welcome.

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• asp.net and Visual studio root directory question

  - by Mark Kadlec

  I am seeing something very odd and thought I would ask the Stackoverflow community if they knew the answer. I have an asp.net project that runs fine in one environment, but couldn't figure out what happened to the styles in another environment. In the first environment (Windows 2008 Server), the following link worked fine: <link href="/Styles/09/style.css" rel="stylesheet" type="text/css" /> but in the other environment (it's a Windows 7), I had to change it to work: <link href="../Styles/09/style.css" rel="stylesheet" type="text/css" /> Notice that the directories seemed to shift ahead one directory in the Win7, what's going on? It's like the "running" directory seems now be the \bin directory instead of the home! Which environment is configured correctly? How do I determine execution directory level? My concern going forward is pushing to a prod environment and guessing which configuration is correct. Any insight would be appreciated!

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• javascript inherance? with Private vars and methods too

  - by Totty

  Hy i need to inherent a class from another. Parent has private var "_data" and private method "_test" and public method "add" Now the child have a public method "add", that uses the private method from the parent "_test" and the private var "_data". How do i do this? var Parent = function(){ var _data = {}; var _test = function(){alert('test')}; this.add = function(){alert('add from parent')} } var Child = function(){ this.add = function(){// here uses the _data and _test from the Parent class alert('add from child') } } // something to inherent Child from Parent // instance Child and use the add method And i think im miss the prototype concept (http://stackoverflow.com/questions/892467/javascript-inheritance)

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• How we run a .NET 32-bit application in a 64-bit Windows server?

  - by Geo

  We are installing a third party application in one of our 64-bit Windows servers. This application apparently was build with the compiler option set to choose the platform at run time. When we run the application it gives us an error: System.BadImageFormatException: is not a valid Win32 application. I have seen in MSDN forums that in order to fix this error I have to build the application set to 32-bit, and that way it will run fine on a 64-bit server. I check on other StackOverflow links Other Posts. How to get around this situation? For everyone that wants to know more information: The application is running fine in a 32-bit test server. IIS version 6 using SQL Server Express 2005 On the Web Service Extension there are both Framework64\v2.0.50727\aspnet_isapi.dll and Framework\v2.0.50727\aspnet_isapi.dll

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• How can we get unique elements from any ORDER BY DECREASING OR INCREASING

  - by Mohit

  Code given below is taken from the stackoverflow.com !!! Can anyone tell me how to get the array elements order by decreaseing or increasing !! plz help me !!! Thanks in advance $contents = file_get_contents($htmlurl); // Get rid of style, script etc $search = array('@<script[^>]*?>.*?</script>@si', // Strip out javascript '@<head>.*?</head>@siU', // Lose the head section '@<style[^>]*?>.*?</style>@siU', // Strip style tags properly '@<![\s\S]*?--[ \t\n\r]*>@' // Strip multi-line comments including CDATA ); $contents = preg_replace($search, '', $contents); $result = array_count_values( str_word_count( strip_tags($contents), 1 ) ); print_r($result);

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• libxml2 install error: command 'gcc' failed with exit status 1? What are the dependencies of libxml2

  - by SIA

  Hi everybody!! I am trying to install libxml2 on unbuntu 9.10 and getting errors: $ sudo python setup.py develop Its a very lengthy error message but the last error is Setup script exited with error: Command 'gcc' failed with exit status 1. Can anybody tell me why i am getting this error? What are the dependencies or libraries required to install this? scenario: I am trying to setup the reddit.com clone, and when i run develop command, its generating a huge error as stated above. Please help!! Thanks in advance And my many thanks to Stackoverflow team for having such a life saving site.

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• What is the .NET attribuet to not compile a method is release mode

  - by Russ

  I know that if I have a block of code I don't want compiled when in release mode I can wrap that code block in: #if DEBUG while(true) { Console.WriteLine("StackOverflow rules"); } #endif This will keep this code block from compiling in any mode other than DEBUG. I know there is an attribute that can be placed on an entire method that will do that same, but for the life of me I can't remember what that attribute is. I believe that it’s down the System.Diagnostics namespace, but I'm not really sure. BTW: I'm using .NET 4, but I know this attribute existed in .NET 2 because I have used in in old projects. Thanks

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• Good IM/Chat solution for pasting code

  - by Matt Miller

  We've got several distributed developers working together on a couple of projects. We've been using Skype to host chats with all the developers, and it works okay except for one thing: It REALLY mangles any code we copy and paste into the chats -- especially the whitespace in Python. This question has tons of opinions about chat clients & servers, but no one has much to say about pasting in code. (http://stackoverflow.com/questions/36415/best-chat-im-tool-for-developers) Is anybody out there using a chat or im client that handles source code really well?

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• Process every pair in a sequence

  - by Henry Jackson

  I'm looking for a concise way to process every (unordered) pair of elements in a sequence in .NET. I know I can do it with nested foreach loops, but I was looking for something a little more readable. I was imagining something like a modified Any() extension method: IEnumerable<Transaction> transactions = ... if (transactions.AnyPair( (first, second) => first.UniqueID == second.UniqueID)) throw ... Or maybe a foreach-style one: IEnumerable<JigsawPiece> pieces = ... pieces.ForEachPair( (first, second) => { TryFit(first, second); }); This question has been asked for other languages (e.g. see http://stackoverflow.com/questions/942543/operation-on-every-pair-of-element-in-a-list), but I'm looking for a .NET solution.

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• Why does concatenating strings in the argument of EXEC sometimes cause a syntax error in T-SQL?

  - by Tim Goodman

  In MS SQL Server Management Studio 2005, running this code EXEC('SELECT * FROM employees WHERE employeeID = ' + CAST(3 AS VARCHAR)) gives this error: Incorrect syntax near 'CAST' However, if I do this, it works: DECLARE @temp VARCHAR(4000) SET @temp = 'SELECT * FROM employees WHERE employeeID = ' + CAST(3 AS VARCHAR) EXEC(@temp) I found an explanation here: http://stackoverflow.com/questions/1044831/t-sql-cannot-pass-concatenated-string-as-argument-to-stored-procedure According to the accepted answer, EXEC can take a local variable or a value as its argument, but not an expression. However, if that's the case, why does this work: DECLARE @temp VARCHAR(4000) SET @temp = CAST(3 AS VARCHAR) EXEC('SELECT * FROM employees WHERE employeeID = ' + @temp) 'SELECT * FROM employees WHERE employeeID = ' + @temp sure looks like an expression to me, but the code executes with no errors.

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• Get notified about the change in raw data in hard disk sector - File change notification

  - by Nuv

  I'm trying to make a software that backups my entire hard drive. I've managed to write a code for reading the raw data from hard disk sectors. However, i want to have incremental backups. For that i need to know the changed made to OS settings, file changes, everything. My question is - Using FileSystemWatcher and Inotify, will i be able to know every change made to every sector in the hard drive ? (OS settings etc) I'm coding it in C++ for linux and windows. (Saw this question on Stackoverflow which gave me some idea)

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• Looking for Google Reader javscript commands for controlling events

  - by JayCrossler

  I've played in the /reader/ui/ code for a few hours now, and couldn't figure this out. Also, I didn't see any exact help when searching StackOverflow. This is really a JavaScript un-obfuscator question. I'm looking for a way to call the obfuscated Google Reader javascript commands... and am having trouble determining what actual function is called when the "Next Items" button is pressed or the spacebar is hit. I've tried using Firebug as well as FireEvents to track it down, but it's just too well hidden. Any ideas? Something that I could type into the URL bar and make it run, something like 'javascript:SH("entries-down", "click");void(0);' Thanks in advance! And, please let me know if it's against Google's terms of service to de-obfuscate their code to view these JavaScript commands.

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• problem in below table:i had table inside table .my inner table contains some text.

  - by Ayyappan.Anbalagan

  Heading ## <tr style=" width:500px; float:left;"> <td style="border: thin ridge #008000; text-align:left;" align="left"; > <table class="" style=" border: 1px solid #800000; width:200px; float:left; height: 200px;"> <tr> <td>&nbsp;stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow&nbsp; </td> </tr> </table> stackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow stackoverflowstackoverflow statackoverflow sta</td> </tr> </table>

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• Templating Engine to Generate Simple Reports in .NET

  - by dr. evil

  I'm looking for a free templating engine to generate simple reports. I want some basic features such as : Ability to Write Loops (with any IEnumerable) Passing Variables Passing Templates Files (main template, footer, header) I'll use this to generate reports in HTML and XML. I'm not looking for a ASP.NET Template Engine. This is for a WinForms applications. I've seen this question http://stackoverflow.com/questions/340095/can-you-recommend-a-net-template-engine, however all of those template engines are total overkill for me and focused for ASP.NET. Please only recommend free libraries. // I'm still looking an NVelocity but it doesn't look any promising for .NET, overly complicated, when you download it's bunch of files not clear what to do, no tutorial, startup document etc.

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• How to program three editions Light, Pro, Ultimate in one solution

  - by Henry99

  I'd like to know how best to program three different editions of my C# ASP.NET 3.5 application in VS2008 Professional (which includes a web deployment project). I have a Light, Pro and Ultimate edition (or version) of my application. At the moment I've put all in one solution with three build versions in configuration manager and I use preprocessor directives all over the code (there are around 20 such constructs in some ten thousand lines of code, so it's overseeable): #if light //light code #endif #if pro //pro code #endif //etc... I've read in stackoverflow for hours and thought to encounter how e.g. Microsoft does this with its different Windows editions, but did not find what I expected. Somewhere there is a heavy discussion about if preprocessor directives are evil. What I like with those #if-directives is: the side-by-side code of differences, so I will understand the code for the different editions after six months and the special benefit to NOT give out compiled code of other versions to the customer. OK, long explication, repeated question: What's the best way to go?

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• dozer custom convertors for primitive types

  - by koti

  the below url has an example on dozer custom convertors.. http://stackoverflow.com/questions/1931212/map-collection-size-in-dozer but when i tried that example its giving the exception like this.. Type: null Source parent class: dozerPackage.Source Source field name: images Source field type: class java.util.ArrayList Source field value: [www, eee] Dest parent class: dozerPackage.Destination Dest field name: numOfImages Dest field type: int org.dozer.MappingException: Destination Type (int) is not accepted by this Custom Converter (dozerPackage.TestCustomFieldConverter)! is there any way that i can return the primitive types from dozer custom convertors..

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• Virtual Private Server Hosting with Windows Server 2008 + MS SQL

  - by Kyle LeNeau

  I have seen this question pop-up on stackoverflow a few times but haven't found a good solution yet. I am looking for recommendations on Virtual Private Server Hosting featuring Windows Server 2008 plus MS SQL database capabilities. I have seen people suggest webhost4life.com, hostmysite.com and others but they do not offer windows server 2008 hosting, only 2003. I have also looked at mosso and aspnix.com. Mosso seems like a good move, but an hoping to find something below $100 a month and I have heard extremel mixed reviews on aspnix.com. Thanks for the help.

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• Tkinter mouse event initially triggered

  - by user3714884

  I'm currently learning Tkinter and I cannot find a solution for my problem here nor outside Stackoverflow. In a nutshell, all events that I bind to my widgets are triggered initialy and don't respond to my actions. In this example, the red rectangle appears on the canvas when I run the code, and color=random.choice(['red', 'blue']) revealed that the event binding doesn't work after that: import Tkinter as tk class application(tk.Frame): def __init__(self, master=None): tk.Frame.__init__(self, master) self.can = tk.Canvas(master, width=200, height=200) self.can.bind('<Button-2>', self.draw()) self.can.grid() def draw(self): self.can.create_rectangle(50, 50, 100, 100, fill='red') app = application() app.mainloop() I use a Mac platform, but I haven't got a clue about its role in the problem. Could anyone please point me at the mistake i did here?

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• Where would I use a bitwise operator in JavaScript?

  - by J-P

  I've read this (http://stackoverflow.com/quest...), so I know what bitwise operators are but I'm still not clear on how one might use them... Can anyone offer any real-world examples of where a bitwise operator would be useful in JavaScript? Thanks. Edit: Just digging into the jQuery source I've found a couple of places where bitwise operators are used, for example: (only the & operator) // Line 2756: event.which = (event.button & 1 ? 1 : ( event.button & 2 ? 3 : ( event.button & 4 ? 2 : 0 ) )); // Line 2101 var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;

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• Why don't I have access to setReadDataOnly() or enableMemoryOptimization() in PHPExcel?

  - by Edward Tanguay

  I've downloaded PHPExcel 1.7.5 Production. I would like to use setReadDataOnly() and enableMemoryOptimization() as discussed in their forum here and in stackoverflow questions. However when I use them, I get a Call to undefined method error. Is there another version or some plugin or library that I have not installed? What do I have to do to access these methods? $objPHPExcel = PHPExcel_IOFactory::load("data/".$file_name); $objPHPExcel->setReadDataOnly(true); //Call to undefined method $objPHPExcel->enableMemoryOptimization(); //Call to undefined method

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• How can I execute a bunch of editor commands stored in a file in VIM?

  - by LES2

  I have read the other posts, e.g., http://stackoverflow.com/questions/1830886/vim-executing-a-list-of-editor-commands and others. The answer isn't clear to me for my case. I have some editor commands that I generated from an SQL query. It uses :s/foo/bar to change country codes (from FIPS to a non-standard code set). Here's a sample of the file: :s/CB/CAMBO :s/CQ/NMARI :s/KV/KOSOV :s/PP/PAPUA ... I have saved that in a file called fipsToNonStd.vim (unsure about the correct extension). I want to run those commands one after another. What's the easiest way to do so? Thanks a bunch! SO Rocks!

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• PHP is not returning me a number type

  - by Tristan

  Hello, i tryed to follow that great tutorial (STAR rating with css : http://stackoverflow.com/questions/1987524/turn-a-number-into-star-rating-display-using-jquery-and-css) but i've just a big problem : When i do <span class="stars">1.75</span> or $foo='1.75'; echo '<span class="stars">'.$foo.'</span> the stars is correctly shown, but as soon as i do : while($val = mysql_fetch_array($result)) { $average = ($val['services'] + $val['serviceCli'] + $val['interface'] + $val['qualite'] + $val['rapport'] ) / 5 ; <span class="stars">.$average.</span> } the stars stops working i double checked the data type in mysql : they're all TINYINT(2) and i tryed that : $average = intval($average); but it's still not working, Thank you

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• What are the advantages / disadvantages of a Cloud-based / Web-based IDE?

  - by Gabe

  I'm writing this as DevConnections in Las Vegas is happening. Visual Studio 2010 has been released and I now have this 3GB beast installed to my machine. (I'll admit, it has some nice features.) However, while the install was monopolizing my computer's resources I began to wish that my IDE worked more like Google Documents (instantly available, available anywhere, easy to share, easy to collaborate, naturally versioned). A few Google (and StackOverflow) searches led me to : Coderun Bespin I'm well aware that these IDE's are missing a lot of what exists in VS 2010. However, that isn't my question. Instead, I'm wondering what benefits a web-based IDE might have? Assuming a company invests the time to create the missing features, what is the downside?

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