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• Are Scala "continuations" just a funky syntax for defining and using Callback Functions?

  - by Alex R

  And I mean that in the same sense that a C/Java for is just a funky syntax for a while loop. I still remember when first learning about the for loop in C, the mental effort that had to go into understanding the execution sequence of the three control expressions relative to the loop statement. Seems to me the same sort of effort has to be applied to understand Continuations (in Scala and I guess probably other languages). And then there's the obvious follow-up question... if so, then what's the point? It seems like a lot of pain (language complexity, programmer errors, unreadable programs, etc) for no gain.

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• Weird behavior of an ASP.NET MVC application - track of errors

  - by Alex

  Before migrating from ASP.NET WebForms I had a very good way to monitor all my application errors in the Events Log (Administrative Tools). But now after moving to asp.net MVC, all I get is the same mistake occurring every minute (something about Site Master). I know it's not right, because there are other mistakes, but they are not displayed. I purposefully put in division by zero operation, and it didn't track it. I had to implement the OnException method of a controller, and send e-mails with error details which is very inconvenient. How can I solve this problem?

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• Unity 2 and Enterprise library configuration tool

  - by nachid

  Hi, Can someone show me how to use Enterprise library configuration tool with Unity2 Whatever I did, when I open the Enterprise library configuration tool, I could not have it working with a Unity config file. When I click on the menu to add a new block, there is no Unity configuration block What am I doing wrong? Thank you for your help

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• Visual Studio Project File Help

  - by Alex Baranosky

  I would like to reconfigure the StyleCop import path in my project file. Currently it looks like this: <Import Project="$(ProgramFiles)\MSBuild\Microsoft\StyleCop\v4.3\Microsoft.StyleCop.targets" /> I would like to include the Microsoft.StyleCop.targets file in my project directory, and thus do something like this: <Import Project="$( ProjectDir)\Microsoft.StyleCop.targets" /> Is something like this possible, if so what is the proper way to do it?

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• Why is this HTTP request continually looping?

  - by alex

  I'm probably overlooking something really obvious here. Comments are in to help explain any library specific code. public function areCookiesEnabled() { $random = 'cx67ds'; // set cookie cookie::set('test_cookie', $random); // try and get cookie, if not set to false $testCookie = cookie::get('test_cookie', false); $cookiesAppend = '?cookies=false'; // were we able to get the cookie equal ? $cookiesEnabled = ($testCookie === $random); // if $_GET['cookies'] === false , etc try and remove $_GET portion if ($this->input->get('cookies', false) === 'false' AND $cookiesEnabled) { url::redirect(str_replace($cookiesAppend, '', url::current())); // redirect return false; } // all else fails, add a $_GET[] if ( ! $cookiesEnabled) { url::redirect(url::current().$cookiesAppend); } return $cookiesEnabled; }

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• Maximum float value in php

  - by Alex Deem

  Is there a way to programmatically retrieve the maximum float value for php. Akin to FLT_MAX or std::numeric_limits< float >::max() in C / C++? I am using something like the following: $minimumCost = MAXIMUM_FLOAT_VALUE??; foreach ( $objects as $object ) { $cost = $object->CalculateCost(); if ( $cost < $minimumCost ) { $minimumCost = $cost; } } (using php 5.2)

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• Can I programatically determine if a PNG is animated?

  - by alex

  I have PNG (as well as JPEG) images uploaded to my site. They should be static (i.e. one frame). There is such thing as APNG. (it will be animated in Firefox). According to the Wikipedia article... APNG hides the subsequent frames in PNG ancillary chunks in such a way that APNG-unaware applications would ignore them, but there are otherwise no changes to the format to allow software to distinguish between animated and non-animated images. Does this mean it is impossible to determine if a PNG is animated with code? If it is possible, can you please point me in the right direction PHP wise (GD, ImageMagick)?

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• Incorporate Wordpress into Kohana 3

  - by alex

  I now need to make a Kohana 3 site have a Wordpress blog. I've seen Kerkness' Kohana For Wordpress, but it seems to be the opposite of what I want. Here are the options I have thought of Style a template to look exactly like the Kohana site (time consuming, non DRY and may not work) Include the blog within an iframe (ugly as all hell) cURL the Wordpress pages in. This of course means I will need to create layers between comment posting, etc, which sounds like too much work. Is there any way I can include a Wordpress blog within an existing Kohana application? Do you have any suggestions? Thanks Update Forgot to mention I have already programmed a model in Kohana to open pages based on their slug. Now I want to put blog content in there, and have the comments and other bits work. I also have installed WP e-Commerce and am wondering if there is any chance I can get that to work.

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• Android SDK: hello world does not run

  - by Alex

  I have installed Java x64, Eclipse Classic Judo x64 + ADT Pluggin. OS win 7 x64. I did installation everything according to the manual. Then created first application and launched it. Emulator was launched but hello world was not. I have not idea what doing wrong. Do anyone knows of such error and my problem as a whole? thx Console log: [2012-10-06 13:35:42 - test] ------------------------------ [2012-10-06 13:35:42 - test] Android Launch! [2012-10-06 13:35:42 - test] adb is running normally. [2012-10-06 13:35:42 - test] Performing com.example.test.MainActivity activity launch [2012-10-06 13:35:42 - test] Automatic Target Mode: launching new emulator with compatible AVD 'AVD_41' [2012-10-06 13:35:42 - test] Launching a new emulator with Virtual Device 'AVD_41' [2012-10-06 13:35:42 - Emulator] Failed to create Context 0x3005 [2012-10-06 13:35:42 - Emulator] emulator: WARNING: Could not initialize OpenglES emulation, using software renderer. [2012-10-06 13:35:42 - Emulator] WARNING: Data partition already in use. Changes will not persist! [2012-10-06 13:35:42 - Emulator] WARNING: SD Card image already in use: C:\Users\Zewisa\.android\avd\AVD_41.avd/sdcard.img [2012-10-06 13:35:42 - Emulator] WARNING: Cache partition already in use. Changes will not persist! [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] could not get wglGetExtensionsStringARB [2012-10-06 13:35:42 - Emulator] emulator: warning: opening audio input failed [2012-10-06 13:35:42 - Emulator]

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• High performance querying - Suggestions please

  - by Alex Takitani

  Supposing that I have millions of user profiles, with hundreds of fields (name, gender, preferred pet and so on...). You want to make searches on profiles. Ex.:All profiles that has age between x and y, loves butterflies, hates chocolate.... With database would you choose? Suppose that You have a Facebook like load. Speed is a must. Open Source preferred. I've read a lot about Cassandra, HBase, Mongo, Mysql... I just can't decide.....

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• How to securely pass credit card information between pages in PHP

  - by Alex

  How do you securely pass credit card information between pages in PHP? I am building an ecommerce application and I would like to have the users to go through the checkout like this: Enter Information - Review - Finalize Order Problem is that I am not sure on how to safely pass credit information from when the user inputs them to when I process it (at the Finalize Order step). I heard using sessions is insecure, even with encryption. Any help would be appreciated!

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• Initalizing an array before initalizing a pointer to that same array

  - by Alex

  I want to initialize an array and then initialize a pointer to that array. int *pointer; pointer = new int[4] = {3,4,2,6}; delete[] pointer; pointer = new int[4] = {2,7,3,8}; delete[] pointer; How can I do this?

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• Use a push button to add a section in an InfoPath form?

  - by Alex

  I'm working on an InfoPath form that's going to be run with InfoPath Forms Services on a SharePoint server. For a number of reasons -- mostly so that the customer can update the form without involving an administrator -- this can't be a form containing .NET code. The form has a repeating group, and we have users who are a bit confused as to how to add and delete items from the repeating section. I've looked all over the Internets, but haven't been able to find a way to do this without adding a code project to the form. Is there any way to write a rule or do something else to make a button that adds an item to a repeating section?

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• Debugging CodeIgniters 404 errors

  - by Alex

  I'm having a nightmare uploading my site to the production server. The site runs fine locally and on a staging server (exactly the same server, settings as the production site). However when I deploy to production I'm getting a 404 error from CI. CodeIgniters 404 error pages are frustrating because it seems as if i can't access other libraries from them. How can I go about debugging the error? See which controller is trying to be called etc.

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• Best tools to download all the html files from a website, nd to reuplaod them

  - by Alex Baranosky

  I need to add two lines of html to every page on a large website. I will be using a regex to do it. I would like to know the best tools to download all the html files from a website, then ftp upload them back up on Windows.

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• Out-of-the-box Eclipse PDT (PHP Development Tool) not capable of debugging PHP, why?

  - by Alex R

  I just finished reinstalling the "All-In-One Eclipse PDT" from zend.com. It's unable to debug even the simplest "Hello World" PHP script. How can such a major open-source app be released in such a bad shape? What am I doing wrong? This is the result of doing a "Debug As...": Problem signature: Problem Event Name: APPCRASH Application Name: php.exe Application Version: 5.2.9.9 Application Timestamp: 49dda267 Fault Module Name: ntdll.dll Fault Module Version: 6.0.6002.18005 Fault Module Timestamp: 49e03824 Exception Code: c0000130 Exception Offset: 0006f04e OS Version: 6.0.6002.2.2.0.768.3 Locale ID: 1033 Additional Information 1: 9d13 Additional Information 2: 1abee00edb3fc1158f9ad6f44f0f6be8 Additional Information 3: 9d13 Additional Information 4: 1abee00edb3fc1158f9ad6f44f0f6be8 Read our privacy statement: http://go.microsoft.com/fwlink/?linkid=50163&clcid=0x0409 I think it wants me to configure some additional stuff, but I have no clue what exactly to do.

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• A textbox class only accept integers in Java

  - by alex

  I just want to do a textbox class onl accepts integers.. I have done something, but i think it's not enough. Can anyone help me, please? Thanks... import java.awt.TextField public class textbox extends TextField{ private int value; public textbox(){ super(); } public textbox(int value){ setDeger(value); } public int getValue() { return value; } public void setValue(int value) { this.value = value; } }

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• Problem with mysql query to replace a string

  - by alex

  I've used mysql's update replace function before, but even though I think I'm following the same syntax, I can't get this to work. Here's what I'm trying to do: UPDATE contained_widgets SET preference_values = REPLACE(preference_values, '<li><a_href="/enewsletter"><span class="not-tc">eNewsletter</span></a></li>', '<li><a_href="/enewsletter"><span class="not-tc">eNewsletter</span></a></li> <li> <a_href="/projects"><span class="not-tc">Projects</span></a></li>'); Query OK, 0 rows affected (0.00 sec) Rows matched: 77 Changed: 0 Warnings: 0 I don't see what I'm missing. Any help is appreciated. I edited "a " to "a_" because the site thinks I'm posting spam links otherwise.

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• linq: SQL performance on high loaded web applications

  - by Alex

  I started working with linq to SQL several weeks ago. I got really tired of working with SQL server directly through the SQL queries (sqldatareader, sqlcommand and all this good stuff).  After hearing about linq to SQL and mvc I quickly moved all my projects to these technologies. I expected linq to SQL work slower but it suprisongly turned out to be pretty fast, primarily because I always forgot to close my connections when using datareaders. Now I don't have to worry about it. But there's one problem that really bothers me. There's one page that's requested thousands of times a day. The system gets data in the beginning, works with it and updates it. Primarily the updates are ++ @ -- (increase and decrease values). I used to do it like this UPDATE table SET value=value+1 WHERE ID=@I'd It worked with no problems obviously. But with linq to SQL the data is taken in the beginning, moved to the class, changed and then saved. Stats.registeredusers++; Db.submitchanges(); Let's say there were 100 000 users. Linq will say "let it be 100 001" instead of "let it be increased by 1". But if there value of users has already been increased (that happens in my site all the time) then linq will be like oops, this value is already 100 001. Whatever I'll throw an exception" You can change this behavior so that it won't throw an exception but it still will not set the value to 100 002. Like I said, it happened with me all the time. The stas value was increased twice a second on average. I simply had to rewrite this chunk of code with classic ado net. So my question is how can you solve the problem with linq

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• How do I write this insert statement in Django?

  - by alex

  newthing = Link(user=request.user,last_updated=datetime.datetime.now()) However, this uses datetime , not the MYSQL "now()". How can I use mysql's now()?

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• Suppose i have an HTML table. How do I use JQuery events on this?

  - by alex

  <table> <tr class="myRow"><td class="col1"></td><td class="col2"></td></tr> <tr class="myRow"><td class="col1"></td><td class="col2"></td></tr> <tr class="myRow"><td class="col1"></td><td class="col2"></td></tr> <tr class="myRow"><td class="col1"></td><td class="col2"></td></tr> <tr class="myRow"><td class="col1"></td><td class="col2"></td></tr> </table> How do I make the appropriate col1 fill with the letters "ABC" when the user rollovers the row? And then disappear the "ABC" when the user moves the mouse away from that row? So far, I got this. I solved it. $(".ep").hover(function(){ $(this).find('td.playButtonCol').html('PLAY'); },function(){ $(this).find('td.playButtonCol').html(''); });

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• What does the /= operator in C# do?

  - by Alex

  What does the /= operator in C# do and when is it used?

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• How to automatically re-run deadlocked transaction? (ASP.NET MVC/MS SQL)

  - by Alex

  I have a very popular site in ASP.NET MVC/MS SQL, and unfortunately a lot of deadlocks occur. While I'm trying to figure out why they occur via the SQL profiler, I wonder how I can change the default behavior of MS SQL Server when doing the deadlocks. Is it possible to re-run the transaction(s) that caused problems instead of showing the error screen?

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• jQuery exception if element doesn't exist

  - by Alex Ivasyuv

  I working with jQuery and I need to get anytime and anywere exception (with any operation), if I attach some event or try to perform some action with elements (got from selector) that don't exist. Is there some internal "strict" mode in jQuery for this issue?

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• Migrate Liferay 5 -> 5.2

  - by Alex Takitani

  We have a liferay portal running on a hosting company, and We want to bring it to our own structure. So, I've downloaded the excellent bitnami stack and loaded it in our vmware server. I've no experience on liferay whatsoever, all I know its that it uses mysql as database. Is there any docs on how to do it? Tks!

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