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  • Why cast null before checking if object is equal to null?

    - by jacerhea
    I was looking through the "Domain Oriented N-Layered .NET 4.0 Sample App" project and ran across some code that I do not understand. In this project they often use syntax like the following to check arguments for null: public GenericRepository(IQueryableContext context,ITraceManager traceManager) { if (context == (IQueryableContext)null) throw new ArgumentNullException("context", Resources.Messages.exception_ContainerCannotBeNull); Why would you cast null to the type of the object you are checking for null?

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  • Export to word from php doesn't seem to work for me...

    - by chandru_cp
    I exported data from php page to word document but the problem is the header is not available in all pages.... Header is present in the first page but not in the next pages of the word document..... Here is my code, function changeDetails() { $bType = $this->input->post('textvalue'); if($bType == "word") { $this->load->library('table'); $data['countrytoword'] = $this->AddEditmodel1->export(); $this->table->set_heading('Name','Country','State','Town'); $out = $this->table->generate($data['countrytoword']); header("Content-Type: application/vnd.ms-word"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-disposition: attachment; filename=$cur_date.doc"); echo '<br><br>'; echo '<strong>CountryList</strong><br><br>'; print_r($out); } } <? if(isset($countrytoword)) { ?> <table align="center" border="0"> <tr> <td> Name </td> <td> Country </td> <td> State </td> <td> Town </td> </tr> <? foreach($countrytoword as $dsasffd) { ?> <tr> <td><?= $dsasffd['dbName'] ?></td> <td><?= $dsasffd['dbCountry']; ?></td> <td><?= $dsasffd['dbState']; ?></td> <td><?= $dsasffd['dbTown']; ?></td> <? } } ?> </tr> </table>

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  • ubuntu 64 or 32 bit for macbook/vps?

    - by ajsie
    i've got macbook pro and wonder if i should use 64 or 32 bits ubuntu server? and then i've got a vps not hosted by med. how do i know what version to choose? how do you check how many bits your cpu i working with? can i use 64 on 32 and vice versa?

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  • how to solve syntax error in procedure in mysql?

    - by Shooter
    Hi all, i am executing a procedure in mysql, procedure is- delimiter $$ create procedure getFacility (in id int, out MyFacility VARCHAR(200)) begin select Facility into MyFacility from facilities where FacilityID = id ; end $$ delimiter ; and it is giving error below- Error Code : 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'end $$ delimiter' at line 1 (0 ms taken) how to solve this error? Thanks, Yugal

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  • Quetion regarding local and global variable in javascript

    - by caramel1991
    Today,I started to code a page that prompt the user to choose their PC spec,and the code is as follow <html> <title>Computer Specification Chooser</title> <head> <script type="text/javascript"> var compSpec = document.compChooser; function processorUnavailable_onclick() { alert("Sorry that processor speed is currently unavailable"); compSpec.processor[2].checked = true; } </script> </head> <body> <form name="compChooser"> <p>Tick all components you wan included on your computer</p> <p> DVD-ROM <input type="checkbox" name="chkDVD" value="DVD-ROM" /> <br /> CD-ROM <input type="checkbox" name="chkCD" value="CD-ROM" /> <br /> Zip Drive <input type="checkbox" name="chkZIP" value="ZIP DRIVE" /> </p> <p> Select the processor speed you require <br /> <input type="radio" name="processor" value="3.8" /> 3.8 GHZ <input type="radio" name="processor" value="4.8" onclick="processorUnavailable_onclick()" /> 4.8 GHZ <input type="radio" name="processor" value="6" /> 6 GHZ </p> <input type="button" name="btnCheck" value="Check Form" /> </form> </body> </html> The problem I'm facing is on the function that I've tie to the event handler,when I try to choose the radio button of the processor value 4.8 GHZ,yes it alert me with the message inside the function,but after that,it doest not execute the next statement inside the function,that is to check the next processor value 6 GHZ,I've try my effort to change it and test on it,and find out when I set the var compSpec = document.compChooser as a local variable inside the function instead of a global variable,the next statement could be executed.But I thought for a global variable,it is accessible in everywhere on the page and also inside a function.But why now I can't accesses it inside my function??Any idea??Besides,I stumble upon a weird article while googling,it says that when a global variable is created,it is added to window object.I just curious why this happen??And what's the benefits and uses of it??THANK YOU

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  • Find all <a>s to who's href points to an image with XPath 1.0

    - by Jeffrey Aylesworth
    First, I can assume that all urls that end with jpeg, jpg, bmp, png or gif are images, and others aren't. I thought of, and tried two solutions: Matching the regular expression .(jpe?g|bmp|png|gif)$ Using ends-with to check each separately But, it appears that neither of these exist in XPath 1.0, or at least, they don't exist in Firefox (I am writing a greasemonkey script, so it is only important for the path to work in Firefox).

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  • Working with Content Shell on windows 7

    - by JAre
    I can't run Content Shell on my system (Windows 7 x64): When i run --dump-render-tree with the stable release content_shell.exe crashes with message: [XXXX:XXXX:0522/XXXXXX:XXXXXXXXX:FATAL:content_main_runner.cc(735)] Check failed: base::i18n::InitializeICU() were X - some number. And i can't run dev build because it misses mojo_system.dll. Is there any way to fix it? Does it work on Linux or MacOS? If so i probably can run it in VM For the time being.

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  • What is the performance of "Merge" clause in sql server 2008?

    - by ziang
    Hi, Merge can performs insert, update, or delete operations on a target table based on the results of a join with a source table. For example, you can synchronize two tables by inserting, updating, or deleting rows in one table based on differences found in the other table. Is anyone familiar with the performance to use "Merge" versus the traditional logic to check existence and decide the update or insert then? Thanks!

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  • Trouble with arrays

    - by Ockonal
    Hi guys, I have such string in PHP: $data = '1;3;5;7;9'; And cycle: for ($i=0; $i < count($someArray); $i++) { // If $i == any number in $data } What is the faster way to compare $i from cycle with numbers in string. I have to check that cycle-counter is in string.

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  • Example of a RoboCup 3D Soccer bot?

    - by Drew Noakes
    I'd like to write a bot to play in the 3D RoboCup simulated soccer league. Can anyone point me at some code that already deals with communication with the server, etc? Ideally this would be .NET code, but an example produced in any language would still be useful. EDIT For anyone who is not familiar with the RoboCup 3D Soccer league, check out this YouTube video. It has some pretty funny moments, if you're into that sort of thing...

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  • Drupal, ImageCache module not scaling properly

    - by Patrick
    hi, I've set on imagecache a fixed scale for my images (230 x 150). Upscaling option is unchecked. Successively, I've uploaded new images (original size 230 x 150) but for some reason they are resized: 80 x 52 Instead, if I check the "Allow upscaling" option, the size is correct, but the quality is very bad. So basically, it behaves like if my images are very small, but my original images have the correct size. thanks

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  • MS SQL Server stored procedure meaning

    - by den-javamaniac
    Hi. I'm developing a simple database architecture in VisualParadigm and lately ran over next code excerpt. IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'getType') AND type in (N'P', N'PC')) DROP PROCEDURE getType; Next goes my stored procedure: CREATE PROCEDURE getType @typeId int AS SELECT * FROM type t WHERE t.type_id = @typeId; Can anyone explain what does it mean? P.S.: It would be great, if you may also check for any syntax errors as I'm totally new to MSSQL and stored procedures.

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  • Little (Employee - Shift) SQL Database help

    - by latinunit-net
    Hi Guys, Im creating a little database that has employee, emp_shift, shift, tables now im suppose to be able to calculate at the end of the month which employee has done the most number of shifts. Ive created the SQL creation, insert statements for the tables, and a little diagram to explain what im trying to acomplish, im a beginner and this is a homework ive been trying to do for the last 4 days. Diagram: http://latinunit.net/emp_shift.jpg SQL: latinunit.net/emp_shift.txt can you please guys check it, deadline is 2 days and this is just a part of the whole database

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  • java table question

    - by kate
    hello i have a issue and i want your help i have a table which is called citylink[10][2] and i want to make a check before i move on in my code if it's full to continue if it's not to break!!i know that i should use an if loop but i don't know what to put inside it!!

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  • extract transform load

    - by mitch
    Wikipedia defines a 'typical' ETL cycle as : Cycle initiation Build reference data Extract (from sources) Validate Transform (clean, apply business rules, check for data integrity, create aggregates or disaggregates) Stage (load into staging tables, if used) Audit reports (for example, on compliance with business rules. Also, in case of failure, helps to diagnose/repair) Publish (to target tables) Archive Clean up ..What is meant by 'Build reference data'?

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