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  • SQL Code Smells

    - by Lijo
    Hi Team, Could you please list some of the bad practices in SQL, that novice people do? I have found the use of "WHILE loop" in scenarios which could be resolved using set operations. Another example is inserting data only if it does not exist. This can be achieved using LEFT OUTER JOIN. Some people go for "IF" Any other thoughts? Thanks Lijo

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  • Is saving to database just to get an ID a bad hack?

    - by Narsil
    I hope the title is not too confusing. I am trying to make folders with linq-to-sql objects' IDs. Actually I have to create folders before I should save them. I will use them to keep user uploaded files. As you can see I have to create the folder with the FileID before I can save it there. So I just save a record which will be edited or maybe deleted File newFile = new File(); ...//add some values to fields so they don't throw rule violations db.AddFile(newFile); db.Save(); System.IO.Directory.CreateDirectory("..Uploads/"+newFile.FileId.ToString()); After that I will have to edit some fields and save again. Of course user might stop upload and I would have to delete it. I know I can write a stored procedure to get the next available FileID but some other upload happening at the same time would get the same number. So they would write in same directory which is a thing I don't want. Should I go on with this, would there be some problems? Can you think of a better way?

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  • Testing a db structure before beginnning to code the app

    - by driverate
    I'm in the beginning stages of writing (and learning as I go) a Python database app using SQLite. I have the db structure planned on paper, and I have the queries I'll need in mind, but before I start coding I want to fully test the db design so I know it's right and ready. What's the best free software to use to test the db structure quickest?

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  • How to convert this jquery code into noconflict

    - by metal-gear-solid
    will we have to replace every $ with jquery? $(document).ready(function() { $('.tabs a').click(function(){ switch_tabs($(this)); }); switch_tabs($('.defaulttab')); }); function switch_tabs(obj) { $('.tab-content').hide(); $('.tabs a').removeClass("selected"); var id = obj.attr("rel"); $('#'+id).show(); obj.addClass("selected"); }

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  • Javascript code for handling Form behaviour.

    - by Andrew
    Hello, Here's how the situation looks : I have a couple simple forms <form action='settings.php' method='post'> <input type='hidden' name='setting' value='value1'> <input type='submit' value='Value1'> </form> Other small forms close to it have value2, value3, ... for the specific setting1, etc. Now, I have all these forms placed on the settings.php subpage, but I'd also like to have copies of one or two of them on the index.php subpage (for ease of access, as they are in certain situations rather frequently used). Thing is I do not want those forms based on the index.php to redirect me in any way to settings.php, just post the hidden value to alter settings and that's all. How can I do this with JS ? Cheers

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  • C puzzle: Output of printf should be '5' always

    - by pragadheesh
    Hi, I found this puzzle in a C aptitude paper. void change() { //write something in this function so that output of printf in main function //should always give 5.you can't change the main function } int main() { int i = 5; change(); i = 10; printf("%d", i); return 0; } Any solutions.?

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  • How to stop htaccess rewrite rule carrying over query string

    - by geoffs3310
    I am setting up some redirects. I want to redirect the following URL: /cms/index.php?cat_id=2 to the following URL: /flash-chromatography The rule I currently have is as follows: RewriteCond %{QUERY_STRING} ^cat_id=2$ [NC] RewriteRule ^cms/index\.php$ /flash-chromatography [L,R=301] This rule is almost perfect apart from it redirect the URL to the following: /flash-chromatography?cat_id=2 So you see my problem is it has kept the ?cat_id=2 part when I don't want it to. How do I stop it keeping this bit?

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  • Get Object ID of UI element from code.

    - by andoriyu.mp
    I'm trying link 40 buttons to one event handler method and then do the processing work from one method instead of 40. I know how to link it but once I get there I don't know how to distinguish what button was pressed. Does anyone know how to reference the button object sender id or is there another way to solve this problem? Any help would be greatly appreciated.

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  • Function call within XAML code?

    - by Matt H.
    I'd like to set a style on all my TextBox controls that does the following when it receives keyboard focus: 1) Change the background color 2) Call .SelectAll() to highlight all text I have this so far: <Style TargetType="TextBox"> <Style.Triggers> <Trigger Property="IsKeyboardFocusWithin" Value="True"> <Setter Property="Background"> <Setter.Value> <SolidColorBrush Color="#FFFFD1D9"/> </Setter.Value> </Setter> </Trigger> </Style.Triggers> </Style> Is there a way to also call .SelectAll() ? Thanks.

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  • Use continue or Checked Exceptions when checking and processing objects

    - by Johan Pelgrim
    I'm processing, let's say a list of "Document" objects. Before I record the processing of the document successful I first want to check a couple of things. Let's say, the file referring to the document should be present and something in the document should be present. Just two simple checks for the example but think about 8 more checks before I have successfully processed my document. What would have your preference? for (Document document : List<Document> documents) { if (!fileIsPresent(document)) { doSomethingWithThisResult("File is not present"); continue; } if (!isSomethingInTheDocumentPresent(document)) { doSomethingWithThisResult("Something is not in the document"); continue; } doSomethingWithTheSucces(); } Or for (Document document : List<Document> documents) { try { fileIsPresent(document); isSomethingInTheDocumentPresent(document); doSomethingWithTheSucces(); } catch (ProcessingException e) { doSomethingWithTheExceptionalCase(e.getMessage()); } } public boolean fileIsPresent(Document document) throws ProcessingException { ... throw new ProcessingException("File is not present"); } public boolean isSomethingInTheDocumentPresent(Document document) throws ProcessingException { ... throw new ProcessingException("Something is not in the document"); } What is more readable. What is best? Is there even a better approach of doing this (maybe using a design pattern of some sort)? As far as readability goes my preference currently is the Exception variant... What is yours?

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  • Mistake in the Code

    - by vibha
    myTree.on('click',function(node){ if(node.isLeaf()) { Ext.Msg.alert("You are in value ",nodeValue,"whose name is",nodeName); alert("You are in value ",nodeValue,"whose name is",nodeName); } }); myTree is a TreePanel. I'm getting a tree but click function is not working. I'm very new to extjs. Help me out. Thanks in advance

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  • iPhone - Developing on multiple Macs

    - by hecta
    I have a mac and a macbook, and one iPhone device and want to develop on both systems. My enrollment type is individual. How am I able to install the developer certificate and provisioning profiles on both machines? On the macbook it says 'a valid signing identity matching this profile could not be found in your keychain'. In my keychain I have a 'green status' for my developer certificate and in the xcode organizer for my device as well.

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  • where to store helper functions?

    - by ajsie
    i've got a lot of functions i create or copy from the web. i wonder if i should store them in a file that i just include into the script or should i store each function as a static method in a class. eg. i've got a getCurrentFolder() and a isFilePhp() function. should they be stored in a file as they are or each in a class: Folder::getCurrent() File::isPhp(); how do you do? i know this is kinda a "as u want" question but it would be great with some advices/best practices thanks.

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  • Question regarding ip checksum code

    - by looktt
    unsigned short /* this function generates header checksums */ csum (unsigned short *buf, int nwords) { unsigned long sum; for (sum = 0; nwords > 0; nwords--) // add words(16bits) together sum += *buf++; sum = (sum >> 16) + (sum & 0xffff); //add carry over sum += (sum >> 16); //what does this step do??? add possible left-over //byte? But isn't it already added in the loop (if //any)? return ((unsigned short) ~sum); } I assume nwords in the number of 16bits word, not 8bits byte (if there are odd byte, nword is rounded to next large), is it correct? The line sum = (sum 16) + (sum & 0xffff) is to add carry over to make 16bit complement sum += (sum 16); What's the purpose of this step? Add left-over byte? How? Thanks!

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  • How to add a Page to Frame using code in WPF

    - by Robert Höglund
    I have a Window where I have put a Frame. I would like to add a Page to the Frame when I click a button that is also on the Window but not in the Frame. There are several buttons in the Window and each click on a button should load a different Page in the Frame. Since I'm a total newbie on this WPF stuff it's quite possible that this approach is not the best and I have thought about replacing the Frame with a Canvas and then make UserControls instead of Pages that will be added to the Canvas. I welcome any ideas and suggestions on how to best solve this. I aiming for a functionality that is similar to the application Billy Hollis demonstrated in dnrtv episode 115. (http://dnrtv.com/default.aspx?showID=115).

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  • js works inside the page but not in code behind

    - by Cristian Boariu
    Hi guys, I have this function put in a MasterPage, which shows up an mp3 player: <script type="text/javascript"> $(document).ready(function() { var stageW = 500; var stageH = 216; var cacheBuster = Date.parse(new Date()); var flashvars = {}; var params = {}; params.bgcolor = '#F6F6F6'; params.allowfullscreen = 'true'; flashvars.stageW = stageW; flashvars.stageH = stageH; flashvars.pathToFiles = ''; flashvars.settingsPath = '../mp3player/mp3player_settings.xml'; flashvars.xmlPath = '<%# getRestXmlPlayerUrl() %>'; flashvars.keepSelected = 't'; flashvars.selectedWindow = '4'; flashvars.slideshow = 't'; flashvars.imageWidth = '130'; flashvars.imageHeight = '130'; swfobject.embedSWF('swf/preview.swf?t=' + cacheBuster, 'myContent', stageW, stageH, '9.0.124', 'swf/expressInstall.swf', flashvars, params); }); </script> All works great. But, because i have some ajax on the page with update panel, the flash in not rendered when ajax requests occurs so i need to register this function and i've tried something like this: protected void Page_PreRender(object sender, EventArgs e) { Type cstype = this.GetType(); String csnameForPlayer = "applyStyleToMp3Player"; if (!Page.ClientScript.IsClientScriptBlockRegistered(cstype, csnameForPlayer)) { StringBuilder cstextForPlayer = new StringBuilder(); cstextForPlayer.Append(" $(document).ready(function() { " + " var stageW = 500;" + " var stageH = 216;" + " var cacheBuster = Date.parse(new Date());" + " var flashvars = {};" + " var params = {};" + " params.bgcolor = '#F6F6F6';" + " params.allowfullscreen = 'true';" + " flashvars.stageW = stageW;" + " flashvars.stageH = stageH;" + " flashvars.pathToFiles = '';" + " flashvars.settingsPath = '../mp3player/mp3player_settings.xml';" + " flashvars.xmlPath = '<%# getRestXmlPlayerUrl() %>';" + " flashvars.keepSelected = 't';" + " flashvars.selectedWindow = '4';" + " flashvars.slideshow = 't';" + " flashvars.imageWidth = '130';" + " flashvars.imageHeight = '130';" + " swfobject.embedSWF('swf/preview.swf?t=' + cacheBuster, 'myContent', stageW, stageH, '9.0.124', 'swf/expressInstall.swf', flashvars, params);" + "}); "); ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), csnameForPlayer, cstextForPlayer.ToString(), true); } } Well, this does not work. The flash player does not appear any more, so, i assume that is something wrong in the cstextForPlayer. I've spent over one hour to figure it out but i've failed. Does anyone see the problem? Thanks in advance.

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  • PHP RegEx: How to Stripe Whitespace Between Two Strings

    - by roydukkey
    I have been trying to write a regex that will remove whitespace following a semicolon (';') when it is between both an open and close curly brace ('{','}'). I've gotten somewhere but haven't been able to pull it off. Here what I've got: <?php $output = '@import url("/home/style/nav.css"); body{color:#777; background:#222 url("/home/style/nav.css") top center no-repeat; line-height:23px; font-family:Arial,Times,serif; font-size:13px}' $output = preg_replace("#({.*;) \s* (.*[^;]})#x", "$1$2", $output); ?> The the $output should be as follows. Also, notice that the first semicolon in the string still is followed by whitespace, as it should be. <?php $output = '@import url("/home/style/nav.css"); body{color:#777;background:#222 url("/home/style/nav.css") top center no-repeat;line-height:23px;font-family:Arial,Times,serif;font-size:13px}'; ?> Thanks! In advance to anyone willing to give it a shot.

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