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Articles indexed Monday April 19 2010

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  • What is corret way to connect to MySQL?

    - by sky
    what is the correct way to connect to MySQL database without the mysql_fetch_assoc() error? Getting [Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource] with mysql_connect('localhost', 'name', 'pass'); mysql_select_db('dbname'); getting mysql_fetch_assoc() error without mysql_select_db any suggest? CODE are: $result= mysql_query('SELECT DISTINCT username FROM users'); $somethings= array(); while ($row= mysql_fetch_assoc($results)) { $somethings[]= $row['something']; } ? var somethings= ;

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  • Missing Text in Air Application Flex4+Mac OSX Snow Leopard

    - by user294702
    I am running the same AIR application under windows, linux and Mac OSX Windows and Linux look fine, but under mac OS-X the controls are not showing any text. Button, Tooltips, Labels, Check boxes, everything is blank. I just ported that app to Flex 4. Flex 3 versions of the same app on the same OSX machine works. How can I get controls to show text under Max OSX? Is this a font problem?

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  • passive view and display logic

    - by genesys
    Hi! In MVC and MVP and similar patterns there's often the approach of the "passive view" which is as stupid as possible. This should facilitate unit testing and create a clearer separation of view and model. I know that those patterns come in very different flavours and especially the understanding of MVP seems to differ from article to article. Therefore my question is not "how do i implement this pattern correctly". I want to improve view and model separation and go for better testability of the application. Therefore i'd like to go for a passive view. But my question is, where would you put logic that is clearly only view related? like a textviewer should scroll the text when the scrollbar is moved. would you put the logic for this into the Presenter? Let's say the textviewer has some extended functionality. like setting markings on textpassages. The logic for this makes clearly sense to be put into the Presenter. However, if it is mixed with all the 'direct' logic of the view (like scrolling the text) the Presenter could become very big, which is also not really a nice design. So my question is where to put display related logic of a passive view and what functionallity to mix in the Presenter. Thanks!

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  • People not respecting good practices at workplace

    - by VexXtreme
    Hi There are some major issues in my company regarding practices, procedures and methodologies. First of all, we're a small firm and there are only 3-4 developers, one of which is our boss who isn't really a programmer, he just chimes in now and then and tries to do code some simple things. The biggest problems are: Major cowboy coding and lack of methodologies. I've tried explaining to everyone the benefits of TDD and unit testing, but I only got weird looks as if I'm talking nonsense. Even the boss gave me the reaction along the lines of "why do we need that? it's just unnecessary overhead and a waste of time". Nobody uses design patterns. I have to tell people not to write business logic in code behind, I have to remind them not to hardcode concrete implementations and dependencies into classes and cetera. I often feel like a nazi because of this and people think I'm enforcing unnecessary policies and use of design patterns. The biggest problem of all is that people don't even respect common sense security policies. I've noticed that college students who work on tech support use our continuous integration and source control server as a dump to store their music, videos, series they download from torrents and so on. You can imagine the horror when I realized that most of the partition reserved for source control backups was used by entire seasons of TV series and movies. Our development server isn't even connected to an UPS and surge protection. It's just plugged straight into the wall outlet. I asked the boss to buy surge protection, but he said it's unnecessary. All in all, I like working here because the atmosphere is very relaxed, money is good and we're all like a family (so don't advise me to quit), but I simply don't know how to explain to people that they need to stick to some standards and good practices in IT industry and that they can't behave so irresponsibly. Thanks for the advice

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  • Performance impact using culture invariant resources

    - by Praveen S
    I would like to know the performance impact of using the culture invariant resources instead of culture specific ones. For example, we plan to deploy a website and not have any en-US resources. This is because our culture invariant resources are always identical to the en-US resources. Is this a good idea ? What are the cons?

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  • Is there a way to unit test an async method?

    - by Jiho Han
    I am using Xunit and NMock on .NET platform. I am testing a presentation model where a method is asynchronous. The method creates an async task and executes it so the method returns immediately and the state I need to check aren't ready yet. I can set a flag upon finish without modifying the SUT but that would mean I would have to keep checking the flag in a while loop for example, with perhaps timeout. What are my options?

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  • redefine __and__ operator

    - by wiso
    Why I can't redefine the __and__ operator? class Cut(object): def __init__(self, cut): self.cut = cut def __and__(self, other): return Cut("(" + self.cut + ") && (" + other.cut + ")") a = Cut("a>0") b = cut("b>0") c = a and b print c.cut() I want (a>0) && (b>0), but I got b, that the usual behaviour of and

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  • Adaptive Threshold in OpenCV (Version 1 - the swig version)

    - by Neil Benn
    Hello I'm trying to get adaptive thresholding working in the python binding to opencv (the swig one - cannot get opencv 2.0 working as I am using a beagleboard as the cross compiling is not working yet). I have a greyscale image (ccg.jpg) and the following code import opencv from opencv import highgui img = highgui.cvLoadImage("ccg.png") img_bw = opencv.cvCreateImage(opencv.cvGetSize(img), opencv.IPL_DEPTH_8U, 1) opencv.cvAdaptiveThreshold(img, img_bw, 125, opencv.CV_ADAPTIVE_THRESH_MEAN_C, opencv.CV_THRESH_BINARY, 7, 10) When I run this I get the error: RuntimeError: openCV Error: Status=Formats of input arguments do not match function name=cvAdaptiveThreshold error messgae= file_name=cvadapthresh.cpp line=122 I've also tried having both the source and dest arguments both the same (greyscale) and I get the error 'Unsupported format or combination of formats'. Does anyone have any clues as to where I could be going wrong? Cheers, Neil

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  • How to display MySQL Select statement results in PHP

    - by Vafello
    I have the following code and it should return just one value (id) from mysql table. The following code doesnt work. How can I output it without creating arrays and all this stuff, just a simple output of one value. $query = "SELECT id FROM users_entity WHERE username = 'Admin' "; $result = map_query($query); echo $result;

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  • How to optimize an SQL query with many thousands of WHERE clauses

    - by bugaboo
    I have a series of queries against a very mega large database, and I have hundreds-of-thousands of ORs in WHERE clauses. What is the best and easiest way to optimize such SQL queries? I found some articles about creating temporary tables and using joins, but I am unsure. I'm new to serious SQL, and have been cutting and pasting results from one into the next. SELECT doc_id, language, author, title FROM doc_text WHERE language='fr' OR language='es' SELECT doc_id, ref_id FROM doc_ref WHERE doc_id=1234567 OR doc_id=1234570 OR doc_id=1234572 OR doc_id=1234596 OR OR OR ... SELECT ref_id, location_id FROM ref_master WHERE ref_id=098765 OR ref_id=987654 OR ref_id=876543 OR OR OR ... SELECT location_id, location_display_name FROM location SELECT doc_id, index_code, FROM doc_index WHERE doc_id=1234567 OR doc_id=1234570 OR doc_id=1234572 OR doc_id=1234596 OR OR OR x100,000 These unoptimized query can take over 24 hours each. Cheers.

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  • Java: is Exception class thread-safe?

    - by Vilius Normantas
    As I understand, Java's Exception class is certainly not immutable (methods like initCause and setStackTrace give some clues about that). So is it at least thread-safe? Suppose one of my classes has a field like this: private final Exception myException; Can I safely expose this field to multiple threads? I'm not willing to discuss concrete cases where and why this situation could occur. My question is more about the principle: can I tell that a class which exposes field of Exception type is thread-safe? Another example: class CustomException extends Exception { ... } Is this class thread-safe?

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  • WPF reference style in resource dictionary and use triggers

    - by Taylor
    I have a style defined in a resource dictionary that applies to all ComboBox controls. Within the ComboBox control, I reference the style like so: Style="{DynamicResource MyComboBoxStyle}" This works ok. I want to be able to add some triggers to some of the ComboBox controls. What is a good way to use the style referenced as a dynamic resource yet still be able to add triggers to some of the ComboBox controls?

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  • Understanding Off Page Optimisation

    Many website owners who are doing their own SEO may have amazing content that is really well optimised, all the keywords in the right locations and the right amount and all live links but still have poor search engine rankings. What they sometimes miss off is "off the page optimisations".

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  • What is SEO and Why Do I Need It?

    SEO is the acronym for Search Engine Optimization. What this means, in a nutshell, is the process of improving the likelihood that your website will be one of the first results displayed by a search engine, based on the keywords used to generate the search.

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  • asp.net external form loading into jquery dialog submit button issue

    - by Mark
    I am loading an external file 'contact_us.aspx' into a jquery dialog box. the external page contains a form. When the submit button is pressed it closes the dialog box and changes the page to contact_us.aspx. is my code correct or is there a different way of doing this. see my code below, thanks. This JS is in y masterpage: <script type="text/javascript"> $(document).ready(function() { var dialogOpts = { modal: true, bgiframe: true, autoOpen: false, height: 500, width: 500, open: function(type, data) { $(this).parent().appendTo(jQuery("form:first")); } } $("#genericContact").dialog(dialogOpts); //end dialog $('a.conactGeneric').click( function() { $("#genericContact").load("contact_us.aspx", [], function() { $("#genericContact").dialog("open"); } ); return false; } ); }); </script> The external file 'contact_us.aspx' which is loaded into the dialog box, when the link is clicked. <asp:Panel ID="pnlEnquiry" runat="server" DefaultButton="btn_Contact"> <asp:Label ID="lblError" CssClass="error" runat="server" Visible="false" Text=""></asp:Label> <div class="contact_element"> <label for="txtName">Your Name <span>*</span></label> <asp:TextBox CssClass="contact_field" ID="txtName" runat="server"></asp:TextBox> <asp:RequiredFieldValidator CssClass="contact_error" ControlToValidate="txtName" Display="Dynamic" ValidationGroup="valContact" ID="RequiredFieldValidator1" runat="server" ErrorMessage="Enter your name"></asp:RequiredFieldValidator> </div> <div class="contact_element"> <label for="txtName">Phone Number</label> <asp:TextBox CssClass="contact_field" ID="txtTel" runat="server"></asp:TextBox> <asp:RequiredFieldValidator CssClass="contact_error" ControlToValidate="txtTel" Display="Dynamic" ValidationGroup="valContact" ID="RequiredFieldValidator2" runat="server" ErrorMessage="Enter your phone number"></asp:RequiredFieldValidator> </div> <div class="contact_element"> <label for="txtEmail">Your Email <span>*</span></label> <asp:TextBox CssClass="contact_field" ID="txtEmail" runat="server"></asp:TextBox> <asp:RequiredFieldValidator CssClass="contact_error" ControlToValidate="txtEmail" Display="Dynamic" ValidationGroup="valContact" ID="RequiredFieldValidator3" runat="server" ErrorMessage="Enter your email address"></asp:RequiredFieldValidator> </div> <div class="contact_element"> <label for="txtQuestion">Question <span>*</span></label> <asp:TextBox TextMode="MultiLine" CssClass="contact_question" ID="txtQuestion" runat="server"></asp:TextBox> <asp:RequiredFieldValidator CssClass="contact_error" ControlToValidate="txtQuestion" Display="Dynamic" ValidationGroup="valContact" ID="RequiredFieldValidator4" runat="server" ErrorMessage="Enter your question"></asp:RequiredFieldValidator> </div> <div class="contact_chkbox"> <asp:CheckBox ID="chkNews" runat="server" Checked="true" Text="Receive our monthly newsletter" EnableTheming="false" /> </div> <span class="mandatory">* Required Field</span> <asp:LinkButton ID="btn_Contact" ToolTip="Submit" CssClass="submit_btn" ValidationGroup="valContact" runat="server" OnClick="SignUp" ></asp:LinkButton> <asp:RegularExpressionValidator CssClass="contact_error" ID="RegularExpressionValidator1" runat="server" ValidationExpression=".*@.{2,}\..{2,}" Display="Dynamic" ValidationGroup="valContact" ControlToValidate="txtEmail" ErrorMessage="Invalid email format."></asp:RegularExpressionValidator> <asp:ValidationSummary ID="ValidationSummary1" ValidationGroup="valContact" ShowMessageBox=true ShowSummary=false runat="server" /> </asp:Panel> <asp:Panel ID="pnlThanks" runat="server" Visible="false"> <h1>Thank you!</h1> </asp:Panel> code behind file: protected void SignUp(object sender, EventArgs e) { SmtpMail.SmtpServer = "localhost"; MailMessage myMail = new MailMessage(); //String myToEmail = MyDB.getScalar("select setting_value from [Website.Settings]"); ; //myMail.To = myToEmail; myMail.To = "[email protected]"; myMail.From = "[email protected]"; //myMail.Bcc = "[email protected]"; myMail.Subject = "Enquiry from the Naturetrek Site"; StringBuilder myContent = new StringBuilder(); myContent.Append("Name : " + txtName.Text + "\r\n"); myContent.Append("Email: " + txtEmail.Text + "\r\n"); myContent.Append("Telephone: " + txtTel.Text + "\r\n"); myContent.Append("\r\nTheir Question: \r\n" + txtQuestion.Text + "\r\n"); if (chkNews.Checked != true) { myContent.Append("Subscribed to newsletter: No"); } else { myContent.Append("Subscribed to newsletter: Yes"); } myContent.Append("\r\n"); myMail.Body = myContent.ToString(); SmtpMail.Send(myMail); pnlEnquiry.Visible = false; pnlThanks.Visible = true; }

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  • Trying to Nullify Django model fields with method where model and fields are parameters

    - by Johnny4000
    I'm trying to write a method like the below where a list of fields (a subset of all the fields) is passed in as a parameter and has their column values set to null. I would be happy of I could get a method with just the fields as a parameter like below, but having the model as a parameter would be even better. from my_project.my_app.models import MyModel def nullify_columns (self, null_fields): field_names = MyModel._meta.get_all_field_names() for field in field_names: if field in null_fields: # The below line does not work because I'm not sure how to # dynamically assign the field name. MyModel.objects.all().update( (MyModel.get_field(field).column) = None) Right now I have something like if 'column1' in list_of_fields: MyModel.objects.all().update(column1 = None) if 'column2' in list_of_fields: MyModel.objects.all().update(column2 = None) etc. which is horrible, but works.

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  • Trouble refreshing UITableView

    - by aahrens
    I'm trying to develop a basic GPA Calculator. I have an AllCourses class that holds Course objects. I have an AllCourses object in my CalcAppDelegate. In my ThirdViewController I can successfully update the number of Courses in my AllCourses object. However, the problem I'm having is that when I switch to the RootViewController the UITable isn't being repopulated with the updated Courses that were added. I tried [self reloadData] in the viewWillAppear in my RootViewController but it caused my app to close. I didn't use IB to create the views so I think it could be the case that I don't have things hooked up correctly. I did it programatically. Does anyone see anything I'm missing in my code? Here is the link to my project http://files.me.com/aahrens/q0odzi

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