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  • Newbie database index question

    - by RenderIn
    I have a table with multiple indexes, several of which duplicate the same columns: Index 1 columns: X, B, C, D Index 2 columns: Y, B, C, D Index 3 columns: Z, B, C, D I'm not very knowledgeable on indexing in practice, so I'm wondering if somebody can explain why X, Y and Z were paired with these same columns. B is an effective date. C is a semi-unique key ID for this table for a specific effective date B. D is a sequence that identifies the priority of this record for the identifier C. Why not just create 6 indexes, one for each X, Y, Z, B, C, D? I want to add an index to another column T, but in some contexts I'll only be querying on T alone while in others I will also be specifying the B, C and D columns... so should I create just one index like above or should I create one for T and one for (T, B, C, D)? I've not had as much luck as expected when googling for comprehensive coverage of indexing. Any resources where I can get a through explanation and lots of examples of B-tree indexing?

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  • [Newbie] How to join mysql tables

    - by Ivan
    I've an old table like this: user> id | name | address | comments And now I've to create an "alias" table to allow some users to have an alias name for some reasons. I've created a new table 'user_alias' like this: user_alias> name | user But now I have a problem due my poor SQL level... How to join both tables to generate something like this: 1 | my_name | my_address | my_comments 1 | my_alias | my_address | my_comments 2 | other_name | other_address | other_comments I mean, I want to make a "SELECT..." query that returns in the same format as the "user" table ALL users and ALL alias.. Something like this: SELECT user.* FROM user LEFT JOIN user_alias ON `user`=`id` but it doesn't work for me..

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  • Newbie question about controllers in ASP.Net MVC.

    - by Sergio Tapia
    I'm following a tutorial on creating the NerdDinner using ASP.Net MVC. However, I'm using Visual Studio 2010 Ultimate edition and there was only MVC2 to choose from. So I've following the tutorial so far, and everything is really clicking and being really well explained, until this little hitch. The guide is asking me to create new methods on a Controller file like so: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; namespace NerdDinner.Controllers { public class DinnersController : Controller { public void Index(){ Response.Write("<h1>Coming Soon: Dinners</h1>"); } public void Details(int id) { Response.Write("<h1>Details DinnerID: " + id + "</h1>"); } } } However, when I created the Controllers file, Visual Studio created an Index method already, but it looks vastly different to what the tutorial shows. Maybe this is the new way to do things using MVC2? using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; namespace NerdDinner.Controllers { public class DinnersController : Controller { // // GET: /Dinners/ public ActionResult Index() { return View(); } } } My question is, how can I reproduce the Details and Index method (they're in MVC) to the MVC2 way? Is this even relevant? Thank you!

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  • MSBuild Newbie Question

    - by Wallace
    I'm rather new to MS Build and have been reviewing many of the built in target files that ship with Visual Studio. I have seen variables passed a few different ways and am not quite sure of the differences... $(...) @(...) %(...) Thanks in advance.

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  • Javascript Array Scope - newbie here

    - by Gianluca
    So, I am learning Javascript while playing white Google Calendar APIs and I just can't figure how this piece of code is working this way: var entriesResult = []; var data = new Date(2010,3,22,17,0,0); var callback = function(result) { var entries = result.feed.getEntries(); if (entries.length != 0) { entriesResult = eventsManager(entries, 0, data); window.alert("inner entriesResult " + entriesResult.length); } } this.service.getEventsFeed(this.query, callback, handleGDError); window.alert("outer entriesResult " + entriesResult.length); eventsManager() is a function that returns an array of Objects. getEventsFeed() it's an API function: it queries the service and pass a "feed root" (a feed with selected items) to the callback function. Why the first alert (inner..) outputs a valid entriesResult.length while the second one (outer..) always outputs a 0? I tought javascript arrays are always passed by reference, what's wrong whit my code? Thank you :)

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  • Prolog newbie question: Making a procedure to print Hello World

    - by dmindreader
    I want to load this simple something into my Editor: Write:-repeat,write("hi"),nl,fail. So that it prints "hi". What should I do? I'm currently trying to do File->New and Saving a file named Write into E:\Program Files\pl\xpce\prolog\lib When doing the query: ?-Write. It's printing: 1 ?- Write. % ... 1,000,000 ............ 10,000,000 years later % % >> 42 << (last release gives the question) Why?

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  • jQuery selecrors. help for newbie

    - by Shamanu4
    Hello. I have this code, which open new jquery-ui dialog and then hide the dialog's titlebar. <div id="keyboard" class="keyboard dialogs">...</div>   $("#keyboard").dialog({ width: 1136, height: 437, position: ['center',400], closeOnEscape: false, autoOpen: false, resizable: false, open: function(event, ui) { $(".ui-dialog-titlebar").hide(); // <-- this selector i want to change } }); But $(".ui-dialog-titlebar") select all titlebars. How do i have change selector to hide only this titlebar?

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  • newbie question: how to show a drop down menu with this function

    - by Mellon
    My model object (e.g. MyObject) has one property (e.g. color), the "color" property holds a string value which comes from a list of string (e.g. colors=['red','yellow', 'black']). now, I have one instance of myObject get from database and show on the view page in a row, I need to show the 'color' property of myObject in a drop down menu with the current value as the default selected. How to implement this in Rails 3 in my view page. (Later, when user select from the dropdown menu, the object will be updated in DB based on user's selection) Please explain with instance "myObject" and list "colors=[...]"

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  • Attach data to Richtext using flex, mysql and php(newbie)

    - by dmschenk
    I'm trying to attach data to a richtext field in Flashbuilder. The data is an html string in a mysql database and I'm connecting using php. The php script is just converting to XML. The connection works because I can easily dump the data to a datagrid and I can see the string. when I try to hook the data to a Richtext field I get "object CallResponder" so I am connected, but I'm not sure how to break it down so that it is just an html string for the text field. Thanks protected function creationCompleteHandler(event:FlexEvent):void { getAllAbout_fxResult.token = aboutfxService.getAllAbout_fx(); } <s:RichText x="10" y="10" text="{getAllAbout_fxResult}" creationComplete="creationCompleteHandler(event)" width="300" height="300"/>

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  • Syntax error when using "with open" in Python (python newbie)

    - by Tony
    [root@234571-app2 git]# ./test.py File "./test.py", line 4 with open("/home/git/post-receive-email.log",'a') as log_file: ^ SyntaxError: invalid syntax The code looks like this: [root@234571-app2 git]# more test.py #!/usr/bin/python from __future__ import with_statement with open("/home/git/post-receive-email.log",'a') as log_file: log_file.write("hello world") and I am using Python 2.5.5 [root@234571-app2 git]# python -V Python 2.5.5

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  • Newbie: UINavigationController is pulling me back from further learning :(

    - by nithin
    I have created a window-based application and my problem is I am unable to create UINavigationController on the go. InFact I don't know how to do that. My AppDelegeate - (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after application launch [window addSubview:logInView.view]; [window makeKeyAndVisible]; } here the logInView is an object of @interface LogInViewController : UIViewController { IBOutlet UITextField *usernameField; IBOutlet UITextField *passwordField; IBOutlet UIButton *logInButton; } -(IBAction) logInClick:(id) sender; from the click action of this loginviewcontroller It should be showing the home screen with navigation controller. and I have to add many subviews. My question is where should I init the UINavigationController and where could I write the codes for adding subviews? how to map it with interfacebuilder?

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  • Problem Displaying XML in Grid View-newbie

    - by Dean
    I am trying to do something in VisualWebDev 2008 Express that I thought would be simple, but it is not working. I want to display data from an XML file so I added the XMLDataSource to my page, pointed it to the XML file, and then added the GridView and connected it to the datasource. I am getting the following error: GridView - GridView1There was an error rendering the control. The data source for GridView with id 'GridView1' did not have any properties or attributes from which to generate columns. Ensure that your data source has content. Could someone please tell me what I might be doing wrong, TIA Dean A smippet from my XML is as follows: 6019 - Renaissance MS - New School Renaissance MS 7155 Hall Road Fairburn, GA 30213 NS-6019200-LA-01 New School Close-out NS-6019200 0.000000000000000e+000 The construction of the new Renaissance MS will be at the intersection of Jones/Hall Road, in the districts 7th & 9F and Land Lots 117, 143 & 146 of Fulton County, GA. The work includes the construction of the 180,500 square foot building that will house 34 standard classrooms, 12 standard science labs, 20 special purpose classrooms, cafeteria and litchen, gymnasium, media center and administrative offices. The site will also have multi-purpose playfields with track, softball field, tennis courts and basketball/volleyball court. Terry O'Brien Parsons Stevens Wilkinson Stang Newdow Barton Malow -84.62242 33.61497

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  • how to run this qt script? (newbie question)

    - by GB_J
    I have a qt script(barchart.qs) that creates a graph for me. I don't know how i can incorporate(ie show the graph) in my qt mainwindow. Can some one please help me look at the code and what its outputs are? I tried engine.evaluate, but i do not know what is the QScriptValue i'm getting in return. Thanks sooo much. This is the script: BarChart.prototype = new QWidget; BarChart.prototype.suffix = ""; function BarChart(parent) { QWidget.call(this, parent); } // find the maximum value and widest (pixel-wise) label and suffix BarChart.prototype.showEvent = function(event) { var fm = new QFontMetrics(this); this.margin = 20; this.titleHeight = fm.height(); this.barHeight = 1.5 * fm.height(); this.barSpacing = 0.6 * fm.height(); this.maxValue = this.suffixWidth = this.labelWidth = 0; var count = 0; for (d in this.data) { this.labelWidth = Math.max(this.labelWidth, fm.width(d)); this.maxValue = Math.max(this.maxValue, this.data[d]); this.suffixWidth = Math.max(this.suffixWidth, fm.width(String(this.data[d]) + " " + this.suffix)); count++; } this.startHue = 15; this.hueDelta = 360 / count; this.size = new QSize(640, this.titleHeight + 2 * this.margin + (this.barHeight + this.barSpacing) * count); } BarChart.prototype.paintEvent = function(event) { var p = new QPainter; p.begin(this); // background and title p.fillRect(this.rect, new QBrush(new QColor(255, 255, 255))); p.drawText(0, 0, this.width, this.margin + this.titleHeight, Qt.AlignCenter, this.windowTitle, 0); var ofs = this.labelWidth + this.margin; var ww = this.width - this.suffixWidth - ofs - 2 * this.margin; var hue = this.startHue; var y = 0; p.translate(this.margin, this.titleHeight + 1.5 * this.margin); for (d in this.data) { // label on the left side p.setPen(new QColor(Qt.black)); p.drawText(0, y, this.labelWidth, this.barHeight, Qt.AlignVCenter + Qt.AlignRight, d, 0); // the colored bar var gradient = new QLinearGradient(new QPoint(ofs, y), new QPoint(ofs, y + this.barHeight)); gradient.setColorAt(0, QColor.fromHsv(hue, 255, 240)); gradient.setColorAt(1, QColor.fromHsv(hue, 255, 92)); p.setBrush(new QBrush(gradient)); p.setPen(new QColor(96, 96, 96)); var bw = this.data[d] * ww / this.maxValue; p.drawRect(ofs, y, bw, this.barHeight); // extra text at the end of the bar var text = new String(this.data[d] + " " + this.suffix); p.setPen(new QColor(Qt.black)); p.drawText(ofs + bw + this.margin/2, y, this.suffixWidth, this.barHeight, Qt.AlignVCenter + Qt.AlignLeft, text, 0); // for the next bar y += (this.barHeight + this.barSpacing); hue += this.hueDelta; if (hue >= 360) hue -= 360; } p.end(); } BarChart.prototype.wheelEvent = function(event) { this.startHue += event.delta() / 8 / 5; if (this.startHue = 360) this.startHue -= 360; if (this.startHue < 0) this.startHue += 360; this.update(); event.ignore(); } BarChart.prototype.mousePressEvent = function(event) { var fname = QFileDialog.getSaveFileName(this, "Save", ".", "*.png", 0, 0); if (fname.length > 0) { var img = new QImage(this.size, QImage.Format_ARGB32_Premultiplied); this.render(img); img.save(new QFile(fname)); } } var chart = new BarChart; chart.windowTitle = "Monthly"; chart.suffix = "reports"; chart.data = { "September" : 45, "October" : 60, "November" : 56, "December" : 0 }; chart.show(); QCoreApplication.exec();

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  • newbie trying to write url rewite in .htaccess file

    - by user297975
    My site was under example.com/waha/ Now I move the site right under the root example.com I want to 301 redirect all the old links like example.com/waha/notice/5803 to example.com/notice/5803 How can I do it? My current .htaccess file is below. <IfModule mod_rewrite.c> RewriteEngine On # NOTE: change this to your actual StatusNet path; may be "/". RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule (.*) index.php?p=$1 [QSA,L] </IfModule> <FilesMatch "\.(ini)"> Order allow,deny </FilesMatch> Options -Indexes

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  • Newbie queston: Cannot load http://localhost/phptest:8080/

    - by Princess Innah
    Hi guys, I decided to learn HTML so I installed apache on windows vista. Everything seems to work fine; when I go to http://localhost:8080 the sample webpage installed by apache shows. Apache is configured at port 8080. So far so good. Since my DocumentRoot is c:\pub, I made another folder inside, e.g., c:\pub\test. What I'm trying to figure out is why the page at http://localhost/test:8080 cannot load? It has index.html and apache is working fine. Any ideas?

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  • New iPhone Dev policy

    - by milesmeow
    Apple doesn't want anyone to create iPhone apps outside of the Xcode/Objective-C environment. How can they actually reinforce this? If the other IDE's, for example Unity, compiles to an iPhone executable, how will Apple know which dev environment you used to create the app? Can they have Xcode compile some sort of signature into the executable that no one knows about?

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  • Kohana newbie - sample CRUD application

    - by titel
    I'm completely new to this framework and I'm trying to find some sample CRUD application to get started with Kohana 3. There is a tutorial and information in the unofficial Kohana 3 Wiki (http://kerkness.ca/wiki/doku.php), but event there, there are some aspects that are not covered (the model, validation, etc).

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  • Dashcode newbie question: Change a button's label programmatically

    - by Koning Baard XIV
    Hi all! I'm new to Mac OS X Dashboard developement. Now, I have a button with id b_start. When that button is clicked, I want the label of the button to change to "Round". Now I have tried these, but none of them work: document.getElementById("b_start").label = "Round"; document.getElementById("b_start").text = "Round"; document.getElementById("b_start").innerText = "Round"; document.getElementById("b_start").object.setValue("Round"); document.getElementById("b_start").value = "Round"; Does anyone how I can change the button's label? Thanks in advance.

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  • SIFR Newbie: font display problem in non-flash browsers

    - by bullquartz
    Hi, I'm wondering if someone can help me with this as I'm fairly new to siFR and think there is something essential i'm not comprehending in the documentation. I'm having success using siFR 3 (r436) to render fonts and it's working just how I want. However if I turn flash off in any browser the original (no longer rendered) html text displays very badly indeed. I thought that in any non-flash browser my inital stylesheet would be referred to and not siFR.css and I would be able to adjust the html text as a seperate entity. I think i probably developed this bad idea because I remember in earlier siFR versions you had to mess around alot with stylings on the original stylesheet + the sifr-config so you would get corresponding line heights/widths etc between the html and rendered font. (i realise that siFR 3 renders the flash in a different way) So it seems that siFR.css controls both the non-flash text and the rendered font. Anyway my essential noob questions is: how do i get the the original html text to have the same dimensions as the rendered font? thanks for you help

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  • SQL syntax Newbie student

    - by sammysmall
    Describe the output of the following SQL query: select custId, name from customer where region = "New York" UNION select cust.custId, cust.name from customer cust where cust.custId IN (select cust_order.custId from customer_order cust_order, company_employee comp_emp where cust_order.salesEmpId = comp_emp.empId AND comp_emp.name = 'DANIEL'); My question is: at line from customer cust is cust referring to a column in the customer table... This is a homework question I have identified the components leading up to this line and I think that cust is a column in the customer table... I am not asking for an overall solution just a bit of encouragement if I am on the right track...

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  • newbie: Rails on remote Apache server not displaying index.html.erb

    - by paracaudex
    I played around with Rails on my laptop (running Linux + Apache + MySQL) and had no trouble getting the Getting Started with Rails tutorial to work locally. Now I'm trying the same thing at work on a remote Mac OS X + Apache server, and things aren't quite so rosy. I typed rails blog -d mysql to create a directory called blog in /Library/WebServer/Documents/mydirectory. The trouble is, if I go to server.com/mydirectory/public, I get the public/index.html in my browser. But, I don't get this file if I go to server.com/mydirectory/. Instead, I get a 403 error. Also, when I: script/generate controller home index to create: app/views/home/index.html.erb I am unable to view this file, whether I go to server.com/mydirectory/home/index, or if I add a new line (map.root :controller => "home") to config/routes.rb and go to server.com/mydirectory. Am I missing something really obvious about Apache and Rails?

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  • Newbie question - MySQL index size

    - by Tommy
    I've just started to investigating how I should optimize my database. Indexing seems to be a good idea, so I want to index a VARCHAR column, the engine is MyISAM. From what I've read, I understand that an index is limited to a size of 1000 bytes. A VARCHAR character is 3 bytes in size. Does this mean that if I want to index a VARCHAR column with 50 rows, I need an index prefix of 6 characters? I came to that number by dividing 1000 with the row number 50, then the bytesize per character that is 3. 1000/50/3=6,66. It seems a little complicated, so I'm just wondering if I'm thinking right? It seems weird to me that you'd only be able to index 333 rows in a VARCHAR column, using a prefix of 1 character.

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