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• Need opinions on LaTeX and ever upgrading

  - by yCalleecharan

  Hi, I've been using LaTeX since 2005 with the TeXLive distribution and I've been upgrading as each new TeXLive distribution comes out. In the recent years I noticed an increase in new packages, updated packages and in one instance a new package bearing a different name replacing an old one by the same package author. A LaTeX document which relies heavily on packages and which has been produced a few years back may start to get some warnings and error messages on present-day LaTeX compilation. The primary reason I switched to LaTeX is because of its reliability and robustness to create big documents easily, not to mention the adorable typographic quality. With LaTeX one doesn't have to worry about how to open a docx in an old program supporting only doc for instance. Now, when there are so much continual changes in the packages in a LaTeX distribution, I tend to wonder when will this madness end. Not that having enhanced and new features are bad in packages, but not all updated packages are backward compatible. Eventually one would like to be able to compile a LaTeX file in 10 years time that he/she is working on at present and not get any compilation warnings/error messages due to some unpredictable behavior of updated packages or due to a package that has been cast-off from a LaTeX distribution. If I understand correctly CTAN do keep a database with all packages from different versions. I would like to know how you LaTeX users handle this issue. Thanks a lot...

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• jQuery Validation help

  - by Cameron

  If you look here: http://creathive.net you will see I have an application form down at the bottom of the page and I have added some jQuery validation to make a user fills it out correctly. However what I would like to do is instead of showing all those labels next to the input boxes (which breaks the layout) is just keep it simple and only change the colours of the input fields. How do I do this? Thanks.

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• Where to store global variables like file paths in java ?

  - by Jules Olléon

  In my application I use some icons. Where should I store the path of the directory containing those icons ? The icons are used in different classes so it doesn't really make sense to store them in one of those classes in particular. I read that global variables are evil, but is it acceptable to use a class (eg Commons) containing only public static final fields to store this king of data ? What solution is used in professional applications ?

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• using yield in C# like I would in Ruby

  - by Sarah Vessels

  Besides just using yield for iterators in Ruby, I also use it to pass control briefly back to the caller before resuming control in the called method. What I want to do in C# is similar. In a test class, I want to get a connection instance, create another variable instance that uses that connection, then pass the variable to the calling method so it can be fiddled with. I then want control to return to the called method so that the connection can be disposed. I guess I'm wanting a block/closure like in Ruby. Here's the general idea: private static MyThing getThing() { using (var connection = new Connection()) { yield return new MyThing(connection); } } [TestMethod] public void MyTest1() { // call getThing(), use yielded MyThing, control returns to getThing() // for disposal } [TestMethod] public void MyTest2() { // call getThing(), use yielded MyThing, control returns to getThing() // for disposal } ... This doesn't work in C#; ReSharper tells me that the body of getThing cannot be an iterator block because MyThing is not an iterator interface type. That's definitely true, but I don't want to iterate through some list. I'm guessing I shouldn't use yield if I'm not working with iterators. Any idea how I can achieve this block/closure thing in C# so I don't have to wrap my code in MyTest1, MyTest2, ... with the code in getThing()'s body?

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• C# MultiThread Safe Class Design

  - by Robert

  I'm trying to designing a class and I'm having issues with accessing some of the nested fields and I have some concerns with how multithread safe the whole design is. I would like to know if anyone has a better idea of how this should be designed or if any changes that should be made? using System; using System.Collections; namespace SystemClass { public class Program { static void Main(string[] args) { System system = new System(); //Seems like an awkward way to access all the members dynamic deviceInstance = (((DeviceType)((DeviceGroup)system.deviceGroups[0]).deviceTypes[0]).deviceInstances[0]); Boolean checkLocked = deviceInstance.locked; //Seems like this method for accessing fields might have problems with multithreading foreach (DeviceGroup dg in system.deviceGroups) { foreach (DeviceType dt in dg.deviceTypes) { foreach (dynamic di in dt.deviceInstances) { checkLocked = di.locked; } } } } } public class System { public ArrayList deviceGroups = new ArrayList(); public System() { //API called to get names of all the DeviceGroups deviceGroups.Add(new DeviceGroup("Motherboard")); } } public class DeviceGroup { public ArrayList deviceTypes = new ArrayList(); public DeviceGroup() {} public DeviceGroup(string deviceGroupName) { //API called to get names of all the Devicetypes deviceTypes.Add(new DeviceType("Keyboard")); deviceTypes.Add(new DeviceType("Mouse")); } } public class DeviceType { public ArrayList deviceInstances = new ArrayList(); public bool deviceConnected; public DeviceType() {} public DeviceType(string DeviceType) { //API called to get hardwareIDs of all the device instances deviceInstances.Add(new Mouse("0001")); deviceInstances.Add(new Keyboard("0003")); deviceInstances.Add(new Keyboard("0004")); //Start thread CheckConnection that updates deviceConnected periodically } public void CheckConnection() { //API call to check connection and returns true this.deviceConnected = true; } } public class Keyboard { public string hardwareAddress; public bool keypress; public bool deviceConnected; public Keyboard() {} public Keyboard(string hardwareAddress) { this.hardwareAddress = hardwareAddress; //Start thread to update deviceConnected periodically } public void CheckKeyPress() { //if API returns true this.keypress = true; } } public class Mouse { public string hardwareAddress; public bool click; public Mouse() {} public Mouse(string hardwareAddress) { this.hardwareAddress = hardwareAddress; } public void CheckClick() { //if API returns true this.click = true; } } }

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• remove specific field after clicking back in browser or using history.go(-1)

  - by Y.G.J

  i have a form with a capacha, if the capacha was entered wrong, after submit the page is doing a "history.go(-1)" and all fields include the capacha input are back on the screen right now i have a js that clear that - but now that i need it in several places, i want to know if it possible to clear a form field after back with something related to the html form or what ever thanks

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• setting up netbeans for c

  - by leo

  i am really getting annoyed all i want to do is setup a compiler for c in netbeans - i donwloaded and followed the instructions for MiniGW, and now whenever i try to comnpile a programme it says ""Resolve missing native build tools" and the make command and debugger command fields are empty - can anyone help if not can someone tell me a good program i can just download to code in c with in windows thanks

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• Linq2Sql How to write outer join query?

  - by Malcolm

  Hi, I have following SQL tables. ImportantMessages impID Message ImportantMessageUsers imuID imuUserID imuImpID I want to write a Linq2Sql query so that it returns any rows from ImportantMessages that does not have a record in ImportantMessagesUsers. Matchiing fields are impID ----- imuImpID Assume imuUserID of 6

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• C# Extension Method for String Data Type

  - by Jimbo

  My web application deals with strings that need to be converted to numbers alot - users often put commas, currency symbols etc. in these fields so what I want to do is create a string extension method that cleans the field up and converts it to a decimal. For example: decimal myNumber = "$1,250.85".ToDecimal(); Can anyone help with this? Thanks!

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• Magento - get list of items from orders for specific date range

  - by ms80

  Magento database name convention is not trivial. How to get these fields below for last 7 days? Last Name First Name Address City State Zip Phone Email Amount Order # Item #

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• Empty object check

  - by developer

  Is there a way to know if all the properties in an object are empty. My object represents fields from database and I want to know if a particular record is present or not. NULL doesnt seem to work.

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• Storing "derived" values vs calculating them on extraction

  - by kemp

  When you have values which only depends on one or more other fields +/- constants (say retail price & discount price), is it better to store those values too or to calculate them "on the fly" when retrieving the data?

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• UI design for screen which has number of data entry textFields.

  - by shilpa

  Hi all, my app is an e-commerce application. During the checkout process, I have "recipient" and "credit card" screens. In the recipient screen, there are number of fields for address entry, which makes it very clumsy. Same in the case of the credit card screen, where the user is asked to enter their credit card info and billing address. Can anyone suggest how to design these two pages?

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• Calculating correlation coefficient using PostgreSQL?

  - by Dave

  I have worked out how to calculate the correlation coefficient between two fields if both are in the same table: SELECT corr(column1, column2) FROM table WHERE <my filters>; ...but I can't work out how to do it when the columns are from different tables (I need to apply the same filters to both tables). Any hints, please?

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• How do I set the tabbing order of controls in Android?

  - by Pentium10

  You can move between fields with the track ball. As the title says I am looking forward to know how to I set the tabbing order of controls in Android?

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• time interval in c#

  - by NIks

  I am having start time and end time as two fields in my database of type Datetime, Now i want that start time and end time selected by user should not collapse in the interval of start time and end time that are already present in database. How to do this validation.

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• Problem with setting text into a uneditable JTextField

  - by The Z

  I have a tabbed pane with a couple of uneditable JTextFields which I want to fill in with information from a database. However, when I set the text in the text fields to anything, it doesn't show up when I run the program. When I get the text and print it out, it does show. What could be the problem here?

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• What's your favorite cross domain cookie sharing approach?

  - by Haoest

  I see iframe/p3p trick is the most popular one around, but I personally don't like it because javascript + hidden fields + frame really make it look like a hack job. I've also come across a master-slave approach using web service to communicate (http://www.15seconds.com/issue/971108.htm) and it seems better because it's transparent to the user and it's robust against different browsers. Is there any better approaches, and what are the pros and cons of each?

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• Opening txt files in Internet Explorer 8 parses some html

  - by Rob

  I'm not sure if it's just me, but whenever I open .txt files in internet explorer, it always parses the HTML, so forms, buttons, fields all show up. It does this on multiple computers, and I'm fairly sure it hasn't always done this. I know FireFox doesn't, FireFox loads it as a text file. Does anyone else have this problem? If so, have you solved it? If so again, how?

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• saving nested attributes

  - by Victor Martins

  I have a form that has a nested form like this: <%- for subscription in @task.subscriptions -% <%- semantic_fields_for "task[subscription_attributes][]", subscription do |subscription_form|% <%- subscription_form.inputs do -% <%= subscription_form.input :workhours, :label = subscription.user.full_name% <%- end -% <%- end -% <%- end -% And on the task model I have: accepts_nested_attributes_for :subscriptions attr_accessible :mission_id, :statuscode_id, :name, :objectives, :start_at , :end_at, :hours, :testimony ,:subscriptions_attributes In the form (view) I get the correct values on the workhours fields. But when I change the values and hit the submit button, the values are never changed. I can't figure out why...

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• Multiple values in a column

  - by Adnan

  Hi I need some advice regarding multiple records. I have a table with fields username,*message* and message_to. the scenario could be of sending same message to multiple users in a go. What do you suggest? will it be efficient to save all recipients in a single column with comma separated values or I add multiple entries ? Thanks /A

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• cakePHP get self hasMany array

  - by openprojdevel

  I have an table with fields like: empid,empname,empcode,department_id ... I need an array like [Model] -------[department_id 1] --------------[0] --------------------[empid] --------------------[empname] --------------------[empcode] --------------[1] --------------------[empid] --------------------[empname] --------------------[empcode] --------------[2] --------------------[empid] --------------------[empname] --------------------[empcode] -------[department_id 2] --------------[0] --------------------[empid] --------------------[empname] --------------------[empcode] --------------[1] --------------------[empid] --------------------[empname] --------------------[empcode] --------------[2] --------------------[empid] --------------------[empname] --------------------[empcode] -------[department_id 3] --------------[0] --------------------[empid] --------------------[empname] --------------------[empcode] --------------[1] --------------------[empid] --------------------[empname] --------------------[empcode] Regards,

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• tk: how to invoke it just to display something, and return to the main program?

  - by max

  Sorry for the noob question but I really don't understand this. I'm using python / tkinter and I want to display something (say, a canvas with a few shapes on it), and keep it displayed until the program quits. I understand that no widgets would be displayed until I call tkinter.tk.mainloop(). However, if I call tkinter.tk.mainloop(), I won't be able to do anything else until the user closes the main window. I don't need to monitor any user input events, just display some stuff. What's a good way to do this without giving up control to mainloop? EDIT: Is this sample code reasonable: class App(tk.Tk): def __init__(self, sim): self.sim = sim # link to the simulation instance self.loop() def loop(): self.redraw() # update all the GUI to reflect new simulation state sim.next_step() # advance simulation another step self.after(0, self.loop) def redraw(): # get whatever we need from self.sim, and put it on the screen EDIT2 (added after_idle): class App(tk.Tk): def __init__(self, sim): self.sim = sim # link to the simulation instance self.after_idle(self.preloop) def preloop(): self.after(0, self.loop) def loop(): self.redraw() # update all the GUI to reflect new simulation state sim.next_step() # advance simulation another step self.after_idle(self.preloop) def redraw(): # get whatever we need from self.sim, and put it on the screen

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• C#: Need one of my classes to trigger an event in another class to update a text box

  - by Matt

  Total n00b to C# and events although I have been programming for a while. I have a class containing a text box. This class creates an instance of a communication manager class that is receiving frames from the Serial Port. I have this all working fine. Every time a frame is received and its data extracted, I want a method to run in my class with the text box in order to append this frame data to the text box. So, without posting all of my code I have my form class... public partial class Form1 : Form { CommManager comm; public Form1() { InitializeComponent(); comm = new CommManager(); } private void updateTextBox() { //get new values and update textbox } . . . and I have my CommManager class class CommManager { //here we manage the comms, recieve the data and parse the frame } SO... essentially, when I parse that frame, I need the updateTextBox method from the form class to run. I'm guessing this is possible with events but I can't seem to get it to work. I tried adding an event handler in the form class after creating the instance of CommManager as below... comm = new CommManager(); comm.framePopulated += new EventHandler(updateTextBox); ...but I must be doing this wrong as the compiler doesn't like it... Any ideas?!

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• MS Access question

  - by Scott Jackson

  I've an access database table with 3 fields : Purchase date Warranty time Warranty expiry Warranty time has 1, 2, 3, 4, 5 in it which corresponds to years. How can I auto-populate the 'Warranty expiry' field (which is a date field) by looking at the 'Purchase date' and then adding on the 'Warranty time' (warranty time will be 1 = 365 days, 2 = 730 days, etc)?

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