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  • What do I return if the return type of a method is Void? (Not void!)

    - by DR
    Due to the use of Generics in Java I ended up in having to implement a function having Void as return type: public Void doSomething() { //... } and the compiler demands that I return something. For now I'm just returning null, but I'm wondering if that is good coding practice... I've also tried Void.class, void, Void.TYPE, new Void(), no return at all, but all that doesn't work at all. (For more or less obvious reasons) (See this answer for details) So what am I supposed to return if the return type of a function is Void? What's the general use of the Void class? EDIT: Just to spare you the downvotes: I'm asking about V?oid, not v?oid. The class Void, not the reserved keyword void.

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  • asp.net mvc form add comment

    - by Pinu
    I have a page where a product appears on the right side and the user can add comment so i have a user control which gets all the comments and a small text area where user can add new comment for that product. the link of the page is like http://localhost/Product/TestComment/1 Where 1 indicates the id of the product and I have been hard coding my AddNote function below and fourth argument you see has been hard coded, but i need to pass that as the id of the product. How do i do this AddNote(HttpContext.User.Identity.ToString(), txtComment, 1, DateTime.Now, true); [AcceptVerbs(HttpVerbs.Post)] public ActionResult AddComment(string txtComment) { bool rst = _NotesService.AddNote(HttpContext.User.Identity.ToString(), txtComment, 1, DateTime.Now, true); return RedirectToAction("TestComment"); }

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  • Compile C# into objective-C

    - by Ali Shafai
    Now that monotouch is being banned, I was wondering if there is a way to translate C# (or some other modern language for that matter) into objective-C? I won't mind using apple's api as long as I don't have to declare my variables in 3-4 stages (ivar-property-synthesize-dealloc). All I want is a less wordy language to concentrate on my intent and not on the compiler syntax. unfortunately apple in its arrogance thinks objective-c is a "modern" language and if you are looking for an alternative (monotouch) it's because you are incapable of coding. also if you don't find programming in itunes; sorry, xcode enjoyable, it is not because there are better alternatives, it's because you are stupid. anyway back to my original question: can it be done?

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  • setCurrentTab Android

    - by Ali
    i have 4 tabs on my main screen, main ( set to current ) , Call, Email, Web When a user clicks on any of tab call, email or web, it starts making a call, or go to compose a email, or opens up the browser respectfully. Problem is, i want just three tabs (Call, Email, Web) and i Dont want any tab to be selected by default, means they should only become active when a user Touch them..(a call or any service cant be main at all) All java coding, XML file, and Manifest code is given below, XML File (tab_activity_layout) <?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="5dp"> <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" > <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="5dp"></FrameLayout> </RelativeLayout> </LinearLayout> </TabHost> Java Coding (MainTabActivity) package com.NVT.android; import android.app.TabActivity; import android.content.Intent; import android.content.res.Resources; import android.os.Bundle; import android.widget.TabHost; public class MainTabActivity extends TabActivity{ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.tab_activity_layout); Resources res = getResources(); // Resource object to get Drawables TabHost tabHost = getTabHost(); // The activity TabHost TabHost.TabSpec spec; // Resusable TabSpec for each tab Intent intent; // Reusable Intent for each tab // Create an Intent to launch an Activity for the tab (to be reused) intent = new Intent().setClass(this, Main.class); // Initialize a TabSpec for each tab and add it to the TabHost spec = tabHost.newTabSpec("main").setIndicator("Main", res.getDrawable(R.drawable.ic_tab_artists_grey)) .setContent(intent); tabHost.addTab(spec); TabHost host=getTabHost(); host.addTab(host.newTabSpec("one") .setIndicator("Call") .setContent(new Intent(this, CallService.class))); host.addTab(host.newTabSpec("two") .setIndicator("Email") .setContent(new Intent(this, EmailService.class))); host.addTab(host.newTabSpec("three") .setIndicator("Web") .setContent(new Intent(this, WebService.class))); } } Manifest file <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.NVT.android" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Main" android:label="@string/app_name"> <!-- <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> --> </activity> <activity android:name=".MainTabActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Courses"> </activity> <activity android:name=".CampusMap"> </activity> <activity android:name=".GettingHere"> </activity> <activity android:name=".ILoveNescot"> </activity> <activity android:name=".FurtherEducationCourses"> </activity> <activity android:name=".HigherEducationCourses"> </activity> <activity android:name=".EmployersTrainingCourses"> </activity> <activity android:name=".WebService"> </activity> <activity android:name=".CallService"> </activity> <activity android:name=".EmailService"> </activity> </application> <uses-sdk android:minSdkVersion="9" /> <uses-permission android:name="android.permission.CALL_PHONE"></uses-permission> <uses-permission android:name="android.permission.INTERNET" /> </manifest>

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  • Leaving out type="text/javascript" language="javascript"

    - by coffeeaddict
    Most of the script tags I create, I always include type="text/javascript" language="javascript" in the tag. My boss however does not. Sometimes he excludes both, sometimes just has language=javascript even without the quotes Now we have not had an issue in any of the major browsers with his tags. I'm talking about all versions of IE, FF, Safari, and Chrome. Personally I feel it's laziness and just totally improper and bad coding practice to leave stuff out like this even if it works without it. Anyone know if both should be included or just one or is it ok to leave both out in ASP.NET?

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  • Best Method for Minimizable Fullscreen Window

    - by kaykun
    Hi, I'm coding a short game in C++ and Win32, and I want to be able to make it in fullscreen with a fixed size. I also want the user to be able to switch focus between the game window and other windows as much as he/she wants without any weird screen glitches. So far I know of the ChangeDisplaySettings function and creating the window with the WS_POPUP style at initialization to make it fullscreen. To detect the user switching focus to other windows by way of alt+tab or otherwise, what messages should I be handling on the window's WndProc or should I be using another function? When loss of focus is detected should I only call ChangeDisplaySettings(NULL, 0); or are there other functions I should call as well? And what method should I use to handle focus back into the window? Also can anyone give me some info on how to make it work smoothly for different screen sizes? Thanks for any help.

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  • Limit a program's execution time in C (Monte Carlo technique)

    - by rrs90
    I am working on a project which has no determined algorithm to solve using C language. I am Using Monte Carlo technique for solving that problem. And the number of random guesses I want to limit to the execution time specified by the user. This means I want to make full use of the execution time limit defined by the user (as a command line argument) to make as many random iterations as possible. Can I check the execution time elapsed so far for a loop condition. Eg: for(trials=0;execution_time P.S. I am using code blocks 10.05 for coding and GNU compiler.

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  • TRY/CATCH_ALL vs try/catch

    - by Tim
    I've been using c++ for a while, and I'm familiar with normal try/catch. However, I now find myself on Windows, coding in VisualStudio for COM development. Several parts of the code use things like: TRY { ... do stuff } CATCH_ALL(e) { ... issue a warning } END_CATCH_ALL; What's the point of these macros? What benefit do they offer over the built-in try/catch? I've tried googling this, but "try vs TRY" is hard to search for.

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  • In LINQ-SQL, wrap the DataContext is an using statement - pros cons

    - by hIpPy
    Can someone pitch in their opinion about pros/cons between wrapping the DataContext in an using statement or not in LINQ-SQL in terms of factors as performance, memory usage, ease of coding, right thing to do etc. Update: In one particular application, I experienced that, without wrapping the DataContext in using block, the amount of memory usage kept on increasing as the live objects were not released for GC. As in, in below example, if I hold the reference to List of q object and access entities of q, I create an object graph that is not released for GC. DataContext with using using (DBDataContext db = new DBDataContext()) { var q = from x in db.Tables where x.Id == someId select x; return q.toList(); } DataContext without using and kept alive DBDataContext db = new DBDataContext() var q = from x in db.Tables where x.Id == someId select x; return q.toList(); Thanks.

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  • How to share code with continuous integration

    - by alchemical
    I've just started working in a continuous integration environment (TeamCity). I understand the basic idea of not getting so abstracted out in your code that you are never able to build it to test functionality, etc. However, when there is deep coding going on, occasionally it will take me several days to get buildable code--but in the interim other team members may need to see my code. If I check the code in, it breaks the build. However, if I don't check it in, my team members are unable to see the most recent work. I'm wondering how this situation is best dealt with.

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  • Why does IIS not support chunked transfer encoding?

    - by Graeme Perrow
    I am making an HTTP connection to an IIS web server and sending a POST request with the data encoded using Transfer-Encoding: chunked. When I do this, IIS simply closes the connection, with no error message or status code. According to the HTTP 1.1 spec, All HTTP/1.1 applications MUST be able to receive and decode the "chunked" transfer-coding so I don't understand why it's (a) not handling that encoding and (b) it's not sending back a status code. If I change the request to send the Content-Length rather than Transfer-Encoding, the query succeeds, but that's not always possible. When I try the same thing against Apache, I get a "411 Length required" status and a message saying "chunked Transfer-Encoding forbidden". Why do these servers not support this encoding?

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  • Is url.openStream harmful?

    - by Casebash
    I was using the java.net.URL.openStream() method to retrieve content from the server. I recently ran into an issue where the HTTP Response code indicated an error, but instead of throwing an exception, the stream still was read anyway. This caused the error to appear much later in the execution and proved to be a red herring. As far as I can see, when you have opened a stream using this method, there is no way to check the HTTP response code. The only way I could find to handle this properly was to use code such as: HttpURLConnection conn=(HttpURLConnection) url.openConnection() if(conn.getResponseCode()!=HttpStatus.SC_OK) //Raise Exception; InputStream in=conn.getInputStream() So do you agree? Is it possible to use openStream safely, or is it a method that should be avoided at all costs. It is worth noting that Sun uses the method in their tutorial code for reading directly from a URL. Then again, the code throws Exception so it isn't exactly a bastion of good coding practices.

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  • C# Winforms ADO.NET - DataGridView INSERT starting with null data

    - by Geo Ego
    I have a C# Winforms app that is connecting to a SQL Server 2005 database. The form I am currently working on allows a user to enter a large amount of different types of data into various textboxes, comboboxes, and a DataGridView to insert into the database. It all represents one particular type of machine, and the data is spread out over about nine tables. The problem I have is that my DataGridView represents a type of data that may or may not be added to the database. Thus, when the DataGridView is created, it is empty and not databound, and so data cannot be entered. My question is, should I create the table with hard-coded field names representing the way that the data looks in the database, or is there a way to simply have the column names populate with no data so that the user can enter it if they like? I don't like the idea of hard-coding them in case there is a change in the database schema, but I'm not sure how else to deal with this problem.

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  • How to kill mysql process through C#.

    - by deepesh khatri
    I am getting "too many connections" problem in an Asp .Net Mvc application which get fix when i manually kill process through Mysql v6.56 IDE, But on remote hosting computer where i can't kill process each time how can i fix this error. I have tried making a connection to information_schema DB's PROCESSLIST table but when connection is about to execute command there comes an error "access denied of root@loclahostto information_schema". I also have tried to grant all privileges to root@loclahost but still i am not able to fix this problem. I have been coding the same way from last two years but in this application i am getting this problem i have use close each connection in every method. Please if some one have ever got this problem or know the answer.Please help me. Thanx in advance

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  • HTML Slider element?

    - by Claudiu
    I'm coding an app (temporarily up here), and I want to make its parameters modifiable. I feel the best way to do this would be with your standard GUI slider elements (a la this, but not so ugly). I just noticed that the DOM doesn't provide these, however... What's the best way to introduce sliders to a webpage? Is there a standard library that everybody uses? Should I just roll my own? Or should is there a different element I can use? Should I embed them in the canvas element somehow?

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  • How is the iPhone SMS compose view implemented?

    - by erotsppa
    Regarding the SMS compose view as show in the picture below: I have two questions: 1) How is the text entry box implemented? There are no standard control from the API and the box is smart enough to resize when you press enter OR when the text is too long. Also the bar resizes with it. How is this done with the least coding? 2) How to code it such that when the keyboard shows up the whole view shifts up? Typically when the keyboard shows, it goes over your current view.

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  • Is there any specific available method in jsp/Servlet API which tell you from which page the request

    - by anubhavjain86
    Hi, I have been working in Oracle iStore from past 4 months and i have been managing the application without any IDE (basically doing all the chores on notepad only because application has been designed poorly and no IDE can support it). Since the coding is done on simple notepad files it is very hard to find out the bugs in the application. I am facing a problem that i have not idea which jsp page redirect the control to which jsp page. For instance, there are two jsp pages A.jsp and other is B.jsp. Now the browser is currently displaying A.jsp. When the user click on submit button (available on A.jsp) the form submits and redirects the control to B.jsp. Now my problem is that i know i am coming on B.jsp but, i don't know that A.jsp is redirecting the control to B.jsp. Is there an method available in Servlet API which tells Which jsp is redirecting the control to B.jsp? Sorry for making you read so much long story :( appreciate ur help in advance Best Regards Anubhav

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  • How to read a csv file with python

    - by john
    Hello, I'm trying to read a csv file but it doesn't work. I can read my csv file but when I see what I read, there where white space between values. Here is my code # -*- coding: iso-8859-1 -*- import sql_db, tmpl_macros, os import security, form, common import csv class windows_dialect(csv.Dialect): """Describe the usual properties of unix-generated CSV files.""" delimiter = ',' quotechar = '"' doublequote = 1 skipinitialspace = 0 lineterminator = 'n' quoting = csv.QUOTE_MINIMAL def reco(d): cars = {210:'"', 211:'"', 213:"'", 136:'à', 143:'è', 142:'é'} for c in cars: d = d.replace(chr(c),cars[c]) return d def page_process(ctx): if ctx.req_equals('catalog_send'): if 'catalog_file' in ctx.locals.__dict__: contenu = ctx.locals.catalog_file[0].file.read() #contenu.encode('') p = csv.reader(contenu, delimiter=',') inserted = 0 modified = 0 (cr,db) = sql_db.cursor_get() for line in p: if line: logfile = open('/tmp/test.log', 'a') logfile.write(line[0]) logfile.write('\n') logfile.write('-----------------------------\n') logfile.close()

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  • Array Vs. Linked List

    - by Onorio Catenacci
    I apologize--this question may be a bit open-ended but I think there are probably definite, quantifiable answers to it so I'll post it anyway. A person I know is trying to learn C++ and software development (+1 to him) and he asked me why someone would want to use a linked list in preference to an array. Coding a linked list is, no doubt, a bit more work than using an array and he wondered what would justify the additional effort. I gave him the answer I know: insertion of new elements is trivial in linked list but it's a major chore in an array. But then I got to thinking about it a bit more. Besides the ease of insertion of a new element into a linked list are there other advantages to using a linked list to store a set of data vs. storing it in an array? As I said, I'm not meaning to start a long and drawn-out discussion. I'm just looking for other reasons that a developer might prefer a linked list to an array.

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  • How do you keep a balance between working, training, health and family?

    - by Jim Burger
    One trend I see in the awesome developers I've met, is that they devote inordinate amounts of time to coding at the expense of (usually) their health. Personally, I also find it hard to motivate myself to keep healthy. Every now and again, I meet a fantastic coder who has it clocked; they are up to date with the latest dev news, have time to read about good programming practices, and to finish it off, have happy wives/husbands and families. How do you guys/gals manage it in the short 24 hours a day that we all have?

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  • SQL Server replication - how to sync tables from internal database to read-only website database

    - by frankadelic
    I have an internal SQL Server 2005 database "ADMIN_DATA" that is used by admin users. We would like to sync three of the database tables in ADMIN_DATA out to another SQL Server 2005 database "WEB_DATA", which is used by a public web app. WEB_DATA is read-only - only SELECT statements are allowed, while ADMIN_DATA is updated all the time. What is the best solution? How can this be accomplished with minimal custom coding and/or changes to database tables? Notes: ADMIN_DATA and WEB_DATA are different physical machines and on different subnets. The syncing operation doesn't need to be instantaneous.

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  • I need to block my feed completly

    - by justjoe
    i'm in need a solution via coding. on how to completely hide my blog feed. I know how to optimize related hook and filter such as 'the_excerpt_rss' and 'the_post_rss'. And also understand how to limit access or make my blog private. so, the question is more about howto blocking feed access without make my blog private ? i hope the solution will be not some apache .htacceess. Cause i need to code it directly into my theme.. sorry if this's too much to asked.

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  • f# naming conventions.. WTF??!!

    - by Peter Goras
    let w t f = have I missed something? do all value names in F# have to be a single char? preferably x? and do all method names have to abbreviated to a cryptic four chars?? we've had it rammed down our throats for years about descriptive variable/method names in other languages but now this doesnt apply to F#? or it is some coding 'style' bollox? Learning from code examples is hard enough with type inference. why make it harder?

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  • CSS for https urls

    - by Vincent
    Hello, looking for some help with images referenced within the stylesheet. I have no problems with these from non secure locations within the site but only from https. The stylesheet loads fine and displays everything correctly except for the images. example: body { margin: 0; padding: 0; background: url(/img/background_tile.gif) top left repeat-x; text-align: center; background-color: #fff; } All my css files and other image paths inside the code use relative urls to images. How can I make sure they all work fine without hard coding my image paths with https or http? I want the code to work fine with http and https. Thanks

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  • Pohlig–Hellman algorithm for computing discrete logarithms

    - by drelihan
    Hi Folks, I'm working on coding the Pohlig-Hellman Algorithm but I am having problem understand the steps in the algorithm based on the definition of the algorithm. Going by the Wiki of the algorithm: http://en.wikipedia.org/wiki/Pohlig%E2%80%93Hellman_algorithm I know the first part 1) is to calculate the prime factor of p-1 - which is fine. Howeever, I am not sure what I need to do in steps 2) and 3). Can someone help with explaining this in plain english (i) - or pseudocode. I want to code the solution myself obviously but I cannot make any more progress unless i understand the algorithm. Note: I have done a lot of searching for this and I read S. Pohlig and M. Hellman (1978). "An Improved Algorithm for Computing Logarithms over GF(p) and its Cryptographic Significance but its still not really making sense to me. Thanks in advance

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