Search Results

Search found 28841 results on 1154 pages for 'simple'.

Page 795/1154 | < Previous Page | 791 792 793 794 795 796 797 798 799 800 801 802  | Next Page >

  • Why the streams in C++?

    - by oh boy
    As you all know there are libraries using streams such as iostream and fstream. My question is: Why streams? Why didn't they stick with functions similar to print, fgets and so on (for example)? They require their own operators << and >> but all they do could be implemented in simple functions like above, also the function printf("Hello World!"); is a lot more readable and logical to me than cout << "Hello World"; I also think that all of those string abstractions in C++ all compile down to (less efficient) standard function calls in binary.

    Read the article

  • Where to declare variable? C#

    - by user1303781
    I am trying to make an average function... 'Total' adds them, then 'Total' is divided by n, the number of entries... No matter where I put 'double Total;', I get an error message. In this example I get... Use of unassigned local variable 'Total' If I put it before the comment, both references show up as error... I'm sure it's something simple..... namespace frmAssignment3 { class StatisticalFunctions { public static class Statistics { //public static double Average(List<MachineData.MachineRecord> argMachineDataList) public static double Average(List<double> argMachineDataList) { double Total; int n; for (n = 1; n <= argMachineDataList.Count; n++) { Total = argMachineDataList[n]; } return Total / n; } public static double StDevSample(List<MachineData.MachineRecord> argMachineDataList) { return -1; } } } }

    Read the article

  • Rails: saving a string on an object -- syntax problem?

    - by Veep
    Hey there, I am trying to write a simple function to clean a filename string and update the object. When I save a test string it works, but when I try to save the string variable I've created, nothing happens. But when I return the string, the output seems to be correct! What am I missing? def clean_filename clean_name = filename clean_name.gsub! /^.*(\\|\/)/, '' clean_name.gsub! /[^A-Za-z0-9\.\-]/, '_' clean_name.gsub!(/\_+/, ' ') #update_attribute(:filename, "test") #<-- correctly sets filename to test #update_attribute(:filename, clean_name) #<-- no effect????? WTF #return clean_name <-- seems to returns the correct string end Thank you very much.

    Read the article

  • Android - How can I access a View object instantiated in onCreate in onResume?

    - by Chris
    In my onCreate() method, I'm instantiating an ImageButton View: public void onCreate(Bundle savedInstanceState) { Log.d(AntengoApplication.LOG_TAG, "BrowsePicture onCreate"); super.onCreate(savedInstanceState); setContentView(R.layout.layout_post); final ImageButton ib = (ImageButton) findViewById(R.id.post_image); ... In onResume, I want to be able to change the properties of the ImageButton with something like: @Override protected void onResume() { super.onResume(); ib.setImageURI(selectedImageUri); } //END onResume But onResume doesn't have access to the ib ImageButton object. If this were a variable, I'd simple make it a class variable, but Android does not allow you to define View object in the class. Any suggestions on how to do this?

    Read the article

  • Proper chart scaling in Reporting Services 2005

    - by lastas
    I'm developing a simple bar-chart in Reporting Services 2005 with a stored procedure as data-source. The values in this graph can be both positive and negative, and can span a very big range, and hence I cannot specify any non-dynamic scale that will work for all scenarios. The problem I'm facing is that the automatic scaling pretty much sucks. I get no line to show where the zero-point is, and the y-scale labels are from top to bottom: 8818 -191181 -391181 etc etc... So my question is, what is the best approach to make the scale more adapted to human reading? Is there any guide out there? Does reporting services 2008 handle this better? Also, moving away from Reporting Services is not really an option. I realize how to put values and expression in the max, min, and the gridline interval fields, although its more of a question what expressions I should put there.

    Read the article

  • Java: Anyone know of a library that detects the quality of an internet connection?

    - by Zombies
    I know a simple URLConnection to google can detect if I am connected to the internet, after all I am confident that the internet is all well and fine If I cant connect to google. But what I am looking for at this juncture is a library that can measure how effective my connection to the internet is in terms of BOTH responsiveness and bandwidth available. BUT, I do not want to measure how much bandwidth is potentially available as that is too resource intensive. I really just need to be able to test wether or not I can recieve something like X kB's in Y amount of time. Does such a library already exist?

    Read the article

  • Passing a variable that can be updated

    - by Rob Bonner
    This seems like a simple thing, but can't get it to work. I pass a variable into a UIViewController thourgh a standard property: [aViewController setProposedDate:proposedWorkLog.entryDate]; which is retained by the controller, and possible changed. I have verified that in the controller, the data is modified. But, after it is popped off the stack and I look in the calling view, the data has not been updated. Is there a way to pass this variable and have it retain the new value, or a way to pass back a response from a closing view controller? Thanks!

    Read the article

  • Is git revert broken?

    - by sabgenton
    The following pastebin is a repo with one file with one, two, three, four, five typed on each line. Each line was commited separately into git: http://pastebin.ca/raw/2136179 I then tried to delete the line two with the command git revert <commmit which creates two> And get: error: could not revert b4e0a66... second hint: after resolving the conflicts, mark the corrected paths hint: with 'git add <paths>' or 'git rm <paths>' hint: and commit the result with 'git commit' There should be no conflict for something this simple? Or am I doing it wrong/got the wrong command? The merge details don't seem to make sense either: one <<<<<<< HEAD two three four five ======= >>>>>>> parent of b4e0a66... second Isn't that saying delete everything but one? I was expecting only two to be affected... git 1.7.10

    Read the article

  • Case Sensitivity of Action Names in Struts 2

    - by IK
    Is there an easy way to make Struts 2 action names case insensitive? Currently I have the following action defined: <action name="printTest" class="MyClass" > <result name="error">/WEB-INF/jsp/error.jsp</result> <result name="input">/WEB-INF/jsp/test.jsp</result> <result name="success">/WEB-INF/jsp/test.jsp</result> </action> If the user types URL "/app/printtest.do" instead of "/app/printtest.do" this action is not executed. Other then mod_rewrite on the httpd level or something like that, the only option that I know about right now is simply adding the same exact action and changing the name to "printtest". Ideally it would be a simple config change to struts.xml

    Read the article

  • Using different validation rules based on user input.

    - by chiefanov
    I have a simple form: a combobox and a textbox. My combobox has 2 values: A and B. When value A is selected I want textbox to use a validation rule. When value B is selected there should be no validation rules applied to the textbox. I've read an article that has a solution and I'm trying to use it, but had no luck so far, and I think there might be a more elegant solution. Has anyone done anything like this before? Any ideas are highly appreciated.

    Read the article

  • Second largest number in list python

    - by Manu Lakaster
    So I have to find THE SECOND LARGEST NUMBER IN A LIST. I am doing it through simple loops.My approach is I am going to divide a list into two parts and then find the largest number into two parts and then compare two nuumbers. I will choose the smaller number from two of them. I can not use ready functions or different approaches. Basically, this is my code....But it does not run correctly....Help me please to fix it because I spent a lot of time on it :( Thanks....P.S. Can we use indices to "divide" a list ??? #!/usr/local/bin/python2.7 alist=[-45,0,3,10,90,5,-2,4,18,45,100,1,-266,706] largest=alist[0] h=len(alist)/2 m=len(alist)-h print(alist) for i in alist: if alist[h]>largest: largest=alist[h] i=i+1 print(largest)

    Read the article

  • How does one find a '.' in a string object in Object-C

    - by NaZer
    I am working on getting a simple calculator working as part of my adventure to learning Object-C and iOS development. In Object-C using NSString, how does one look for a period in a string? Based on the comments this is what I got so far. NSString * tmp = [display text]; NSLog(@"%@", tmp); // Shows the number on the display correctly int x = [tmp rangeOfString:@"."].location; NSLog(@"%i", x); // Shows some random signed number if (x < 0) { [display setText:[[display text] stringByAppendingFormat:@"."]]; } It is still not working :(

    Read the article

  • OpenCV (c++) multi channel element access

    - by Vic
    I'm trying to use the "new" 2.0 c++ version of OpenCV, but everything is else like in simple C version. I have some problem with changing the values in image. The image is CV_8UC3. for (int i=0; i<image.rows; i++) { for (int j=0; j<image.cols; j++) { if (someArray[i][j] == 0) { image.at<Vec3i>(i,j)[0] = 0; image.at<Vec3i>(i,j)[1] = 0; image.at<Vec3i>(i,j)[2] = 0; } } } It's not working. What am I doing wrong??? Thank you!

    Read the article

  • Is there a Ruby on Rails framework like equivalent for .NET development?

    - by wgpubs
    Answers like ASP.NET MVC or Entity Framework really aren't acceptable as they address just one aspect of the problem domain. I'm looking for a framework ... a REAL framework that gives me the same features out of the box that Rails does. As such it should include at minimum: MVC for presentation ORM Ability to provide simple configuration for whatever environment (dev, QA, Production, etc...) Migration like functionality Ability to generate code in all layers (similar to scaffolding like behavior, etc...) Project template so as to create similar functionality as the "rails my_app" command. Thanks.

    Read the article

  • Are there actually lag times to remove an email address from "the system"? [closed]

    - by Alex Gosselin
    For example, you send an unsubscribe message to a legitimate company or a spam, they reply that they will remove you and it may take up to 72 hours to take effect. I find it hard to believe anything that simple could take more than 3/4 of a second to take effect system wide. Another example would be when you call the visa activation line, there is a "delay" of several minutes while they try to sell you some kind of insurance. Usually just as you get the point across that you don't want it they will tell you your card has been activated and let you go. Are these delays real?

    Read the article

  • Updateable Priority Queue

    - by user1427661
    Is there anything built into the C++ Standard Library that allows me to work in a priority queue/heap like data structure (i.e., can always pop the highest value from the list, can define how the highest value is determined for custom classes, etc.) but allows me to update the keys in the heap? I'm dealing with fairly simple data, pairs to be exact, but I need to be able to update the value of a given key within the heap easily for my algorithm to function. WHat is the best way to achieve this in C++?

    Read the article

  • Background text in a Bootstrap WELL

    - by patrick
    I have a problem putting a text in the background of a Bootstrap well. I first posted the problem in this question, but that was a too simple representation of my problem. I'm looking for an effect created in this jFiddle, a text in the background of a menu. The example works how I want to to work, but when I put this in a Bootstrap Well I get this (http://jsfiddle.net/aBqw8/21/). The background text disappears, it's probably behind the Well. When I remove the background color from the well I can see the text. If I remove the "position:relative" from the span it shows the title, but then it interferes with the menu, which is what I am trying to avoid. Thanks for your help!

    Read the article

  • Difference between :: and -> in PHP

    - by vrode
    I always see people in serious projects use :: everywhere, and - only occasionally in local environment. I only use - myself and never end up in situations when I need a static value outside of a class. Am I a bad person? As I understand, the only situation when -> won't work is when I try following: class StaticDemo { private static $static } $staticDemo = new StaticDemo( ); $staticDemo->static; // wrong $staticDemo::static; // right But am I missing out on some programming correctness when I don't call simple public methods by :: ? Or is it just so that I can call a method without creating an instance?

    Read the article

  • C++ string how to

    - by typoknig
    This is a very simple question and I feel stupid for asking it, but I am pressed for time and I need to figure it out :) I just need to know how to make a string that contains text and other variables. For instance in Java I can just do this: String someString; for(int i = 0; i>10; i++){ someString = ("this text has printed " + i + " times"); //how do I create this line in C++? System.out.println(someString); i++; }

    Read the article

  • Decoding MIME (HTML+Attachments)

    - by MH
    I'm planning to write an application that should handle incoming mails. Basically it will act more like a ticketing system than a webmail, so I'm only interested in receiving emails, and not sending them. I have made a simple prototype that downloads mails and displays the text with downloadable attachments in a web page, but handling mails from Outlook and others is more complicated. I have looked at some of the open source ticketing systems out there, but most of the code is tied to the system and is hard to separate. Is there a library that understands "rich" mail and makes this job simpler? Preferably in Python, Java, Ruby or Perl. I'm also open to suggestions for any command line mail clients that can be used for this, since the system will not receive large amounts of mail and can afford to launch external processes.

    Read the article

  • c# user notification while waiting

    - by user315445
    Hi, I am writing a simple win forms app in C#. There is a method call in my method which loads files but is taking a while to respond. Below is the method call Directory.GetFiles(selectedFolder, "*.xml", SearchOption.AllDirectories); I want to notify this to users. Is there a way to show them that file loading is in progress? I want a simplest way. I suppose Splash screen is too costly for my app. Thanks, Sid

    Read the article

  • javascript code to prevent screensaver from starting

    - by gertjan
    Hi all, I am completely new to javascript programming and I have a question that I didn't manage to find an answer for anywhere. I have recently put together a simple slideshow to view the photos remotely that I host on my home computer. This by itself works fine. The problem I run into is that when I'm viewing photos I don't interact with the hardware, which after some time causes the monitor to switch off. This is particularly annoying when watching photos on my mobile phone. My question is: is there a way to prevent this from happening? I am thinking in the direction of faking a mouse or other event every time I refresh the photo, but I have no clue how to do that and if it is possible. Any help is greatly appreciated!

    Read the article

  • compare two characters based on subset

    - by schultem
    I have a simple dataframe with two columns: df <- data.frame(x = c(1,1,2,2,3), y = c(rep(1:2,2),1), target = c('a','a','a','b','a')) I would like to compare the strings in the target column (find out whether they are equal or not, i.e., TRUE or FALSE) within every level of x (same number for x). First I would like to compare lines 1 and 2, then 3 and 4 ... My problem is that I am missing some comparisons, for example, line 5 has only one case instead of two - so it should turn out to be FALSE. Variable y indicates the first and second case within x. I played around with ddply doing something like: ddply(df, .(x), summarise, ifelse(as.character(df[df$y == '1',]$target), as.character(df[df$y == '2',]$target),0,1)) which is ugly ... and does not work ... Any insights how I could achieve this comparison? Thanks

    Read the article

  • Store #VALUE! #NUM! #REF! in variable.

    - by Ommit
    So a simple version of what I'm trying to do. Say I know there is an error in cell(1,1), furthermore I know it is either #num!, #ref! or #value!, I want to be able to store the respective error message in a variable, so I can print it to a different sheet. This is what I tried and it clearly failed. Sub FindAndPrintErrors dim Store as string If IsError(Range("A1"))) = True Then Store = Range("A1").value 'it breaks here' end if range("B1") = Store end sub I know I can do this but I wonder if there is a better way. Sub FindAndPrintErrors2 dim Store If IsError(Range("A1"))) = True Then temp = Range("A1").value 'it breaks here' if temp = "error 2029" then store = "#num!" ' and so on' end if range("B1") = Store end sub

    Read the article

  • How are OpenGL programs debugged?

    - by manasij7479
    I'm trying to find what is causing a segfault when glDrawArrays is called (as gdb says) in my simple program. When I use the OpenGl calls directly, the program runs fine. But when I wrap them up into two classes (under construction, of vao and vbo) the program segfaults. So, in my wrappers, I definitly disabled something or set something I'm not supposed to. My question is, how do I get some diagnostics that will help me pinpoint the source of the problem ? I'm looking for something similar to what glGetShaderiv does, but for vao and vbo s, that will tell me if I have..say.. unbound a buffer by mistake. [I'm not posting the code here, but if any of you want to donate some time by testing a segfaulting example, here is a tar.gz of the source . You'll need working libraries of sfml-2.0rc, glew and gcc=4.6 .]

    Read the article

< Previous Page | 791 792 793 794 795 796 797 798 799 800 801 802  | Next Page >