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  • How do I set properties related to the calling method's scope?

    - by Thiado de Arruda
    I'm not looking for a way to associate values with a thread using the 'SetData' method. I need to store some kind of data that will only exist during the scope of a calling method, could be the immediate parent or any other call that is made down on the stack. For example: void SomeMethod() { string someInfo = "someInfo"; SomeOtherMethod(); object data = GetDataOnCurrentScope("someKey"); } void SomeOtherMethod() { SetDataOnParentScope("someKey", somevalue); } In this case both the 'someInfo' local variable and the data set with the "someKey" key will disapear after 'SomeMethod' returns. Is something like this possible? This may go against the rules of a stack, but who knows if someone has an idea...

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  • [Java6] Same source code, Eclipse build success but Maven (javac) fails

    - by EnToutCas
    Keep getting this error when compiling using Maven: type parameters of <X>X cannot be determined; no unique maximal instance exists for type variable X with upper bounds int,java.lang.Object Generics type interference cannot be applied to primitive types. But I thought since Java5, boxing/unboxing mechanism works seamlessly between primitive types and wrapper classes. In any case, the strange thing is Eclipse doesn't report any errors and happily compiles. I'm using JDK1.6.0_12. What could possibly be the problem here?

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  • LINQ Queries And Context

    - by Soo
    Hello SO, I have a slight issue with some code I'm writing if(parameter == 1) { var linq = from a in db.table select a; } else { var linq = from a in db.table where a.id = 1 select a; } foreach(var b in linq) { ... } So basically what's going on is that the variable "linq" is different depending on the value of "parameter". When I try to loop through "linq" with my foreach loop, I get an error about how linq doesn't exist in the current context. What is the best way to work around this type of issue?

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  • Android XML-RPC Serialization Issue

    - by Josh Pennington
    I am attempting to use Android XML-RPC and for some calls I get the following exception: W/System.err( 837): java.io.IOException: Cannot serialize java.lang.Object@43759748 It looks like it is having troubles serializing the returned data, but I cannot find much documentation on how to actually use Android XML-RPC. The way I am using Android XML-RPC is as follows: Object response = (Object)client.call("sales_order.list", new Object()); This one is pretty odd. I have tried setting this call up in a few different ways (using HashMaps, not passing second variable, etc) and the response I get is that sales_order.list is not a valid Method. I have been able to login to the service using the following code: this.sessionId = (String)client.call("login", this.apiUserName, this.apiPassword); Does anyone have any ideas or a good resource on how to use Android XML-RPC? Thanks

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  • Which one is better to have auto-implemented property with private setter or private field and property just getter?

    - by PLB
    My question may be a part of an old topic - "properties vs fields". I have situation where variable is read-only for outside class but needs to modified inside a class. I can approach it in 2 ways: First: private Type m_Field; public Type MyProperty { get { return m_Field; } } Second: public Type MyProperty { get; private set; } After reading several articles (that mostly covered benefits of using public properties instead of public fields) I did not get idea if the second method has some advantage over the first one but writing less code. I am interested which one will be better practice to use in projects (and why) or it's just a personal choice. Maybe this question does not belong to SO so I apologize in advance.

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  • Programming Quiz [closed]

    - by arin-s-rizk
    Hi one of my mates sent me this quiz see if you can guess the answers I will post mine later. In this quiz, some tasks related to the compilation process are listed. For each one of them, specify the part of the compiler that is responsible of performing it. Here are the possible answers: Lexical analyzer Parser Semantic analyzer None of the above Just fill the right choice (the number only) in the blank after each task: Checking that the parentheses in an expression are balanced _ _ _ _ _ Removing comments from the program _ _ _ _ _ Grouping input characters into "tokens" _ _ _ _ _ Reporting an error to the programmer about a missing (;) at the end of a C++ statement _ _ _ _ _ Checking if the type of the RHS (Right-Hand Side) of an assignment (=) is compatible with the LHS (Left-Hand Side) variable _ _ _ _ _ Converting the (AST) Abstract Syntax Tree into machine language _ _ _ _ _ Reporting an error about a strange character like '^' in a C++ program _ _ _ _ _ Optimizing the AST _ _ _ _ _

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  • How can I implement a login wall for expired or inappropriate pages?

    - by Redandwhite
    I am writing a website that very explicitly requires a login wall. Visitors should be required to log in before they are allowed to view a page. The page being built depends very much on the user's "ID". I am not sure how or where to store the user's login. I am not sure whether I should use a session variable (e.g. Session["userId"]), or some other method. The problem I see with session variables is that it's difficult to time out sessions. Note: I'm using C# 3.5 with ASP.NET in Visual Studio 2008.

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  • How to persist every new entity?

    - by simpatico
    I expect every instantiated entity to correspond to a tuple (& co) in the database. In the examples I see around, one always instantiates the entity (via a constructor) and then calls persist with that entity. I find this error-prone, and was wondering if it wasn't possible to have every instantiated entity automatically managed/persisted/reflected to the database (at least intended to). This also seems to prevent me from persisting instance variable entities. I.e. I've an entity which instantiates another (entities it has an association with) in its constructor.

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  • Render an asynchronous report, wider than the screen, without extra scrollbars

    - by Dubs
    I have an asynchronous local SSRS 2005 report that is of variable height and width, but routinely is bigger than the screen. I want to render it full size so that some of the report renders off screen and the only scrollbars the user sees are the ones on the browser window. What is the best way to accomplish this? The only method that I've found that even comes remotely close to what I want is to set static width/height values that are much larger than the report will ever be. But, this is undesirable since it leaves so much extra whitespace in the browser window. Has anyone had success rendering asynchronous reports without the extra scrollbars?

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  • Concatenating string with number in Javascript

    - by Sparky
    I'm trying to create a simple calculator in Javascript. I have an array named expression chunk[0] = 12 chunk[1] = + (the "+" sign) chunk[1] = 5 I used a for loop to loop through the chunks (chunk[]) and join then into a single expression as follows:- equation = ""; // To make var equation a string for(i = 0; i <= length; i++) { equation = equation + expression[i]; alert(expression[i]); } alert(equation); alert(expression[i]) showed values 12, + and 5. But alert(equation) showed 125 (instead of "12+5"). I need the variable equation to be "12+5" so that I can later call eval(equation) and get the value of 12+5. What am I doing wrong here?

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  • Explicit constructor still has default values even though a default constructor is not invoked.

    - by Phoenix
    According to my understanding a default constructor initializes the state of the object to default values, so if i provide an explicit no-arg public constructor like this then how are the values of d and e still getting initialized to zero because in this case the default constructor is not invoked. public class B extends A{ private int d; private int e; public B() { System.out.println(d); System.out.println(e); } } EDIT:: The only thing default constructor does is call to super() then how come if i have a explicitly mentioned a constructor here and A has a protected variable say c which is initialized to 17 in its constructor. Should I not be explicitly calling super() to be able to see that change since I'm using my own constructor ? Why is B still getting the value of 17 through inheritance ?

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  • Efficient bitshifting an array of int?

    - by nn
    Hi, To be on the same page, let's assume sizeof(int)=4 and sizeof(long)=8. Given an array of integers, what would be an efficient method to bitshift the array to either the left or right? I am contemplating an auxiliary variable such as a long, that will compute the bitshift for the first pair of elements (index 0 and 1) and set the first element (0). Continuing in this fashion the bitshift for elements (index 1 and 2) will be computer, and then index 1 will be set. I think this is actually a fairly efficient method, but there are drawbacks. I cannot bitshift greater than 32 bits. I think using multiple auxiliary variables would work, but I'm envisioning recursion somewhere along the line.

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  • Can I increase the scope of 'this' in the following example?

    - by Stomped
    In using a jquery callback, I found that 'this' isn't defined anymore. I've found a work around, which is to set 'this' to another variable. For example, like so: function handler(DATA) { myThis = this; $.post( 'file.php', DATA, function() { // THIS where I need access to 'this', but its not available // unless I've used the 'myThis' trick above } ); } It works like this, but I am always looking for 'the right way' or 'the better way' to do things. Is this the best way? or is there another?

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  • Can I use a static var to "cache" the result? C++

    - by flyout
    I am using a function that returns a char*, and right now I am getting the compiler warning "returning address of local variable or temporary", so I guess I will have to use a static var for the return, my question is can I make something like if(var already set) return var else do function and return var? This is my function: char * GetUID() { TCHAR buf[20]; StringCchPrintf(buf, 20*sizeof(char), TEXT("%s"), someFunction()); return buf; } And this is what I want to do: char * GetUID() { static TCHAR buf[20]; if(strlen(buf)!=0) return buf; StringCchPrintf(buf, 20*sizeof(char), TEXT("%s"), someFunction()); return buf; } Is this a well use of static vars? And should I use ZeroMemory(&buf, 20*sizeof(char))? I removed it because if I use it above the if(strlen...) my TCHAR length is never 0, should I use it below?

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  • PHP Extract Values From One String Based on a Pattern Defined in Another

    - by ironkeith
    I have two strings: $first = '/this/is/a/string'; $second = '/this/:param1/a/:param2'; And I'm trying to get this: $params = array('param1' => 'is', 'param2' => 'string'); But getting from point a to b is proving more than my tired brain can handle at the moment. Anything starting with a ':' in the second string defines a variable name/position. There can be any number of variables in $second which need to be extracted from $first. Segments are separated by a '/'. Thanks.

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  • Wrong cells values of UITableView per section

    - by androniennn
    I have a UITableView that has a different rows count in every section. I made that code to try achieving a correct result: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier= @"channel"; ChannelsCell *cell= [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if(!cell) { cell =[[ChannelsCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } NSInteger rowsCountSection = [[arrayofChannelsCount objectAtIndex:indexPath.section] intValue];// this variable has the number of rows of every section NSUInteger pos = indexPath.section*count+ indexPath.row; cell.channelName.text=[arrayofChannelName objectAtIndex:pos]; return cell; } I'm pretty sure that's a mathematic problem. Thank you for helping.

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  • How to evaluate text strings provided by sed/grep/whatever?

    - by T.J.
    This is for UNIX shell programming. It have to be supported by multiple UNIX platforms including Solaris, Linux, and AIX. I have this scenario -- I am to read from a text file a string that may or may not contain an environment variable that may or may not be defined. For example: <foo.bar> This error code was found: $(error_code) I have the following code: statement=$(sed -n $1'p' $messagefile) echo $echo_flag $statement $1 = line number supplied to this particular function/script. $messagefile = filename of log file. $echo_flag = "-e" in Linux, otherwise, empty. $(error_code) = 42. Instead of getting this when running: <foo.bar> This error code was found: 42 I still get this: <foo.bar> This error code was found: $(error_code) How exactly do I tell the shell script that the value of statement should be evaluated further beyond what sed have done?

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  • Whats the best to way convert a set of Java objects to another set of objects?

    - by HDave
    Basic Java question here from a real newbie. I have a set of Java objects (of class "MyClass") that implement a certain interface (Interface "MyIfc"). I have a set of these objects stored in a private variable in my class that is declared as follows: protected Set<MyClass> stuff = new HashSet<MyClass>(); I need to provide a public method that returns this set as a collection of objects of type "MyIfc". public Collection<MyIfc> getMyStuff() {...} How do I do the conversion? The following line gives me an error that it can't do the conversion. I would have guessed the compiler knew that objects of class MyClass implemented MyIfc and therefore would have handled it. Collection<MyIfc> newstuff = stuff; Any enlightenment is appreciated.

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  • strange behaviour of static method

    - by Cristian Boariu
    Hi, I load a js variable like this: var message = '<%= CAnunturi.CPLATA_RAMBURS_INFO %>'; where the static string CPLATA_RAMBURS_INFO i put like: public static string CPLATA_RAMBURS_INFO = "test"; I use it very well in this method. <script type="text/javascript"> var categoryParam = '<%= CQueryStringParameters.CATEGORY %>'; var subcategoryParam = '<%= CQueryStringParameters.SUBCATEGORY1_ID %>'; var message = '<%= CAnunturi.CPLATA_RAMBURS_INFO %>'; function timedInfo(header) { $.jGrowl(message, { header: header }); }; </script> so the message appears. I do not undersand, why, iso of "test", if i take the value from a static method, ths use of message js var is no longer succesfull (the message no longer appears). public static string CPLATA_RAMBURS_INFO = getRambursInfo(); public static string getRambursInfo() { return System.IO.File.ReadAllText(PathsUtil.getRambursPlataFilePath()); } Any help would be highly appreciated....

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  • RSpec View testing: How to modify params?

    - by sebastiangeiger
    I am trying to test my views with RSpec. The particular view that is causing me troubles changes its appearance depending on a url parameter: link_to "sort>name", model_path(:sort_by => 'name') which results in http://mydomain/model?sort_by=name My view then uses this parameter like that: <% if params[:sort_by] == 'name' %> <div>Sorted by Name</div> <% end %> The RSpec looks like this: it "should tell the user the attribute for sorting order" do #Problem: assign params[:sort_for] = 'name' render "/groups/index.html.erb" response.should have_tag("div", "Sorted by Name") end I would like to test my view (without controller) in RSpec but I can't get this parameter into my params variable. I tried assign in all different flavours: assign[:params] = {:sort_by => 'name'} assign[:params][:sort_by] = 'name' ... no success so far. Every idea is appreciated.

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  • How to make bottom half of a page take up remaining height?

    - by RobVious
    I've searched and tried a bunch of different things. I have a variable-height tophalf, and the bottom half should fill up the remaining space. A JSfiddle: http://jsfiddle.net/UCJmQ/ CSS: .top { background-color: lightblue; height: 300px; } .bottom { background-color: green; min-height: 100px; overflow: hidden; height: 100%; } html, body { height: 100%; } HTML: <div class="top"></div> <div class="bottom"> </div> What I'm seeing now is the green page taking up the entire window's height, not the remaining height. How can I make it take the remaining height instead?

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  • javascript timer fires up on the first key press

    - by pedrag
    I have a html page with a timer in it. I'm starting the timer with the keypress event, but i want it to execute only for the first key. I'm using a variable to catch the total keys in an other function which there were pressed and i have something like that: if(totaAttempts==1) start the timer, but with this solution the timer starts correctly, but is stomps when a key is pressed again. Any better ideas? Thanks in advance function setTime() { if (totalAttempts == 1) { ++totalSeconds; secondsLabel.innerHTML = pad(totalSeconds % 60); minutesLabel.innerHTML = pad(parseInt(totalSeconds / 60)); } } function pad(val) { var valString = val + ""; if (valString.length < 2) { return "0" + valString; } else { return valString; } }

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  • C# Array Maximum

    - by Betamoo
    I have 2 arrays named Arr1 and Arr2 in C#. They are of the exact same dimensions... I need to get the element of Arr1 corresponding to maximum of elements in Arr2 beginning with given indices ... e.g Get indices of the max of Arr2 [ 1 , 10 , 3 , i , j ] for all i,j Return Arr1 [ 1 , 10 , 3 , i , j ] Of course I need the elegant solution (not the "loop for them" one...) Please Note: I do not want to loop through the arrays, because it is 11 dimensional!!.. the code will be ugly and error prone.. and I may run out of variable names :)

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  • Getting instance of a class in ArrayList

    - by user1499974
    I have a small problem with ArrayList. You see, I wish to get an instance of RenderNewHUD in my renderer class, which has a list of registered renderers. I did not want to create a variable for this due to limitations and awkwardness. Here is my code. RenderNewHUD hud = renderer.renderList.get(RenderNewHUD()); How exactly can I go along getting the instance of RenderNewHUD without creating a new instance? If you need any more of my code, just ask. Sorry if this is a very dumb question - I have looked EVERYWHERE for an answer.

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  • const ready only local copies

    - by robUK
    Hello gcc 4.4.4 c89 I am just wondering is it worth passing a const into a function. i.e. void do_something(const char *dest, const int size) The size is a ready-only so I don't want to change it. However, some developers never have this as const has it is a local copy that is being used. The pointer is const as you can change the value in the calling routine. I always have a const on ready-only local copies, as it confirms to anyone reading my code that it is a ready-only variable. And also, when coding I don't make the mistake of changing it without realizing. Many thanks for any suggestions,

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