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  • startsWith using error in java

    - by user1838839
    defined variable: LinkedList list1=new LinkedList(); Object get() in list1 obtains a node of list1 Object remove() in list1 deletes a node of list1 count() is length of list1 for(int i=1;i<list1.count();i++){ if(list1.get(i).startsWith('"',0)) //Error here list1.remove(i); } Error: cannot find symbol symbol: method charAt(int) location: class Object how to fix this problem? I would like to delete the node in list1 which starts with (").

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  • Cancel the calculation if input-mismatch was found

    - by Lert Pianapitham
    Hallo everybody, i have programmed a sub procedure, that will be called in the main procedure (called by event of mainForm), to valid the inputs before the main calculation. now i'm searching for a method, how can i cancel the calculation and refocus the mainForm if some inputs mismatch. i think, it's unnecessary to use the Try-Catch statment to trap the error from calculation because i know what is its source and it should be prevented due to the code preformance. Has someone an idea to due with this? best regards Lert Pianapitham

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  • Where to read the provided height value in an UITableViewCell?

    - by mystify
    I made a UITableViewCell subclass, and now I want that subclass to be "clever". It should align it's contents to the height of the row. But for this, the cell must know what height value was provided for it in this method: - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath However, no matter what value I assign here, my cell's frame is 44 px height at initialization time (default style). Is there any way I can get that value from the cell at initialization time?

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  • Converting IL to C# code

    - by Praveen
    Hi All, I need to convert the IL to c# code. I have an assembly and I am reading this assembly. I get MethodBody from MethodInfo and the methodbody has a method GetILAsByteArraY() which returns a byte array now I want to comvert this IL to C# code. Please help me out in solving this.

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  • how do I instrospect appengine's datastore models?

    - by python for ever
    in order to dynamically create a form, i have to find the property types of a model's properties at runtime. appengine docs says that Model.properties() will return a dictionary of properties name and their class type. when i use this method in my code, only the name is returned and the classtype value is always empty.

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  • Maintain state of an ASP.NET page

    - by user279521
    Hi, what is your preferred method to maintain state of an asp.net page, if it is a public website (involving shopping cart, wish-list etc). I am in the process of designing a website that will need to ensure that the user is not able to tamper with the state (such as delete cookies etc).

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  • Create a custom button

    - by Beppi Menozzi
    Sorry if this is too basic. I created a new class that extends Button: public class MyButton extends Button { private Context ctx; public MyButton(Context context) { super(context); ctx = context; } private void click() { // DO WHAT I NEED (FOR EXAMPLE CHANGE BACKGROUND) } } How can make it possible that, when I setOnClickListener() from another class where I instantiated this object, the click() method is called automatically? Thanks.

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  • What is the .NET equivalent of PHP var_dump?

    - by George Mauer
    I remember seeing a while ago that there is some method in maybe the Reflection namespace that would recursively run ToString() on all of an object's properties and format it nicely for display. Yes, I know everything I could want will be accessible through the debugger, but I'm wondering if anyone knows that command?

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  • Where does code within Script tags go in the resulting AS class?

    - by Hanno Fietz
    I was wondering what happens to the code contained in an <mx:Script> tag. If I define a function tehre, it just becomes a member function of the generated class. But I noticed that it seems OK for the compiler if I just write some (static) method calls there (specifically, I call Font.registerFont()). I feel kind of guilty for doing this, because I have no idea what's really happening and when the code gets executed.

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  • When To Use IEquatable And Why

    - by ChloeRadshaw
    I just dont understand this - What does IEuqtable buy you exactly?? The only reason I can see it being useful is when creating a generic type and forcing users to implement and write a good equals method. What am I missing

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  • Delegates with explicit "this" pointer?

    - by Qwertie
    Is it possible to adapt a method like this function "F" class C { public void F(int i); } to a delegate like Action<C,int>? I have this vague recollection that Microsoft was working on supporting this kind of adaptation. But maybe I misremembered!

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  • before_filter with dynamic information

    - by Lauren
    Hi I am trying to add a filter to a controller that is based on a certain role (using role_requirement) and then on the company_id that each user has. So basically I need something like this: require_role "company" ** This is working fine before_filter :company_required def company_required unless current_user.company_id == Company.find(params[:id]) end end The error I am receiving undefined method `company_id' for nil:NilClass I would appreciate any guidance. Thanks

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  • Entity Framework 4.0 GetChanges() equivalent

    - by Jonathan
    Hi In LINQ to SQL, you can override SubmitChanges and use the method this.GetChangeSet() to get all the inserts, updates and deletes so that you can make last minute changes before it is committed to the database. Can this be done in EF 4.0? I see there is a override for SaveChanges but I need to know the equivalent for GetChangeSet()

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  • Model def in View State

    - by tinzawtun
    In my ruby on rails project in model, I have some of definition. class PlaySport < ActiveRecord::Base belongs_to :user belongs_to :sport def self.getLevel end def self.check_play_sport(cuser_id,sport_id) end def current_playing_sport end def all_played_sports end end I catch for this relation like this current_user.play_sports.current_playing_sport But I get the undefined method error "current_playing_sports" What is wrong

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  • Empty String API arguments for actionwebservice received as "SOAP::Mapping::Object" instead of ""

    - by user311985
    I've built an API using actionwebservice and when a client calls a method to pass in an empty string (""), it's to_s value is # instead of "". But when the client passes in "hello", it's to_s value is "hello". class UsersApiController < ApiController web_service_api UserApi def create_or_update(arg1) Rails.logger.info arg1.to_s # Displays "#<SOAP::Mapping::Object:0x3a89c08>" if arg1 is an empty string end end

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  • Fetch html page content into a var

    - by Cipher
    Just a small question here, that how do we get fetch the html content via ajax into a variable that I could use later. Right now, I have a button on the click of which, I fetch another html page simply through load method as follows: $('#container').load('http://127.0.0.1/someUrl') I want to get the content into a var instead that I could at a later time use to append to the dom $('#someContainer').append(someVar)

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  • Navigate HTML Source while performing WatiN tests

    - by youwhut
    I am performing actions on the page during WatiN tests. What is the neatest method for asserting certain elements are where they should be by evaluating the HTML source? I am scraping the source but looking for a clean way to navigate the tags pulled back. UPDATE: Right now I am thinking about grabbing certain elements within HTML source using regular expressions and then analysing that to see if other elements exist within. Other thoughts appreciated.

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  • Why closed contours are guaranteed here?

    - by user198729
    Quoted from here: BW = edge(I,'zerocross',thresh,h) specifies the zero-cross method, using the filter h. thresh is the sensitivity threshold; if the argument is empty ([]), edge chooses the sensitivity threshold automatically. If you specify a threshold of 0, the output image has closed contours, because it includes all the zero crossings in the input image. I don't understand it,can someone elaborate?

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