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  • How does a custom accessor method implementation in Core Data look like?

    - by dontWatchMyProfile
    The documentation is pretty confusing on this one: The implementation of accessor methods you write for subclasses of NSManagedObject is typically different from those you write for other classes. If you do not provide custom instance variables, you retrieve property values from and save values into the internal store using primitive accessor methods. You must ensure that you invoke the relevant access and change notification methods (willAccessValueForKey:, didAccessValueForKey:, willChangeValueForKey:, didChangeValueForKey:, willChangeValueForKey:withSetMutation:usingObjects:, and didChangeValueForKey:withSetMutation:usingObjects:). NSManagedObject disables automatic key-value observing (KVO, see Key-Value Observing Programming Guide) change notifications, and the primitive accessor methods do not invoke the access and change notification methods. In accessor methods for properties that are not defined in the entity model, you can either enable automatic change notifications or invoke the appropriate change notification methods. Are there any examples that show how these look like?

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  • Writing a C Macro

    - by shaharg
    Hi, I have to write a macro that get as parameter some variable, and for each two sequential bits with "1" value replace it with 0 bit. For example: 10110100 will become 10000100. And, 11110000-00000000 11100000-100000000 I'm having a troubles writing that macro. I've tried to write a macro that get wach bit and replace it if the next bit is the same (and they both 1), but it works only for 8 bits and it's very not friendly... P.S. I need a macro because I'm learning C and this is an exercise i found and i couldn't solve it myself. i know i can use function to make it easily... but i want to know how to do it with macros. Thanks!

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  • In CSS, can "#footer #caption" coexist with "#content # caption"?

    - by Jian Lin
    I was going to "nest" the CSS ids like this #content #caption { color: teal } ... #footer #caption { margin: 2em 1em } because that's the way SASS (a CSS generator) can do nesting for... but then in one HTML document, we cannot have two ids with the same name, isn't that true, so the above nesting won't work or won't work well. (esp if document.getElementById() or $('#caption') or $('caption') is needed to select the element). We can use #content #content_caption { color: teal } ... #footer #footer_caption { margin: 2em 1em } but then why 1 more level of nesting? why not just #content_caption { color: teal } ... #footer_caption { margin: 2em 1em } ?

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  • GMap in iframe gets off-center

    - by Daj pan spokój
    I have a Google Map (API 2) that used to work fine as a standalone page. However, when I load the map page within an iframe (with Thickbox), the map gets off-center: normally it's centered over Germany and in the iframe it centers on Iran, instead. How to make the map center correctly? My guesses: The problem can result from the iframe loading time. I guess, that the script calculates window size basing on the iframe size when it's still loading. It's strange since I load the map when the document is ready. $(document).ready(function() { setupSearchForm(); setupMap(); setupResults(); }); For instance, when I refresh the already loaded iframe the center comes back to Germany. A sample of code loading the map

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  • Handling multiple exceptions

    - by the-banana-king
    Hi there, I have written a class which loads configuration objects of my application and keeps track of them so that I can easily write out changes or reload the whole configuration at once with a single method call. However, each configuration object might potentially throw an exception when doing IO, yet I do not want those errors to cancel the overall process so that the other objects are still given a chance to reload/write. Therefore I collect all exceptions which are thrown while iterating over the objects and store them in a super-exception, which is thrown after the loop, since each exception must still be handled and someone has to be notified of what exactly went wrong. However, that approach looks a bit odd to me. Someone out there with a cleaner solution? Here is some code of the mentioned class: public synchronized void store() throws MultipleCauseException { MultipleCauseException me = new MultipleCauseException("unable to store some resources"); for(Resource resource : this.resources.values()) { try { resource.store(); } catch(StoreException e) { me.addCause(e); } } if(me.hasCauses()) throw me; }

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  • Using Jquery and Ajax in ASP.NET

    - by xkcd
    I am using ajax and jquery to load contents into a div. My jquery looks like this $("a.trigger").click(function() { $.ajax({ type: "POST", url: "GetStuff.aspx", data: "id=0", success: function(response){ $("#contentDiv").html(response); } }); }); In GetStuff.aspx I would like to write some asp.net html controls like private void Page_Load(object sender, System.EventArgs e) { Response.Expires = -1; Response.ContentType = "text/plain"; Response.Write("<asp:Label id=\"label1\" runat=\"server\" text=\"helloworld\"/>"); Response.End(); } However the label does not appear on the page. I tried to put the asp:Label in my aspx file like this <%@ Page Language="C#" Inherits="Untitled.GetStuff" %> <asp:Label id="label12" runat="server" text="helloworld2"/> It also does not work. How can I get asp.net html controls to show up?

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  • Wrong image dimensions when it's dynamically loaded on a page the 1st time

    - by Nikita Barsukov
    I have the following piece of Javascript code on my web-page var central_image = document.createElement("img") central_image.setAttribute("src", imgs[curr_image_no - 1]); central_image.setAttribute("name", "jpeg"); document.getElementById("photo").appendChild(central_image); central_image.onload = getDimensions(); //function that alerts image dimensions Now, when the central_image is loaded for the 1st time in Firefox, its height always equals to 0. In IE its dimensions are 28 x 30 pixels. When I reload image, its dimensions are OK in both browsers. I guess the problem is that function getDimensions() starts before image was loaded completely. How to change that?

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  • Decoupling into DAL and BLL - my concerns.

    - by novice_man
    Hi, In many posts concerning this topic I come across very simple examples that do not answer my question. Let's say a have a document table and user table. In DAL written in ADO.NET i have a method to retries all documents for some criteria. Now I the UI I have a case where I need to show this list along with the names of the creator. Up to know I have it done with one method in DAL containig JOIN statement. However eveytime I have such a complex method i have to do custom mapping to some object that doesn't mark 1:1 to DB. Should it be put into another layer ? If so then I will have to resing from join query for iteration through results and querying each document author. . . which doen't make sense... (performance) what is the best approach for such scenarios ?

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  • Virtual Printer Driver for Windows

    - by bitsbunny
    Hello, can you please help me with the following questions... If I need a virtual printer that will convert a PostScript stream to a different format, do I have to implement a virtual printer from scratch or implement a rendering plug-in? The rendering plug-in seems to support only certain customizations. Also the data invariably goes to the spooler which is not needed in this case. If I implement a virtual printer driver does it completely replace the Microsoft PostScript Driver or the Microsoft Universal Driver? Since my driver is virtual, does it matter if I write a PostScript compliant or a Universal Driver compliant one? Any other method to convert a printed document to a custom document format apart from implementing a virtual printer driver? Can I hook on as a port monitor or something? From what I could understand I guess not.

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  • OpenXml - How to identify whether the paragraph extends to next page

    - by K.V.
    From aspx page, I dynamically add paragraphs to a word document using OpenXml SDK. In this case, a page break within a paragraph is not allowed. So in case a paragraph starts in middle of page 1 and extends to page2 then it should actually start in Page2. However, if it ends in the same page it is okay. How to achieve this? Is there a way to set in th document that page break is not allowed within a paragraph? Any input is highly appreciated.

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  • Bitfield With 3 States...?

    - by TheCloudlessSky
    I'm trying to create an authorization scheme for my ASP.NET MVC application where an Enum is used to set permissions. For example: [Flags] enum Permissions { ReadAppointments = 1, WriteAppointments = 2 | ReadAppointments, ReadPatients = 4, WritePatients = 8 | ReadPatients, ReadInvoices = 16, WriteInvoices = 32 | ReadInvoices ... } But I don't really like that because it really doesn't make it clear that Write always includes Read. I then realized that a requirement would be that a user might have NO access to, for example, Appointments. Essentially, I'd want a "bitfield" with 3 states: none, readonly, full (read/write). I'd like to still use an enum bitfield since it's easy to store in a DB (as an int). Also it's very easy to see if a permission is set. Does anyone have any idea how this could be easily accomplished using an Enum... or am I going in the completely wrong direction?

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  • when i click on checkbox ,the image should be hiden though i dont make it happen somehow and i can g

    - by user309381
    function Psend() { new Ajax.Request('Handler.ashx', { method: 'get', onSuccess: function(transport) { var response = transport.responseText || "no response text"; //alert("Success! \n\n" + response); var obj = response.evalJSON(true); for (i = 0; i < 4; i++) { DeCheBX = $('MyDiv').insert(new Element('input', { 'type': 'checkbox', 'id': "Img" + obj[i].Nam, 'value': obj[i].IM, 'onClick': 'SayHi(this,i)' })); document.body.appendChild(DeCheBX); DeImg = $('MyDiv').insert(new Element('img', { 'id': "img" + obj[i].Nam, 'src': obj[i].IM })); document.body.appendChild(DeImg); SayHi = function(x,i) { try { if ($(x).checked == true) { img = "img" + obj[i].Nam; alert(img); $('img').hide(); } } catch (e) { alert("error"); } }; } }, onFailure: function() { alert('Something went wrong...') } }); }

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  • Adding Runtime Intelligence Application Analytics for a library and not an application

    - by brickner
    I want to add usage statistics for a .NET 4.0 library I write on CodePlex. I try to follow the step described here but my problem lies with the fact that what I write is a library and not an application. One of the steps is put the Setup and Teardown attributes. I thought about adding the Setup attribute on a static constructor or a different place that will run once per usage of the library. My problem lies with the Teardown attribute that should be placed on code that ends the usage. I don't know where to put this attribute. Is it possible to get usage statistics on a library? Maybe I can register on an event that will fire when the application unloads the dll?

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  • How does this If conditional work in Python?

    - by Sergio Boombastic
    from google.appengine.api import users from google.appengine.ext import webapp from google.appengine.ext.webapp.util import run_wsgi_app class MainPage(webapp.RequestHandler): def get(self): user = users.get_current_user() if user: self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, ' + user.nickname()) else: self.redirect(users.create_login_url(self.request.uri)) application = webapp.WSGIApplication( [('/', MainPage)], debug=True) def main(): run_wsgi_app(application) if __name__ == "__main__": main() I don't understand how this line works: if user: self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, ' + user.nickname()) else: self.redirect(users.create_login_url(self.request.uri)) I'm guessing the users.get_current_user() return a boolean? Then, if that is the case how can it get a .nickname() method? Thanks for the guidance.

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  • android html download and parse error

    - by Brahadeesh
    I am trying to download the html file using the ul of the page. I am using Jsoup. This is my code: TextView ptext = (TextView) findViewById(R.id.pagetext); Document doc = null; try { doc = (Document) Jsoup.connect(mNewLinkUrl).get(); } catch (IOException e) { Log.d(TAG, e.toString()); e.printStackTrace(); } NodeList nl = doc.getElementsByTagName("meta"); Element meta = (Element) nl.item(0); String title = meta.attr("title"); ptext.append("\n" + mNewLinkUrl); When running it, I am getting an error saying attr is not defined for the type element. What have I done wrong? Pardon me if this seems trivial.

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  • Google Chart Number formatting

    - by MizAkita
    I need to format my pie and column charts to show the $ and comma in currency format ($###,###) when you hover over the charts. Right now, it is displaying the number and percentage but the number as #####.## here is my code. Any help would be appreciated. // Load the Visualization API and the piechart package. google.load('visualization', '1.0', {'packages':['corechart']}); // Set a callback to run when the Google Visualization API is loaded. google.setOnLoadCallback(drawChart); var formatter = new google.visualization.NumberFormat({ prefix: '$' }); formatter.format(data, 1); var options = { pieSliceText: 'value' }; // Callback that creates and populates a data table, // instantiates the pie chart, passes in the data and // draws it. function drawChart() { // REVENUE CHART - Create the data table. var data4 = new google.visualization.DataTable(); data4.addColumn('string', 'Status'); data4.addColumn('number', 'In Thousands'); data4.addRows([ ['Net tution & Fees', 213.818], ['Auxiliaries', 30.577], ['Government grants/contracts', 39.436], ['Private grants/gifts', 39.436], ['Investments', 10.083], ['Clinics', 14.353], ['Other', 5.337] ]); // EXPENSES CHART - Create the data table. var data5 = new google.visualization.DataTable(); data5.addColumn('string', 'Status'); data5.addColumn('number', 'Amount'); data5.addRows([ ['Instruction', 133.868], ['Sponsored Progams', 34.940], ['Auxiliaries', 30.064], ['Academic Support', 25.529], ['Depreciation & amortization', 18.548], ['Student Services', 22.626], ['Plant operations & maintenance', 18.105], ['Fundraising', 13.258], ['Geneal Administration', 11.628], ['Interest', 6.846], ['Student Aid', 1.886], ]); // ENDOWMENT CHART - Create the data table. var data6 = new google.visualization.DataTable(); data6.addColumn('string', 'Status'); data6.addColumn('number', 'In Millions'); data6.addRows([ ['2010', 178.7], ['2011', 211.693], ['2012', 199.3] ]); // Set REVENUE chart options var options4 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':550, 'height':250}; // Set EXPENSES chart options var options5 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':550, 'height':250}; // Set ENDOWMENT chart options var options6 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':450, 'height':250}; // Instantiate and draw our chart, passing in some options. var chart4 = new google.visualization.PieChart(document.getElementById('chart_div4')); chart4.draw(data4, options4); var chart5 = new google.visualization.PieChart(document.getElementById('chart_div5')); chart5.draw(data5, options5); var chart6 = new google.visualization.ColumnChart(document.getElementById('chart_div6')); chart6.draw(data6, options6);}

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  • How to reset lstset settings for listings?

    - by drittesbinom
    At the top of my tex document, I set my sourcecode listing format by \lstset{language=java} \lstset{numbers=left, numberstyle=\tiny, numbersep=5pt, breaklines=true} \lstset{emph={square}, emphstyle=\color{red}, emph={[2]root,base}, emphstyle={[2]\color{blue}}} because I merely list Java source code. At one point in my document, I had to reformat for a single listing by \lstset{commentstyle=\footnotesize\textit} \lstset{basicstyle=\ttfamily\fontsize{11}{12}\selectfont} \lstset{literate= {!=} {$\neq$}{2}} Now I have the problem that my previous Java formatting for listings is destroyed, and I dont know how to reset the lst settings to default. How can this be avoided?

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  • How to properly catch a 404 error in .NET

    - by Luke101
    I would like to know the proper way to catch a 404 error with c# asp.net here is the code I'm using HttpWebRequest request = (HttpWebRequest) WebRequest.Create(String.Format("http://www.gravatar.com/avatar/{0}?d=404", hashe)); // execute the request try { //TODO: test for good connectivity first //So it will not update the whole database with bad avatars HttpWebResponse response = (HttpWebResponse)request.GetResponse(); Response.Write("has avatar"); } catch (Exception ex) { if (ex.ToString().Contains("404")) { Response.Write("No avatar"); } } This code works but I just would like to know if this is the most efficient.

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  • SQL Server, Generate scripts, unencrypted stored procedures only

    - by PeterO
    I have a SQL Server database with 3195 stored procedures. Most (approx 90%) of the stored procedures are encrypted (it's a 3rd party app) but there are many that are not encrypted (added by consultants later). I need to get an overview of the unencrypted stored procedures created by consultants and then apply fixes so that they can work with UTC time. I use Generate Scripts and select only stored procedures but that fails. I assume that is because the first stored procedure that it tries to write out is encrypted. Is there a way to write out the approx 300 stored procedures that are not encrypted?

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  • java methods and race condition in a jsp/servlets application.

    - by A.S al-shammari
    Hi. Suppose that I have a method called doSomething() and I want to use this method in a multithreaded application (each servlet inherits from HttpServlet).I'm wondering if it is possible that a race condition will occur in the following cases: doSomething() is not staic method and it writes values to a database. doSomething() is static method but it does not write values to a database. what I have noticed that many methods in my application may lead to a race condition or dirty read/write. for example , I have a Poll System , and for each voting operation, a certain method will change a single cell value for that poll as the following: [poll_id | poll_data ] [1 | {choice_1 : 10, choice_2 : 20}] will the JSP/Servlets app solve these issues by itself, or I have to solve all that by myself? Thanks..

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  • How to rotate table-headline in Latex table

    - by pagid
    Hi, is there a way to rotate the "Demo 1", "Demo2" and "Demo 3" headlines 90° in the following LaText table? \documentclass[a4paper,twoside,10pt]{report} \begin{document} \begin{tabular}{|l|l|l|l|} \hline & Demo1 & Demo2 & Demo3 \\ \hline Person 1 & x & & \\ \hline Person 2 & x & & x \\ \hline Person 3 & x & x & \\ \hline Person 4 & & x & x \\ \hline \end{tabular} \end{document} Thanks

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