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  • What's the performance penalty of using isKindOfClass in Objective C?

    - by durcicko
    I'm considering introducing: if ([myInstance isKindOfClass:[SomeClass class]]) { do something...} into a piece of code that gets called pretty often. Will I introduce a significant performance penalty? In Objective C, is there a quicker way of assessing whether a given object instance is of certain class type? For example, is the following quicker? (I realize the test is somewhat different) if (myInstance.class == [SomeClass class]) { do something else...}

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  • update/validate embedded forms before saving in symfony

    - by Stanislav Palatnik
    I would like to validate an embedded form field before it gets saved in the database. Currently it will save an empty value into the database if the form field is empty. I'm allowing empty fields, but I want nothing inserted if the form field is empty. Also quick question, how to alter field values before validating/saving an embedded form field? $this-form-getObject works in the action, but $this-embeddedForm-getObject says object not found

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  • Naming Suggestions For A Function Providing Chaining In A Different Way

    - by sid3k
    I've coded an experimental function which makes passed objects chainable by using high order functions. It's name is "chain" for now, and here is a usage example; chain("Hello World") (print) // evaluates print function by passing "Hello World" object. (console.log,"Optional","Parameters") (returnfrom) // returns "Hello World" It looks lispy but behaves very different since it's coded in a C based language, I don't know if there is a name for this idiom and I couldn't any name more suitable than "chain". Any ideas, suggestions?

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  • stats::reorder vs Hmisc::reorder

    - by learnr
    I am trying to get around the strange overlap of stats::reorder vs Hmisc::reorder. Without Hmisc loaded I get the result I want, i.e. an unordered factor: > with(InsectSprays, reorder(spray, count, median)) [1] A A A A A A A A A A A A B B B B B B B B B B B B C C C C C C C C C C C C D D [39] D D D D D D D D D D E E E E E E E E E E E E F F F F F F F F F F F F attr(,"scores") A B C D E F 14.0 16.5 1.5 5.0 3.0 15.0 Levels: C E D A F B Now after loading Hmisc the result is an ordered factor: > library(Hmisc) Loading required package: survival Loading required package: splines Attaching package: 'Hmisc' The following object(s) are masked from 'package:survival': untangle.specials The following object(s) are masked from 'package:base': format.pval, round.POSIXt, trunc.POSIXt, units > with(InsectSprays, reorder(spray, count, median)) [1] A A A A A A A A A A A A B B B B B B B B B B B B C C C C C C C C C C C C D D [39] D D D D D D D D D D E E E E E E E E E E E E F F F F F F F F F F F F Levels: C < E < D < A < F < B In calling stats::reorder directly, I now for some reason get an ordered factor. > with(InsectSprays, stats::reorder(spray, count, median)) [1] A A A A A A A A A A A A B B B B B B B B B B B B C C C C C C C C C C C C D D [39] D D D D D D D D D D E E E E E E E E E E E E F F F F F F F F F F F F Levels: C < E < D < A < F < B Specifying, that I would need an unordered factor results in an error suggesting that stats::reorder is not used? > with(InsectSprays, stats::reorder(spray, count, median, order = FALSE)) Error in FUN(X[[1L]], ...) : unused argument(s) (order = FALSE) So the question really is how do I get an unordered factor with Hmisc loaded?

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  • how to use @ in python..

    - by zjm1126
    this is my code: def a(): print 'sss' @a() def b(): print 'aaa' b() and the Traceback is: sss Traceback (most recent call last): File "D:\zjm_code\a.py", line 8, in <module> @a() TypeError: 'NoneType' object is not callable so how to use the '@' thanks

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  • Move from *this in an rvalue method?

    - by FredOverflow
    In C++0x, methods can be overloaded on whether or not the expression that denotes the object on which the method is called is an lvalue or an rvalue. If I return *this from a method called via an rvalue, do I need to explicitly move from *this or not? Foo Foo::method() && { return std::move(*this); // Is this move required or not? } Unfortunately, I can't simply test this on my compiler since g++ does not support this feature yet :(

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  • Reading annotation property in aspect

    - by Lukasz Koniecki
    How to read annotation property value in aspect? I want my Around advice to be executed for all joint points annotated with @Transactional(readonly=false). @Around("execution(* com.mycompany.services.*.*(..)) " + "&& @annotation(org.springframework.transaction.annotation.Transactional)") public Object myMethod(ProceedingJoinPoint pjp) throws Throwable { }

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  • What's the difference between reflow and repaint?

    - by Jon Raasch
    I'm a little unclear on the difference between reflow + repaint (if there's any difference at all) Seems like reflow might be shifting the position of various DOM elements, where repaint is just rendering a new object. E.g. reflow would occur when removing an element and repaint would occur when changing its color. Is this true?

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  • Sharepoint InputFormTextBox: cannot change text color

    - by Mina Samy
    Hi all I have a custom sharepoint aspx form that has an InputFormTextBox with RichText property set to true. In browser when I change the color of the text I receive a javascript error: Message: 'g_elemRTELastTextAreaConverted' is null or not an object Line: 2509 Char: 3 Code: 0 URI: http://myhost/_layouts/1033/form.js what can be the reason for this

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  • how can i write line by line in txt data?

    - by Phsika
    I try to write line by line data but. if i run my application. writng last text1 data in script.txt private void button1_Click(object sender, EventArgs e) { System.IO.TextWriter tw; tw = new StreamWriter("C:/Script.txt"); tw.WriteLine(textBox1.Text); tw.Close(); }

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  • Ajax In Firefox Plugin

    - by Jishnu
    Hi, Is there any way to send Ajax request to server from Firefox plugin? If yes how? If no, how do we have client server communication in Firefox plugin? I want to get some json data from server and manipulate dom object according to the client input. I am pretty beginner in plugin programming Regards, Jishnu

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  • Adding rows with linq trouble with reference table

    - by Laurence Burke
    I am adding a new address and I know the structure as AddressID = PK and all other entities are non nullable. Now on insert of a new row the addrID Pk is autogened and I am wondering if I would have to get that to create a new row in the referencing table EmployeeAddress or does that automatically get generated also. also I want to be able to repopulate the dropdownlist that lists the current employee's addresses with the newly created address. static uint _curEmpID; protected void btnAdd_Click(object sender, EventArgs e) { if (txtZip.Text != "" && txtAdd1.Text != "" && txtCity.Text != "") { TestDataClassDataContext dc = new TestDataClassDataContext(); Address addr = new Address() { AddressLine1 = txtAdd1.Text, AddressLine2 = txtAdd2.Text, City = txtCity.Text, PostalCode = txtZip.Text, StateProvinceID = Convert.ToInt32(ddlState.SelectedValue) }; dc.Addresses.InsertOnSubmit(addr); lblSuccess.Visible = true; lblErrMsg.Visible = false; dc.SubmitChanges(); // // TODO: insert new row in EmployeeAddress to reference CurEmp to newly created address // SetAddrList(); } else { lblErrMsg.Text = "Invalid Input"; lblErrMsg.Visible = true; } } protected void ddlAddList_SelectedIndexChanged(object sender, EventArgs e) { lblErrMsg.Visible = false; lblSuccess.Visible = false; TestDataClassDataContext dc = new TestDataClassDataContext(); dc.ObjectTrackingEnabled = false; if (ddlAddList.SelectedValue != "-1") { var addr = (from a in dc.Addresses where a.AddressID == Convert.ToInt32(ddlAddList.SelectedValue) select a).FirstOrDefault(); txtAdd1.Text = addr.AddressLine1; txtAdd2.Text = addr.AddressLine2; txtCity.Text = addr.City; txtZip.Text = addr.PostalCode; ddlState.SelectedValue = addr.StateProvinceID.ToString(); btnSubmit.Visible = true; btnAdd.Visible = false; } else { txtAdd1.Text = ""; txtAdd2.Text = ""; txtCity.Text = ""; txtZip.Text = ""; btnAdd.Visible = true; btnSubmit.Visible = false; } } protected void SetAddrList() { TestDataClassDataContext dc = new TestDataClassDataContext(); dc.ObjectTrackingEnabled = false; var addList = from addr in dc.Addresses from eaddr in dc.EmployeeAddresses where eaddr.EmployeeID == _curEmpID && addr.AddressID == eaddr.AddressID select new { AddValue = addr.AddressID, AddText = addr.AddressID, }; ddlAddList.DataSource = addList; ddlAddList.DataValueField = "AddValue"; ddlAddList.DataTextField = "AddText"; ddlAddList.DataBind(); ddlAddList.Items.Add(new ListItem("<Add Address>", "-1")); } OK I am hoping that I did not include too much code. I would really appreciate any other comments about I could otherwise improve this code in any other ways also.

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  • Android - Run in background - Service vs. standard java class

    - by Chris
    In Android, if I want to do some background work, what is the difference between Creating a Service to do the work, and having the Activity start the Service VS. Creating a standard java class to do the work, and having the Activity create an object of the class and invoke methods, to do the work in separate threads Thanks Chris

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  • Validate DataGridColumn cell's individually

    - by Joshua Fox
    How can I validate the cells in a DataGridColumn individually? The validation is configured per-row. For example FIELD VALUE TYPE age 13 Integer height 13x3 Integer registered true Boolean temperature 98.G6 Float In this case, of course 13x3 and 98.G6 would be invalid. Writing a Validator is no problem, and I can grab the TYPE from the data provider object, but now do I get individual access to the GUI cells so I can give the Validator a source which is an individual cell, set the errorString on an individual cell.

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  • What causes memory fragmentation in .NET

    - by Matt
    I am using Red Gates ANTS memory profiler to debug a memory leak. It keeps warning me that: Memory Fragmentation may be causing .NET to reserver too much free memory. or Memory Fragmentation is affecting the size of the largest object that can be allocated Because I have OCD, this problem must be resolved. What are some standard coding practices that help avoid memory fragmentation. Can you defragment it through some .NET methods? Would it even help?

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  • Flex: Failing gracefully on ReferenceError: Error #1056:

    - by Chin
    Hi I have a text field which I would like to bind to a dynamic object. <mx:TextInput id="ti4" text="{selectedObj['someProp']}" valueCommit="{selectedObj['someProp'] = ti4.text}" x="1011.5" y="835"/> If the property doesn't exist I get a reference error - Is there any way to fail a little more gracefully? Any ideas much appreciated.

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  • cannot open shared library during execution

    - by Sharat Chandra
    I compiled my program as follows. mpicc b_eff_io.c -o b_eff_io2 -I/scratch/irodero/papi/include -L/scratch/irodero/papi/src -lpapi -lm Howeever I got this error error while loading shared libraries: libpapi.so: cannot open shared object file: No such file or directory What shud I do ?

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  • Ruby/IRB self help

    - by mozillalives
    I'm new to Ruby - what tricks can I use to help me find documentation on a object I'm working with? Normally I just do a_var.class or a_var.methods and try to guess what I need or search the web for documentation. Are there other methods or modules that might help?

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  • How to store date into Mysql database with play framework in scala?

    - by Rahul Kulhari
    I am working with play framework with scala and what am i doing : login page to login into web app sign up page to register into web app after login i want to store all databases values to user what i want to do: when user register for web app then i want to store user values into database with current time and date but my form is giving error. error: List(FormError(dates,error.required,List())),None) controllers/Application.scala object Application extends Controller { val ta:Form[Keyword] = Form( mapping( "id" -> ignored(NotAssigned:Pk[Long]), "word" -> nonEmptyText, "blog" -> nonEmptyText, "cat" -> nonEmptyText, "score"-> of[Long], "summaryId"-> nonEmptyText, "dates" -> date("yyyy-MM-dd HH:mm:ss") )(Keyword.apply)(Keyword.unapply) ) def index = Action { Ok(html.index(ta)); } def newTask= Action { implicit request => ta.bindFromRequest.fold( errors => {println(errors) BadRequest(html.index(errors))}, keywo => { Keyword.create(keywo) Ok(views.html.data(Keyword.all())) } ) } models/keyword.scala case class Keyword(id: Pk[Long],word: String,blog: String,cat: String,score: Long, summaryId: String,dates: Date ) object Keyword { val keyw = { get[Pk[Long]]("keyword.id") ~ get[String]("keyword.word")~ get[String]("keyword.blog")~ get[String]("keyword.cat")~ get[Long]("keyword.score") ~ get[String]("keyword.summaryId")~ get[Date]("keyword.dates") map { case id~blog~cat~word~score~summaryId~dates => Keyword(id,word,blog,cat,score, summaryId,dates) } } def all(): List[Keyword] = DB.withConnection { implicit c => SQL("select * from keyword").as(Keyword.keyw *) } def create(key: Keyword){DB.withConnection{implicit c=> SQL("insert into keyword values({word},{blog}, {cat}, {score},{summaryId},{dates})").on('word-> key.word,'blog->key.blog, 'cat -> key.cat, 'score-> key.score, 'summaryId -> key.summaryId, 'dates->new Date()).executeUpdate } } views/index.scala.html @(taskForm: Form[Keyword]) @import helper._ @main("Todo list") { @form(routes.Application.newTask) { @inputText(taskForm("word")) @inputText(taskForm("blog")) @inputText(taskForm("cat")) @inputText(taskForm("score")) @inputText(taskForm("summaryId")) <input type="submit"> <a href="">Go Back</a> } } please give me some idea to store date into mysql databse and date is not a field of form

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  • How do I cause the controller buttons to display for an Apple Quicktime video embedded in Firefox?

    - by Doug Treadwell
    I am trying to embed a Quicktime video in Firefox, but when I do the controller buttons do not appear. I've tried both the old style embed tag and the new style object tags, but when I set the "controller" option to true there is no change in the appearance of the plugin. The video loads, but it is zoomed in on some portion of the video and there are no buttons to play, pause, etc.

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