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  • ASP.NET - Update progress while processing data

    - by Danny
    Hope I can explain this correctly. I have a process, that outputs step by step messages (i.e., Processing item 1... Error in item 2 etc etc). I want this to be outputted to the user during the process, and not at the end. I pretty sure i need to do this with threading, but can't find a decent example. Thanks in advanced.

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  • Why One-to-one relationship dosen't work?

    - by eugenn
    I'm trying to create a very simple relationship between two objects. Can anybody explain me why I can't find the Company object via findBy method? class Company { String name String desc City city static constraints = { city(unique: true) } } class City { String name static constraints = { } } class BootStrap { def init = { servletContext -> new City(name: 'Tokyo').save() new City(name: 'New York').save() new Company(name: 'company', city: City.findByName('New York')).save() def c = Company.findByName('company') // Why c=null????! } def destroy = { } }

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  • Meaning of message "operations coalesced during safepoint"

    - by elec
    A java app runs with the following flag: -XX:+PrintSafepointStatistics, and then produces the following line on the standard output console: 2 VM operations coalesced during safepoint Anyone cares to explain what this mean ? More generally - is there a Java reference manual somewhere detailling all JVM flags, their use and, most importantly, the expected output, with relevant explanations ?

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  • Java: JButton actionListener explantation

    - by MrDoctorProfessorTyler
    I am extremely confused as to how a JButton works. I have read over the oracle documents of the JButton, but I have failed to see how a JButton can have an actionlistener added to it. I have really always wondered how things like JFrames and all that can have things like .addMouseListener and all that. Can anyone explain how a JButton can have an actionListener added to it like the .addActionListener(...) syntax?

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  • What is mod_php...?

    - by SpikETidE
    Hi everybody... First of all, Pardon this complete n00b question... While going through the zend tutorial here i came across the following statement... Note that the php_flag settings in .htaccess only work if you are using mod_php. Can someone explain what that means...??? Thanks and Regards....

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  • How many of you have gone from MySQL to Postgresql? Was it worth it?

    - by trustfundbaby
    I'm thinking about moving from MySQL to Postgres for Rails development and I just want to hear what other developers that made the move have to say about it. I'm looking for personal experiences, not a Mysql v Postgres shootout, just the pros and cons that you yourself have arrived at. Stuff that folks might not necessarily think. Feel free to explain why you moved in the first place as well.

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  • post and pre increment in c

    - by jammkie same
    void main() { int a=2 , c; c=a++ + ++a + ++a + ++a; printf("%d",c); } prints 20, whereas void main() { int a=2; int c=a++ + ++a + ++a + ++a; printf("%d",c); } prints 17. Can someone explain the reason for this.

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  • Classes. Whats the point?

    - by Ben Shelock
    I'm fairly new to OOP in PHP, I've made a couple of basic scripts but nothing impressive. All I've really taken from it is that it would probably be easier just make a collection of functions and include them. The structure of classes seems to just confuse what was otherwise a simple process. And in collating everything into a class it doesn't really add any functionality. So I'm clearly missing something. Could someone explain what functionality is added by creating classes

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  • How do "and" and "or" work when combined in one statement?

    - by orokusaki
    For some reason this function confused me: def protocol(port): return port == "443" and "https://" or "http://" Can somebody explain the order of what's happening behind the scenes to make this work the way it does. I understood it as this until I tried it: Either A) def protocol(port): if port == "443": if bool("https://"): return True elif bool("http://"): return True return False Or B) def protocol(port): if port == "443": return True + "https://" else: return True + "http://" Is this some sort of special case in Python, or am I completely misunderstanding how statements work?

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  • How to get the Drive Letter for the DevicePath

    - by new
    Dear All, I am using Win32 API. Really i do not understand how to get the drive letter for DevicePath of a USB stick . can you pls explain it to me ( what i have is SP_DEVICE_INTERFACE_DETAIL_DATA DevicePath using this Device path i get VID AND PID of the usb device my device path looks like below "\?\usb#vid_1a8d&pid_1000#358094020874450#{a5dcbf10-6530-11d2-901f-00c04fb951ed}" Is there any way to to map DRIVE LETTER to my DEVICE PATH so please help me to map drive letter to DevicePath ) Thanks for any help.

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  • xna manual animation

    - by tasyjean
    i want to animate 3d model in xna programmatically ,i tried to transform bones but nothing to happen only the whole model transform not individual bones as i want i read the 3d model by basic model processor so how i do this ? and is there any need to extended model processor like skinnedModelSample please explain the steps

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  • how to use base64binary in php

    - by praveenjayapal
    Hi friends, I have accessed the following http://www.webservicex.net/genericbarcode.asmx luckly i got the result too,but the result in the format of base64binary. i dont know how to parse the result if any one knows and Please explain me how to use the base64binary and convert the encoded format into the image. Thanks,Praveen J

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  • Difference between GIT and CVS

    - by jay
    What is the difference between git and cvs version control systems? I have been happily using CVS for over 10 years and have been told that GIT is much better. Could someone please explain what the difference between the two is and why one is better than the other?

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  • Object or primitive type

    - by John
    Hi, Can someone explain to me the usage of Integer, Boolean etc in place of their primitive types in JAVA? I can't seem to grasp the advantages their are providing. They seem to create unnecessary problems of handling null values. Thanks!

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  • Having trouble understanding some code (Ruby on Rails)

    - by user284194
    I posted a question awhile ago asking how I could limit the rate at which a form could be submitted from a rails application. I was helped by a very patient user and their solution works great. The code was for my comments controller, and now I find myself wanting to add this functionality to another controller, my Messages controller. I immediately tried reusing the working code from the comments controller but I couldn't get it to work. Instead of asking for the working code, could someone please help me understand my working comment controller code? class CommentsController < ApplicationController #... before_filter :post_check def record_post_time cookies[:last_post_at] = Time.now.to_i end def last_post_time Time.at((cookies[:last_post_at].to_i rescue 0)) end MIN_POST_TIME = 2.minutes def post_check return true if (Time.now - last_post_time) > MIN_POST_TIME flash[:warning] = "You are trying to reply too fast." @message = Message.find(params[:message_id]) redirect_to(@message) return false end #... def create @message = Message.find(params[:message_id]) @comment = @message.comments.build(params[:comment]) if @comment.save record_post_time flash[:notice] = "Replied to \"#{@message.title}\"" redirect_to(@message) else render :action => "new" end end def update @message = Message.find(params[:message_id]) @comment = Comment.find(params[:id]) if @comment.update_attributes(params[:comment]) record_post_time redirect_to post_comment_url(@message, @comment) else render :action => "edit" end end #... end My Messages controller is pretty much a standard rails generated controller with a few before filters and associated private methods for DRYing up the code and a redirect for non existent pages. I'll explain how much of the code I understand. When a comment is created, a cookie is created with a last_post_time value. If they try to post another comment, the cookie is checked if the last one was made in the last two minutes. If it was a flash warning is displayed and no comment is recorded. What I don't really understand is how the post_check method works and how I can adapt it for my simpler posts controller. I thought I could reuse all the code in the message controller with the exception of the line: @message = Message.find(params[:message_id]) # (don't need the redirect code) in the post_check method. But it trips up on the "record_post_time" in the create action/method. I really want to understand this. Can someone explain why this doesn't work? I greatly appreciate you reading my lengthy question.

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  • how to get a value which points to a function

    - by darkandcold
    hi, i have a value like that var myvalue=myfunction(1,2); what I need is that GETTING myfunction(a,b) as a string.. I mean not "myfunction's value" hmmm, let me explain, myfunction(1,2) returns 1+2=3 if I type alert(myvalue) it returns 3 but I need myfunction(a,b) AS IT'S TYPED when I use alert. NOT IT'S VALUE think it like var myvalue='myfunction(a,b)' now, if i use Alert, it gives me myfunction(a,b) how can I do that?

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  • why copy and paste codes is dangerous

    - by Yigang Wu
    sometimes, my boss will complain us why we need so long time to implement a feature, actually, the feature has been implemented in other AP before, you just need to copy and paste codes from there. The cost should be low. It's really a hard question, because copy and paste codes is not a easy thing from my point. Do you have any good reason to explain your boss who doesn't know technology?

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  • what should be the return type of the hashCode()

    - by subhashis
    The signature of the hashCode() method is public int hashCode(){ return x; } in this case x must be an int(primitive) but plz can anyone explain it to me that the number which the hashCode() returns must be a prime number, even number...etc or there is no specification ? the reason behind i am asking this question is i have seen it in different ids the auto generated code always returns a prime number, so i need to know why? thanks in advance

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