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  • javax.activation.DataSource size question

    - by folone
    How do I get the amount of physical memory, consumed by the DataSource (specifically — ByteArrayDataSource)? I use ByteArrayDataSource (byte[] bytes, String type) constructor, where I get bytes like this: String str = "test"; byte[] bytes = str.getBytes(); Would that be str.length() in bytes? Any other ideas?

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  • Javscript REGEX

    - by Rabbott
    I need a javascript REGEX to check that the length of the string is 9 characters. Starts with 'A' or 'a' and is followed by 8 digits. Axxxxxxxx or axxxxxxxx

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  • Developing a high-performance, scalable Comet application

    - by Rob
    Well, the title says most of it. I'm looking to develop a chat application that will hopefully become something more, and currently I'm considering my options for what I should build it on top of. I've taken a look at Tornado with Redis as my primary option - Tornado, being a Comet server, is perfect for long polling to retrieve the messages on Redis, which I have the intention of using as both a persistent data store, as well as a message queue with its nifty subpub features. However, I've also heard good things about Django, RabbitMQ, MongoDB and Orbited. JavaScript isn't a big problem for me, so Orbited's JavaScript support isn't too much of a boon. Really, I'd probably be happy to develop on the route I've chosen for myself, but if there are any gaping deficiencies in my plan, I'd like some kind person to point them out before I find I've wasted months on this.

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  • Storing task state between multiple django processes

    - by user366148
    I am building a logging-bridge between rabbitmq messages and Django application to store background task state in the database for further investigation/review, also to make it possible to re-publish tasks via the Django admin interface. I guess it's nothing fancy, just a standard Producer-Consumer pattern. Web application publishes to message queue and inserts initial task state into the database Consumer, which is a separate python process, handles the message and updates the task state depending on task output The problem is, some tasks are missing in the db and therefore never executed. I suspect it's because Consumer receives the message earlier than db commit is performed. So basically, returning from Model.save() doesn't mean the transaction has ended and the whole communication breaks. Is there any way I could fix this? Maybe some kind of post_transaction signal I could use? Thank you in advance.

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  • What is the Best way to copy Folder using c#

    - by karthik
    I need to copy a Folder from one drive to a removable Hard disk. The Folder which needs to be copied will have many sub folders and files in it. The input will be Source Path and Target Path. Like.. Source Path : "C:\SourceFolder" Target Path : "E:\" After copying is done, i shud be able to see the folder "SourceFolder" in my E: drive. Thanks.

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  • jQuery object IE8

    - by Ojtwist
    So i'm trying to render a template with trimpath in IE8, but when passing the template (a jquery object) there is nothing in it. This all works in chrome,safari,firefox. So to give an example: var $flickrImageGalleryPreviewTemplate =$('#flickr_image_gallery_preview_template',rootel); $flickrImageGalleryPreviewTemplate.length) will result in 0 in IE8 and 1 in FF,Chrome,Safari

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  • Allocation of memory with LE routines

    - by HaWe
    At /questions/2000777/allocation-of-memory-in-variable-length-tables NealB mentioned LE routines to allocate/deallocate memory in a non-CICS COBOL program. I'd very much like to know how this is done: how the LE routine is called. (I'm familiar with the LINKAGE SECTION and with SET ADDRESS.) Since I have no access to an IBM mainframe at the moment - meaning no access to online documentation - some code snippets could enlighten me.

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  • GET request, iOS

    - by phnmnn
    I need to do this GET request: http://api.testmy.co.il/api/sync?BID=1049&ClientCode=3847&Discount=2.34&Service=0&Items=[{"Name":"Tax","Price":"2.11","Quantity":"1","SerialID":"1","Remarks":"","Toppings":""}]&Payments=[] In browser I get response: { "Success":true, "Atava":[], "Pending":[], "CallWaiter":false } But in iOS it not work. i try: NSString *requestedURL=[NSString stringWithFormat:@"http://api.testmy.co.il/api/sync?BID=%i&ClientCode=%i&Discount=2.34&Service=0&Items=[{\"Name\":\"Tax\",\"Price\":\"2.11\",\"Quantity\":\"1\",\"SerialID\":\"1\",\"Remarks\":\"\",\"Toppings\":\"\"}]&Payments=[]",BID,num]; NSURL *url = [NSURL URLWithString:requestedURL]; NSURLResponse *response; NSData *GETReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil]; NSString *theReply = [[NSString alloc] initWithBytes:[GETReply bytes] length:[GETReply length] encoding: NSASCIIStringEncoding]; NSLog(@"Reply: %@", theReply); OR NSString *requestedURL=[NSString stringWithFormat:@"http://api.testmy.co.il/api/sync?BID=%i&ClientCode=%i&Discount=2.34&Service=0&Items=[{'Name':'Tax','Price':'2.11','Quantity':'1','SerialID':'1','Remarks':'','Toppings':''}]&Payments=[]",BID,num]; OR NSMutableDictionary *params = [[NSMutableDictionary alloc] init]; [params setObject:@"Tax" forKey:@"Name"]; [params setObject:@"2.11" forKey:@"Price"]; [params setObject:@"1" forKey:@"Quantity"]; [params setObject:@"1" forKey:@"SerialID"]; [params setObject:@"" forKey:@"Remarks"]; [params setObject:@"" forKey:@"Toppings"]; NSData *jsonData = nil; NSString *jsonString = nil; if([NSJSONSerialization isValidJSONObject:params]) { jsonData = [NSJSONSerialization dataWithJSONObject:params options:0 error:nil]; jsonString = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding]; NSLog(@"%@",jsonString); } NSString *get=[NSString stringWithFormat: @"&Items=%@", jsonString]; NSData *getData = [get dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url]; [request setHTTPMethod:@"GET"]; [request setTimeoutInterval:8]; [request setHTTPBody:getData]; [request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"Content-Type"]; nothing doesn't work. How to fix it? Sorry for bad english.

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  • permutation of array

    - by davit-datuashvili
    for example i have array int a[]=new int[]{3,4,6,2,1}; I need list of all permutation such that if one is like this, {3,2,1,4,6}, others must not be the same i know that if length of array=n then there is n! possible combination please help me to write this algortihm what to do?

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  • NSURLSession has NSoperationqueue internally?

    - by JeffWood
    A)If NSURLSession runs task in background in iOS7,Has Apple integrated internally Queue in NSURLSession?How it works in secondary thread and also in App suspended Mode? B)What is the difference between NSURLSession and NSoperationqueue? C)If NSURLSession is the replacement of NSURLCOnnection, Can we integrate NSURLSession into NSOPerationqueue? D)Are both same? E)Can we do the same thing in NSURLSession as in NSoperationQueue? If NSURLSession is the relplacement of NSUrlconnection ,Which one is the best in all situations?What is the future of NSUrlconnection?

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  • Java MessageDigest result does not stay constant

    - by user344146
    I've got this function for encrypting passwords in Java, but somehow when I call MessageDigest, it returns a different result every time even though I call it with the same password. I wonder if I am initializing it wrong somehow. public String encrypt (String password) { MessageDigest md = MessageDigest.getInstance("SHA-1"); md.reset(); md.update(password.getBytes(Charset.forName("utf-8")),0,password.length()); String res = md.digest().toString(); }

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  • Exercise 7.9 in "How to Think Like a Computer Scientist (python)" measuring occurrences of a character in a string

    - by Abie
    The question is how to write a program that measures how many times a character appears in a string in a generalizable way in python. The code that I wrote: def countLetters(str, ch): count=0 index=0 for ch in str: if ch==str[index]: count=count+1 index=index+1 print count when I use this function, it measures the length of the string instead of how many times the character occurs in the string. What did I do wrong? What is the right way to write this code?

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  • new items on GRUB screen in ubuntu/linux

    - by artsince
    I regularly update my ubuntu (10.04), and new minor versions keep accumulating on the GRUB screen. Right now I have 5 different versions listed on the GRUB, even though I always select the latest version to work with. Am I supposed to do anything to get rid of the old version references? Do these old versions affect disk space/performance?

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  • Return the Largest Span in a given Array -Core Java and Arrays Question

    - by Deepak
    Hi Stack People, Merry Christmas and hope you are in great Spirits,I have a Question in Java-Arrays as shown below.Im stuck up with this struggling to get it rite. Consider the leftmost and righmost appearances of some value in an array. We'll say that the "span" is the number of elements between the two inclusive. A single value has a span of 1. Write a **Java Function** that returns the largest span found in the given array. **Example: maxSpan({1, 2, 1, 1, 3}) ? 4,answer is 4 coz MaxSpan between 1 to 1 is 4 maxSpan({1, 4, 2, 1, 4, 1, 4}) ? 6,answer is 6 coz MaxSpan between 4 to 4 is 6 maxSpan({1, 4, 2, 1, 4, 4, 4}) ? 6,answer is 6 coz Maxspan between 4 to 4 is 6 which is greater than MaxSpan between 1 and 1 which is 4,Hence 64 answer is 6. I have the code which is not working,it includes all the Spans for a given element,im unable to find the MaxSpan for a given element. Please help me out. Results of the above Program are as shown below Expected This Run maxSpan({1, 2, 1, 1, 3}) ? 4 5 X maxSpan({1, 4, 2, 1, 4, 1, 4}) ? 6 8 X maxSpan({1, 4, 2, 1, 4, 4, 4}) ? 6 9 X maxSpan({3, 3, 3}) ? 3 5 X maxSpan({3, 9, 3}) ? 3 3 OK maxSpan({3, 9, 9}) ? 2 3 X maxSpan({3, 9}) ? 1 1 OK maxSpan({3, 3}) ? 2 3 X maxSpan({}) ? 0 1 X maxSpan({1}) ? 1 1 OK ::Code:: public int maxSpan(int[] nums) { int count=1;//keep an intial count of maxspan=1 int maxspan=0;//initialize maxspan=0 for(int i=0;i<nums.length;i++){ for(int j=i+1;j<nums.length;j++){ if(nums[i] == nums[j]){ //check to see if "i" index contents == "j" index contents count++; //increment count maxspan=count; //make maxspan as your final count int number = nums[i]; //number=actual number for maxspan } } } return maxspan+1; //return maxspan }

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  • Rspec and Rails 3 - Problem Validating Nested Attribute Collection Size

    - by MunkiPhD
    When I create my Rspec tests, I keep getting a validation of false as opposed to true for the following tests. I've tried everything and the following is the measly code that I have now - so if it's waaaaay wrong, that's why. class Master < ActiveRecord::Base attr_accessible :name, :specific_size # Associations ---------------------- has_many :line_items accepts_nested_attributes_for :line_items, :allow_destroy => true, :reject_if => lambda { |a| a[:item_id].blank? } # Validations ----------------------- validates :name, :presence => true, :length => {:minimum => 3, :maximum => 30} validates :specific_size, :presence => true, :length => {:minimum => 4, :maximum => 30} validate :verify_items_count def verify_items_count if self.line_items.size < 2 errors.add(:base, "Not enough items to create a master") end end end And here it the items model: class LineItem < ActiveRecord::Base attr_accessible :specific_size, :other_item_type_id # Validations -------------------- validates :other_item_type_id, :presence => true validates :master_id, :presence => true validates :specific_size, :presence => true # Associations --------------------- belongs_to :other_item_type belongs_to :master end The RSpec Tests: before(:each) do @master_lines = [] @master_lines << LineItem.new(:other_item_type_id => 1, :master_id => 2, :specific_size => 1) @master_lines << LineItem.new(:other_item_type_id => 2, :master_id => 2, :specific_size => 1) @attr = {:name => "Some Master", :specific_size => "1 giga"} end it "should create a new instance given a valid name and specific size" do @master = Master.create(@attr) line_item_one = @master.line_items.build(:other_item_type_id => 1, :specific_size => 1) line_item_two = @master.line_items.build(:other_item_type_id => 2, :specific_size => 2) @master.line_items.size === 2 @master.should be_valid end it "should have at least two items to be valid" do master = Master.new(:name => "test name", :specific_size => "1 mega") master_item_one = LineItem.new(:other_item_type_id => 1, :specific_size => 2) master_item_two = LineItem.new(:other_item_type_id => 2, :specific_size => 1) master.line_items << master_item_one master.should_not be_valid master.line_items << master_item_two master.line_items.size.should === 2 master.should be_valid end I'm very new to Rspec and Rails - and I've been failing at this for the past couple of hours. Thanks for any help in advance.

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  • Cannot use ternary operator in LINQ query

    - by Nissan Fan
    I can't figure out why I get a Object reference not set to an instance of an object. error if I use a ternary operator in my LINQ query. var courses = from d in somesource orderby d.SourceName, d.SourceType select new { ID = d.InternalCode, Name = string.Format("{0} - {1}{2}", d.InternalCode, d.SourceName, (d.SourceType.Length > 0 ? ", " + d.SourceType : string.Empty)) }; Any thoughts?

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  • Problem getting size of Website Xcode

    - by Michael Amici
    When i try and compile I come up with a warning that reads initialization makes pointer from integer without a cast. No clue why. I am just trying to get the size of a website. #import "Lockerz_RedemptionViewController.h" @implementation Lockerz_RedemptionViewController -(IBAction)startLoop:(id) sender { NSData *dataNew = [NSData dataWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://www.google.com/"]]]; NSUInteger *len = [dataNew length]; //error is here NSLog(@"%@", len); }

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  • JS Error:Cannot call method of null

    - by Nadeem
    I have the following method in a js file in ASP.Net web project. This method is giving the error Cannot call method 'split' of null function loadUser_InfoCallBack(res) { var ret=res.value; var senderGUID = ret.split(';')[0]; var senderText = ret.split(';')[1]; if(senderGUID.Length>0) { $('hiddenSender.value')=senderGUID; $('hiddenText.value')=senderText; } } Can anybody suggest the reasons for this error..

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