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  • Sync Algorithms

    - by Kristopher Johnson
    Are there any good references out there for sync algorithms? I'm interested in algorithms that synchronize the following kinds of data between multiple users: calendars documents lists and outlines I'm not just looking for synchronization of contents of directories a la rsync; I am interested in merging the data within individual files.

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  • Connection Limit in Adobe AIR?

    - by Brinias
    I have an Adobe AIR application that makes multiple connections to a server. When I open more than two connections I get an error: 2032: Stream Error. Is there a configuration option or a property somewhere to raise the limit?

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  • Is Abstract Factory Pattern implemented correctly for given scenario.... ???

    - by Amit
    First thing... I am novice to pattern world, so correct me if wrong anywhere Scenario: There are multiple companies providing multiple products of diff size so there are 3 entities i.e. Companies, Their Product and size of product I have implement Abstract Pattern on this i.e. so that I will create instance of IProductFactory interface to get desired product... Is below implementation of Abstract Factory Pattern correct ??? If not then please correct the approach + Also tell me if any other pattern can be used for such scenario Thanks in advance... public enum Companies { Samsung = 0, LG = 1, Philips = 2, Sony = 3 } public enum Product { PlasmaTv = 0, DVD = 1 } public enum ProductSize { FortyTwoInch, FiftyFiveInch } interface IProductFactory { IPhilips GetPhilipsProduct(); ISony GetSonyProduct(); } interface ISony { string CreateProducts(Product product, ProductSize size); } interface IPhilips { string CreateProducts(Product product, ProductSize size); } class ProductFactory : IProductFactory { public IPhilips GetPhilipsProduct() { return new Philips(); } public ISony GetSonyProduct() { return new Sony(); } } class Philips : IPhilips { #region IPhilips Members public string CreateProducts(Product product, ProductSize size) {// I have ingnore size for now.... string output = string.Empty; if (product == Product.PlasmaTv) { output = "Plasma TV Created !!!"; } else if (product == Product.DVD) { output = "DVD Created !!!"; } return output; } #endregion } class Sony : ISony {// I have ingnore size for now.... #region ISony Members public string CreateProducts(Product product, ProductSize size) { string output = string.Empty; if (product == Product.PlasmaTv) { output = "Plasma TV Created !!!"; } else if (product == Product.DVD) { output = "DVD Created !!!"; } return output; } #endregion } IProductFactory prodFactory = new ProductFactory(); IPhilips philipsObj = prodFactory.GetPhilipsProduct(); MessageBox.Show(philipsObj.CreateProducts(Product.DVD, ProductSize.FortyTwoInch)); or //ISony sonyObj = prodFactory.GetSonyProduct(); //MessageBox.Show(sonyObj.CreateProducts(Product.DVD, ProductSize.FortyTwoInch));

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  • Patterns: Local Singleton vs. Global Singleton?

    - by Mike Rosenblum
    There is a pattern that I use from time to time, but I'm not quite sure what it is called. I was hoping that the SO community could help me out. The pattern is pretty simple, and consists of two parts: A singleton factory, which creates objects based on the arguments passed to the factory method. Objects created by the factory. So far this is just a standard "singleton" pattern or "factory pattern". The issue that I'm asking about, however, is that the singleton factory in this case maintains a set of references to every object that it ever creates, held within a dictionary. These references can sometimes be strong references and sometimes weak references, but it can always reference any object that it has ever created. When receiving a request for a "new" object, the factory first searches the dictionary to see if an object with the required arguments already exits. If it does, it returns that object, if not, it returns a new object and also stores a reference to the new object within the dictionary. This pattern prevents having duplicative objects representing the same underlying "thing". This is useful where the created objects are relatively expensive. It can also be useful where these objects perform event handling or messaging - having one object per item being represented can prevent multiple messages/events for a single underlying source. There are probably other reasons to use this pattern, but this is where I've found this useful. My question is: what to call this? In a sense, each object is a singleton, at least with respect to the data it contains. Each is unique. But there are multiple instances of this class, however, so it's not at all a true singleton. In my own personal terminology, I tend to call the factory method a "global singleton". I then call the created objects "local singletons". I sometimes also say that the created objects have "reference equality", meaning that if two variables reference the same data (the same underlying item) then the reference they each hold must be to the same exact object, hence "reference equality". But these are my own invented terms, and I am not sure that they are good ones. Is there standard terminology for this concept? And if not, could some naming suggestions be made? Thanks in advance...

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  • php imap save massage to sent folder after sending

    - by user1108279
    I am stucked with this for two days. I am trying to use imap_append from PHP but no luck so far. I was able to to implement this code for single attachment but multiple attachments not working. <?php $authhost="{000.000.000.000:993/validate-cert/ssl}Sent"; $user="sadasd"; $pass="sadasd"; if ($mbox=imap_open( $authhost, $user, $pass)) { $dmy=date("d-M-Y H:i:s"); $filename="filename.pdf"; $attachment = chunk_split(base64_encode($filestring)); $boundary = "------=".md5(uniqid(rand())); $msg = ("From: Somebody\r\n" . "To: [email protected]\r\n" . "Date: $dmy\r\n" . "Subject: This is the subject\r\n" . "MIME-Version: 1.0\r\n" . "Content-Type: multipart/mixed; boundary=\"$boundary\"\r\n" . "\r\n\r\n" . "--$boundary\r\n" . "Content-Type: text/html;\r\n\tcharset=\"ISO-8859-1\"\r\n" . "Content-Transfer-Encoding: 8bit \r\n" . "\r\n\r\n" . "Hello this is a test\r\n" . "\r\n\r\n" . "--$boundary\r\n" . "Content-Transfer-Encoding: base64\r\n" . "Content-Disposition: attachment; filename=\"$filename\"\r\n" . "\r\n" . $attachment . "\r\n" . "\r\n\r\n\r\n" . "--$boundary--\r\n\r\n"); imap_append($mbox,$authhost,$msg); imap_close($mbox); } else { echo "<h1>FAIL!</h1>\n"; } ?> Now that raw code above is working but I am unable to add multiple attachments. In some cases I got message body base64 decoded and in message body lot of strange letters. Something like R0lGODlhkAEfAOYAAPSeZPONtdSIu+u2vv/La+5Rj8AhYPvWhOjtkfvi7MRImcjYse5DM6O+dOnl ..... I search all the web i still got no luck. Since I have dedicated server I also tried to implement some procmail+ postfix examples but also no luck. Can someone help?

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  • Easiest way to split up a large controller file

    - by timpone
    I have a rails controller file that is too large (~900 lines - api_controller). I'd like to just split it up like something like this: api_controller.rb api_controller_item_admin.rb api_controller_web.rb I don't want to split into multiple controllers. What would be the preferred way to do this? Could I just require the new parts at the end? like: require './api_controller_item_admin' require './api_controller_web'

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  • errors when trying to delete a key in the registry

    - by NightsEVil
    i'm trying to delete a registry from the Local_Machine\Software in the registry i made a key titles "DeleteMe" as a test to try it out but i cant get it to work iv tried multiple options and they all say that the "subkey" "subkeytree" and "value" do not exist BUT IT DOES! and i hope i'm using the right terminology here to its HKEY_LOCAL_MACHINE\SOFTWARE\DeleteMe i want it and all the sub keys/values deleted.. (i hope key is the right terminology they look just like folders but when right clicked on they have the option "copy key name")

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  • Splitting tables by field to optimize MySQL?

    - by AK
    Do splitting fields into multiple tables ever yield faster queries? Consider the following two scenarios: Table1 ----------- int PersonID text Value1 float Value2 or Table1 ----------- int PersonID text Value1 Table2 ----------- int PersonID float Value2 If Value1 and Value2 are always being displayed together, I imagine Table1 is always faster because the second schema would require two SELECT statements. But are there any situations where you would choose the second? If the number of records were expected to be really large?

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  • Efficient way to store tuples in the datastore

    - by Drew Sears
    If I have a pair of floats, is it any more efficient (computationally or storage-wise) to store them as a GeoPtProperty than it would be pickle the tuple and store it as a BlobProperty? If GeoPt is doing something more clever to keep multiple values in a single property, can it be leveraged for arbitrary data? Can I store the tuple ("Johnny", 5) in a single entity property in a similarly efficient manner?

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  • Which design pattern should be used to create an emulator?

    - by Facon
    I have programmed an emulator, but I have some doubts about how to organizate it properly, because, I see that it has some problems about classes connection (CPU <- Machine Board). For example: I/O ports, interruptions, communication between two or more CPU, etc. I need for the emulator to has the best performance and good understanding of the code. PD: Sorry for my bad English. EDITED - Asking for multiple patterns.

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  • How to get named excel sheets while exporting from SSRS

    - by rao
    Whenever a single page report is exported to excel, sheet in excel is named by the report name. If a report has multiple pages, the sheets are named as sheet1, sheet2,.... Is there any way to specify sheet names in SSRS 2005 ? solution: Found this after some googleing: Changing the Sheet names in SQL Server RS Excel: QnD XSLT Will try out and post an update if it works.

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  • Python equivalent of C++ getline()

    - by Arnab Sen Gupta
    In C++ we can enter multiple lines by giving our own choice of delimiting character in the getline() function.. however I am not able to do the same in Python!! it has only raw_input() and sys.stdin.readline() methods that read till I press enter. Is there any way to customize this so that I can specify my own delimiter?

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  • How to avoid keyboard hide & show when focus changes from UITextField and UIWebView?

    - by Manoj
    I have a requirement in which the view contains one native UITextField and one UIWebView. The issue is if I switch the focus from UITextView to UIWebView, the keyboard window flicker(hides and then shows). ie, I got UIKeyboardWillHideNotification and UIKeyboardDidShowNotification But, this is not happening when I switch the other way. ies, I got only UIKeyboardDidShowNotification Is there any way to avoid this flickering effect? Note: I also notices if I have multiple UITextField and UIWebView, this issue is not happening with the same type of views.

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  • More than one emacs terminal

    - by Mad Wombat
    I am getting more and more used to doing everything from inside emacs, but it seems that eshell, shell and term will only run one instance each. Is there a way to run multiple terminals (preferably term) inside emacs?

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  • Cross tabulation using C#

    - by user309010
    Hi All, I need to create a cross tab using datatable in C#. Something like this fucntionname(Array datarows,Array datacolumns) The function should return the cross tabed table, more parameters for missing values would be great The source datatable can have multiple columns ranging from 1 - N.

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  • How make decides to build target

    - by Michael
    One sign is that target does not exist, understand this. Another is by comparing modification timestamp of target and prerequisites. How it works in more details? What is the logic of comparing target and prerequisite timestamps and how it works when there are multiple prerequisites?

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  • C child read giving "resource temporarily unavailable"

    - by Gary
    So I have a file stream from a parent process to a child - and most of the time it works fine. However, when reading from it multiple times quickly, using fgets() will return NULL and the error is set to "resource temporarily unavailable". The problem is intermittent - and running the script that does the reads will sometimes have fgets return NULL and sometimes wont. Could anyone help me stop this error from happening? Thanks!

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  • Sliding finger UIImageView

    - by NextRev
    How do you detect when you slide your finger across a UIImageView? Say for example you slide your finger across it and it changes color or something. I want to be able to slide across multiple UIImageViews and have something happen...

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  • With MVVM, does each UI window have its own ViewModel?

    - by j0rd4n
    When I'm designing multiple views under the MVVM pattern, does each view get its own ViewModel or do they all share the same one? I understand that this is ultimately a flexible decision, but what is the best practice? My gut tells me to have a ViewModel for each view (i.e. each separate UI window). All of the blog examples of MVVM show a single view but not much beyond that.

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  • persistent view controller

    - by derrichh
    Im building an iphone radio application and I want to have the controls, play, pause, stop, etc. in a tool bar (a custom view controller) at the bottom of the application. I want to keep this there throughout all the views so you can control the audio while navigating through the other parts of the application (multiple view/table controllers). Is there a way to create a view that stays in place like a tab bar?

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  • Separate clauses of an if statement?

    - by tarnfeld
    Is there any way to have multiple clauses in an if() statement? For instance: if( ($username=='textUser' && $role=='admin') || ($admin=='yes')) { // If the username AND role are set to admin OR if the admin is set to 'yes' } else { // Neither clauses of the if statement are true } Perhaps this is actually the correct code, i have no tried it - but if not, could anyone tell me how? :)

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