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• Does MS Test provide a default value equals comparison?

  - by fearofawhackplanet

  I want to test for example int orderId = myRepository.SubmitOrder(orderA); orderB = myRepository.GetOrder(orderId); Assert.AreEqual(orderA, orderB); // fail Obviously I need a value comparison here, but I don't want to have to provide an overridden Equals implementation for all of my classes purely for the sake of testing (it wouldn't be of any use in the rest of the app). Is there a provided generic method that just checks every field using reflection? Or if not, it is possible to write my own?

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• Optimizing Smart Client Performance

  - by Burt

  I have a smart client (WPF) that makes calls to the server va services (WCF). The screen I am working on holds a list of objects that it loads when the constructor is called. I am able to add, edit and delete records in the list. Typically what I am doing is after every add or delete I am reloading the entire model from the service again, there are a number off reasons for this including the fact that the data may have changed on the server between calls. This approach has proved to be a big hit on perfomance because I am loading everything sending the list up and down the wire on Add and Edit. What other options are open to me, should I only be send the required information to the server and how would I go about not reloading all the data again ever time an add or delete is performed?

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• Odd nested dictionary behavior in python

  - by adept

  Im new two python and am trying to grow a dictionary of dictionaries. I have done this in php and perl but python is behaving very differently. Im sure it makes sense to those more familiar with python. Here is my code: colnames = ['name','dob','id']; tablehashcopy = {}; tablehashcopy = dict.fromkeys(colnames,{}); tablehashcopy['name']['hi'] = 0; print(tablehashcopy); Output: {'dob': {'hi': 0}, 'name': {'hi': 0}, 'id': {'hi': 0}} The problem arises from the 2nd to last statement(i put the print in for convenience). I expected to find that one element has been added to the 'name' dictionary with the key 'hi' and the value 0. But this key,value pair has been added to EVERY sub-dictionary. Why? I have tested this on my ubuntu machine in both python 2.6 and python 3.1 the behaviour is the same.

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• Real-time data on webpage with jQuery

  - by Steven Hepting

  I would like a webpage that constantly updates a graph with new data as it arrives. Regularly, all the data you have is passed to the page at the beginning of the request. However, I need the page to be able to update itself with fresh information every few seconds to redraw the graph. Background The webpage will be similar to this http://www.panic.com/blog/2010/03/the-panic-status-board/. The data coming in will temperature values to be graphed measured by an Arduino and saved to the Django database (this part is already complete). Update It sounds as though the solution is to use the jQuery.ajax() function ( http://api.jquery.com/jQuery.ajax/) with a function as the .complete callback that will schedule another request several seconds later to a URL that will return the data in JSON format. How can that method be scheduled? With the .delay() function?

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• Javascript: Do processing when user has stopped typing

  - by Midhat

  I have a text box on a web page, whose value I want to send to a XMLHttpRequest. Now I want the user to just type the value, without pressing a button. But If i just send the request int he keyboard events, it will fire every time a key is pressed. So basically I want something liek this function KeyUpEvent() { if (user is still typing) return; else do processing } It would be great if the solution could come from plain javascript or mootools. I dont want to use any other library.

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• Random number generation

  - by Chandan Shetty SP

  I am using below code to generate random numbers in range... int randomNumberWithinRange(int min,int max) { int snowSize = 0; do { snowSize = rand()%max; } while( snowSize < min || snowSize > max ); return snowSize; } for(int i = 0; i < 10 ; i++) NSlog("@"%d",\t", randomNumberWithinRange(1,100)); If I quit my application and restart, same set of numbers are generated. How to generate different set of random numbers for every launching.

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• Does the traditional use of the controller in MVC lead to a violation of the Single Responsibility P

  - by Byron Sommardahl

  Wikipedia describes the Single Responsibility Principle this way: The Single Responsibility Principle states that every object should have a single responsibility, and that responsibility should be entirely encapsulated by the class. All its services should be narrowly aligned with that responsibility. The traditional use of the controller in MVC seems to lead a programmer towards a violation of this principle. Take a simple guest book controller and view. The controller might have two methods/actions: 1) Index() and 2) Submit(). The Index() displays the form. The Submit() processes it. Do these two methods represent two distinct responsibilities? If so, how does Single Responsibility come in to play?

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• how can I retrieve an html document from a url from javascript?

  - by Matt

  Hi, I have a url and I want to retrieve the html dom generated when going to the url (all the code for the page) in a javascript variable. How can I do this? I'm guessing an html get or post? Can anyone give an example with jQuery? Every time I do a $.get or $.post like this: $.get("http://www.google.ca", function(result) { alert(result); alert($(result).html()); }); $.post("http://www.google.ca", function(result) { alert(result); alert($(result).html()); }, "xml"); the first alert in each call comes up blank and the second comes up as null. Any ideas? Thanks, Matt

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• PredicateBuilder "And" Method not working

  - by mikemurf22

  I have downloaded the predicate builder and am having a difficult time getting it to work with the entity framework. Here is my code: v_OrderDetail is the entity var context = new OrdersEntities(); Expression<Func<v_OrderDetail,bool>> whereClause = w => true; var predicate = PredicateBuilder.True<v_OrderDetail>(); predicate.And(w => w.Status == "Work"); var results = context.v_OrderDetail.AsExpandable().Where(predicate); When I look at the results I get back every order. The And predicate doesn't seem to take. When I look at the predicate.parameters.count it only shows 1. I'm not sure, but I would expect it to show 2 after I add the second one. Any help is greatly appreciated.

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• MySQL - How To Avoid Repair With Keycache?

  - by dvancouver

  I have had some experience with optimizing the my.cnf file but my database has around 4 million records (MyISAM). I am trying to restore from a mysqldump but every time I do I eventually get the dreaded "Repair With Keycache", that may take days. Is there anyway to get past this and let it roll as "Repair By Sorting"? I have 2GB RAM, Dual Cores, lots of extra hard-drive space. Snip out of my.cnf: set-variable = max_connections=650 set-variable = key_buffer=256M set-variable = myisam_sort_buffer_size=64M set-variable = join_buffer=1M set-variable = record_buffer=1M set-variable = sort_buffer_size=2M set-variable = read_buffer_size=2M set-variable = query_cache_size=32M set-variable = table_cache=1024 set-variable = thread_cache_size=256 set-variable = wait_timeout=7200 set-variable = connect_timeout=10 set-variable = max_allowed_packet=16M set-variable = max_connect_errors=10 set-variable = thread_concurrency=8

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• How do I tell eclipse to auto-generate or retain stubs when it starts and does a clean build?

  - by Erick Robertson

  I'm working on a Java application that uses JavaSpace. We're developing this in Eclipse. There are a couple instances where we are inserting code into the JavaSpace to do some more advanced space notification logic. Doing this requires that we generate stubs for the classes used within the JavaSpace. We use an external script to generate these stubs. The problem is that whenever Eclipse restarts, it does a clean build of the whole application. When it does this, it deletes all the stubs and we have to regenerate them. I would like to find a way to either tell Eclipse not to remove the _stub.class and _skel.class files within the bin folder where the .class files are placed. Either that, or somehow teach Eclipse to generate the stub files whenever it does a rebuild (and I suppose whenever the source files from which the stubs are generated changes). How can I do one of these, so that we don't have to manually build the stubs every time we start up Eclipse?

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• Memory leak - debugger and memory analyzer disagreeing

  - by Joe

  There is a memory leak in my android game - I've managed to narrow it down to a certain object, which has a list of objects to render on a texture. This object clears the list every time it draws though - so I can't work out how its managed to get thousands of elements in the list. I checked in the debugger and it doesn't have all these thousands of elements - usually about 2-20 which is what I'd expect... The game definitely slows down progressively only if I have rendering to texturing on. Here is a picture of Memory Analyzer showing 6,111 items: Memory Analyzer Here is a picture of the debugger showing 2: Debugger Can anyone help me find out whats wrong?

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• What happens with TCP packets between two Socket.BeginReceive calls?

  - by Rodrigo

  I have a doubt about socket programming. I am developing a TCP packet sniffer. I am using Socket.BeginAccept, Socket.BeginReceive to capture every packet, but when a packet is received I have to process something. It is a fast operation, but would take some milliseconds, and then call BeginReceive again. My question is, what would happen if some packets are sent while I am processing, and haven't called BeginReceive? Are packets lost, or are they buffered internally? Is there a limit?

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• asp:Menu Not working on webhost

  - by Brian

  I'm using Visual Studio Web Express 2008 to develop an ASP.Net website. I have a master page that every page inherits from and on that master page I have the asp:menu control. On my local machine the menu control works just fine. The javascript is emitted and the links work as well. However, when I upload it to my webhost service provider, the javascript is not emitted and my links do not work. I'm getting a feeling that my service provider really doesn't know much about .Net as they suggested that I make sure that I upload the .js files which isn't necessary. Does anyone have any suggestions that I can give them? They're asking me what requirements are needed. It seems to me that something is not setup on their server properly but according to them, they have .Net 3.5 SP1 installed.

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• Check to see if file transfer is complete

  - by Cymon

  We have a daily job that processes files delivered from an external source. The process usually runs fine without any issues but every once in a while we have an issue of attempting to process a file that is not completely transferred. The external source SCPs these files from a UNIX server to our Windows server. From there we try to process the files. Is there a way to check to see if a file is still being transferred? Does UNIX put a lock on a file while SCPing it that we could check on the Windows side?

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• Information Label

  - by caisenm

  I am trying to make an information label that should display the events the application doing. deleting data, reading data, writing data, connection to db. etc.. I've added a label to my form and I am changing its text property for each operation like: label1.Text = "stored procedure is being executed.."; But, in the run time the text of the label does not change. I've tried to add the method Application.DoEvents(); to every place I've changed the label's text property. It works fine. But it looks silly. So I've tried to add this method to my label's "TextChanged" event. But it does not work! Am I doing something wrong? Or, is there any efficient way to make an information label?

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• javascript ajax variable question..

  - by Kelso

  Hey there, new to AJAX, JS.. Im trying to add to a Javascript/Ajax search script that I've put together. Previously, it had a single search field, called search_word, I added one called search_date. $(".search_button").click(function() { var search_word = $("#search_box").val(); var search_date = $("#datepicker").val(); var dataString = 'search_word='+ search_word; if(search_word=='') { } else { $.ajax({ type: "GET", url: "searchdata.php", data: dataString, In the Ajax, it appears to pass data of dataString, to my processing script. How do I add search date to the dataString so that I can use that var in my searchdata.php? In searchdata, I can do this $search_word=$_GET['search_word']; and use that var, but so far every time i attempt to alter the dataString, it breaks all the other functionality. Thanks!

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• visual studio 2005 is deleting the .svn folder in the bin\Debug directory - how to prevent this?

  - by M K Saravanan

  For some reason I need to check in a couple of files in the bin\Debug directory. For the past few weeks, I am noticing a strange behaviour from VS2005. Every time I recompile the code, it is deleting the .svn folder in the bin\Debug directory and hence svn is showing "obstructed" error. Even svn clean up doesn't help due to missing .svn folder. Is there any settings on VS2005 to prevent this? In the first place, why it is deleting .svn folder? This thread http://svn.haxx.se/tsvnusers/archive-2008-10/0019.shtml discuss about it but no useful solution to prevent this from happening. Any other suggestions?

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• Birt Global Integer

  - by matschie

  Hi there I have a Birt Report which read some stuff from a database. After that i want to increment a global Integer for every Detailrow that is loaded. So far i have initialized a global Integer with the following lines: importPackage(Packages.java.lang); reportContext.setPersistentGlobalVariable("minTotalPlus", new Integer(0)); After that i added the following line into a field in my detail row: reportContext.setGlobalVariable("minTotalPlus", new Integer reportContext.getGlobalVariable("minTotalPlus")) + 1); When i preview the report i get an "java.lang.NumberFormatException: null" which means that the global variable is null. Why is that so? How could I fix that?

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• Invoking browser on streaming media URLs

  - by Maven

  I have a dirt simple little function that launches the blackberry browser on a streaming media file in order to launch the built in media player. Everything works fine but there is this annoying dialog every time from the browser asking me if I want to save or open the file. My answer is always "open" the file so is there a way I can make it default and not bring up the dialog each time? The code I'm using to launch the browser // Get the default sessionBrowserSession browserSession = Browser.getDefaultSession(); // now launch the URL browserSession.displayPage(url); This is on blackberry OS 5.0 Thanks!

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• Making a vertically scrolling parent div which does not cause overflow of children

  - by marq

  I have something as follows: <div style="float: left; height: 20px; overflow-y: scroll"> <div>hello this is a test</div> <div>hello this is another test</div> <div>t1</div> <div>t2</div> <div>t3</div> </div> The parent div grows to the appropriate width to fit the largest child (which is what I want). However, the vertical scrollbar causes the inner width to be smaller, which causes the largest child to wrap. Is there a way to get the parent to grow to the width of the largest child + the width of the scroll bar? I've tried every margin trick I know, but nothing.

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• Essential skills of a Data Scientist

  - by harshsinghal

  I would like to know more about the relevant skills in the arsenal of a Data Scientist, and with new technologies coming in every day, how one picks and chooses the essentials. A few ideas germane to this discussion: Knowing SQL and the use of a DB such as MySQL, PostgreSQL was great till the advent of NoSql and non-relational databases. MongoDB, CouchDB etc. are becoming popular to work with web-scale data. Knowing a stats tool like R is enough for analysis, but to create applications one may need to add Java, Python, and such others to the list. Data now comes in the form of text, urls, multi-media to name a few, and there are different paradigms associated with their manipulation. What about cluster computing, parallel computing, the cloud, Amazon EC2, Hadoop ? OLS Regression now has Artificial Neural Networks, Random Forests and other relatively exotic machine learning/data mining algos. for company Thoughts?

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• In javascript, how do I find out the name of a function from within that function?

  - by roryhewitt

  The title should make it clear. Is it possible from within a function to determine the name of that function? Basically, I'm adding some debugging code to a number of functions, and I'd like to be able to simply add the following line inside every function: if (global_debugOn) alert("Processing function " + function-name); How can I get 'function-name'? Yes, obviously I could simply type in the function name (after all I'm typing in the whole alert bit), but that's a hassle to do, especially if there is a nice simple way of retrieving it dynamically. Plus, as function names change during development, I'd like to keep it up-to-date... I hoped that maybe the arguments attribute might hold this (e.g. arguments[0], like in C), but I couldn't get it to work. I'm not even sure if arguments works anyway. Thanks! Rory

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• How to use a DHT for a social trading environment

  - by Lirik

  I'm trying to understand if a DHT can be used to solve a problem I'm working on: I have a trading environment where professional option traders can get an increase in their risk limit by requesting that fellow traders lend them some of their risk limit. The lending trader will can either search for traders with certain risk parameters which are part of every trader's profile, i.e. Greeks, or the lending trader can subscribe to requests from certain traders. I want this environment to be scalable and decentralized, but I don't know how traders can search for specific profile parameters when the data is contained in a DHT. Could anybody explain how this can be done?

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• UITextView on iPad INCREDIBLY Slow

  - by Sj

  I have an NSMutableArray of custom views (that are pretty much 1 UITextView and 1 UILabel with a custom back ground image), these are created as they are need (I start with 2 (though the first one is only 2 UITextFields and the other is normal) of these). Now my issue here seems to be this: as soon as I try to edit any UITextView past the one in the 2nd view, it starts to run incredibly slow, not the app, just the textview. For example, as I type, the little blinky guy lags behind the text and when I click to copy/paste/cut/etc you can see the little balloon fly in from the upper left corner every time. I have run the static analyzer for leaks and come up with nothing and run it alongside some other the testing software in XCode and it does not appear to have any reason for this. Any help would be greatly appreciated.

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