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Articles indexed in March 2010

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• grep beginning of file?

  - by user13743

  In a linux shell, I want to make sure that a certain set of files all begin with <?, having that exact string and no other characters at the beginning. How can I grep or use some other to express "file begins with"?

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• Convert shell logs (incl. escape characters) to HTML?

  - by dehmann

  Is there tool or a regexp that can convert shell escape characters to HTML code? As an example, here is a logfile from GNU screen: ^MESC[K$ ^MESC[K$ exit Executing .bashrc ESC[00;31;31mserver.xyz.com: ESC[00;34;34m~ which I would like to convert to something like this: $ exit Executing .bashrc <font color=red>server.xyz.com</font>: <font color=blue>~</font> and send as HTML e-mail to an e-mail address, to archive my work. Here is a related question, which shows how to convert it to regular text, but it would be nice to convert to HTML and not just throw the escape characters away.

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• How can I make skype calls in Linux?

  - by Grzenio

  Hi, Today I spent more than an hour trying to get Skype set up on my Linux box (Debian testing), but I couldn't make my microphone to work correctly. So I hear the other person talking, but they can't hear me. I am running KDE 4.3 and Skype 2.1 Beta. What do I need to do to get it working?

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• Disk Response Time in Windows 7 Resource Monitor?

  - by Keith Nicholas

  In the resource monitor I'am looking at the disk response time. There are a lot of processes where the response time is thousands of milliseconds consistently, I'm pretty sure this is the source of my computer slowing down. I'm not sure what normal response times are though? I'm running win 7 64bit ultimate. This is running on a new computer, i5 with a terabyte drive, 4gigs of ram, etc, disk is still pretty much empty, so it should all be pretty snappy. And if it is going really slow, how do I track down whats causing it? I've turned off things like real time virus protection as experiments to see if there is something weird there, but makes no real difference (other than it doesn't contribute to the problem by accessing the disk)

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• Home entertainment karaoke system

  - by Mehper C. Palavuzlar

  Here is what I have: 40" Sony Bravia LCD TV, 5+1 speaker system, lots of original Karaoke CDs, and of course, a microphone. To set up a karaoke entertainment system, what kind of hardware do I need? Are there any standalone karaoke players out there? I hope my only option is not having to connect my laptop to TV. I already have karaoke software on my laptop but I wanna step up to a higher level without the help of a computer.

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• Alternative to Canon Printer Software for scanning

  - by Jonathan

  I have an Mp980 Canon Printer, which includes a scanner and it came with some software that allows you to scan directly to a PC with out transferring it using USB drive. But the software is big and bulky, and it includes things like printing photo editing and things I can't be bothered with. Are there any smaller alternatives to this software?

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• Using a sky card in Media Center

  - by Jonathan

  I'm not 100% is this SU suitable but oh well. I'm wondering if it's possible to get a slot of some kind to put my Sky Card into a Media Center PC and then be able to have a triple or dual tuner, and connect to the satelitte dish, allowing me to record 3 and watch a previously recorded. Also it would mean access to Youtube and things easily, with only one box. Also would this be legal or is it similar to Apple where you can only use Mac OSX on boxes with the Apple Logo on?

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• in DDD (gdb) how to skip passed loops

  - by Andrei

  During many, sometimes inundating, debugging sessions using DDD, I stumble upon loops. And I keep pressing next to get passed it, and if there are many iterations, I just set a break point right after it, and press "continue." Is there any other way to go passed loops? Thanks

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• When initializing in C# constructors what's better: initializer lists or assignment?

  - by user260197

  Class A uses an initializer list to set the member to the paramter value, while Class B uses assignment within the constructor's body. Can anyone give any reason to prefer one over the other as long as I'm consistent? class A { String _filename; A(String filename) : _filename(filename) { } } class B { String _filename; B(String filename) { _filename = filename; } }

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• System.Runtime.InteropServices.COMException (0x80070008): Not enough storage is available to process

  - by Darryl Braaten

  I am trying to diagnose this exception. "System.Runtime.InteropServices.COMException (0x80070008): Not enough storage is available to process this command. (Exception from HRESULT: 0x80070008) at System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(RuntimeType objectType) at System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(Type objectType) at System.Runtime.Remoting.Activation.ActivationServices.CreateInstance(Type serverType) at System.Runtime.Remoting.Activation.ActivationServices.IsCurrentContextOK(Type serverType, Object[] props, Boolean bNewObj) at Oracle.DataAccess.Client.CThreadPool..ctor() at Oracle.DataAccess.Client.OracleCommand.set_CommandTimeout(Int32 value) ... It does not look like any of the normal types of "storage" have hit any limits. The application is using about 400MB of memory, 70 threads, 2000 handles and the hard drive has many GB free. The machine is running Windows 2003 Enterprise server with 16GB of RAM so memory shouldn't be an issue. The application is running as a windows service so there are no GDI objects being used. Running out of GDI handles is a common cause of this exception. Database connections, commands & readers are all all wrapped with using blocks so they should be getting cleaned up correctly.

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• What is the difference between an error and an exception in .NET?

  - by Amy

  Please explain me as what is the difference between an error and exception.

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• Qt - arguments in signal-slots

  - by bullettime

  I have a QPushButton, QDateEdit and another custom object. I want to connect the button to the date edit object in a way that when I click the button, the date edit object will change its set date to a date defined on the custom object. Kinda like this: connect(pushbutton,SIGNAL(clicked()),dateedit,SLOT(setDate(custom_object.getDate()))); but I can't do that. Apparently, the connect statement doesn't specify what's the information being passed from the signal to the slot, only the type of the information being passed. Is there a way to do this without having to create a new class?

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• What changed in the DataGrid that means it won't work anymore?

  - by Jeff Yates

  I have a Silverlight app with a DataGrid containing some custom columns and all was working well. Then I updated to Silverlight 3 tools for VS 2008 SP1 and rebuilt it. Now it has the following problems: Rows aren't added when the collection is modified. The ItemsSource property is (and always has been) set to an ObservableCollection instance, which notifies when its contents change. This worked fine for Silverlight 2. However, in Silverlight 3 to get this working at all, I now have to null and then re-set ItemsSource - this seems like I'm hiding a bigger issue but I can't work out what that might be. I cannot select a row or a cell anymore. If I'm lucky, I can select one whole row before it stops working. I can't edit anything. I suspect this is related to the previous point. I'll post some source when I am able, but first I have to strip it down to the bare minimum. In the meantime, I was hoping someone might have some idea of what may be going on here. My gut feeling on the second two points is that my bindings are no longer working, but that's just a guess and if it is the case, I have no idea which ones. Thanks for any help anyone might be able to provide. Update So, I finally reduced my problem down to a simple works/doesn't work comparison. The problem seems to occur if I override Equals in my element type. As soon as I do that, something happens strangely in the ObservableCollection that contains that type, it seems, and my application breaks. To make it more interesting, there is a check to make sure that duplicate items don't even get close to being added to the collection. I don't exactly know why ObservableCollection needs to compare equality when inserting items (the stack trace indicates it is using IndexAt) but this seems to cause the issue. So, any thoughts?

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• Need help on HL7

  - by rohit

  Hi All, I need all your help in guiding me with working on HL7 Interface Integration which I am to work on between two disperate clinical applications. Its something like this ,let me explain my query with an example. "We have Epic system that places orders(lab,medications..etc) presently.Now,next these lab orders are to result in another Cerner application. For this,there has to be a INTERFACE ENGINE which has to read the HL7 messages coming from the EPIC system and translate them to proper messages for the Cerner SYSTEM and then write into their database. So,could you please explain me with an example interface engine which reads the HL-7 messages first and translates them to Cerner application format. How will i implement a Interface Engine here which would read the EPIC data? What steps are involved? An example would be best. Mainly,orders are first placed in EPIC and is to resulted in Cerner applications. **PLEASE PLEASE help me with understanding the process,and how to do interface intregation with an Interface Engine? Thanks Rohit

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• PHP How to create comma separated list from array?

  - by st4ck0v3rfl0w

  Hi All, I know how to loop through items of an array using foreach and append a comma, but it's always a pain having to take off the final comma. Is there an easy PHP way of doing it? $fruit = array('apple', 'banana', 'pear', 'grape'); Ultimately I want $result = "apple, banana, pear, grape"

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• java casting confusion

  - by Stardust

  Could anyone please tell me why the following casting is resulting in compile time error: Long l = (Long)Math.pow(5,2); But why not the following: long l = (long)Math.pow(5,2);

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• When overriding initWithCoder is it always necessary to call [super initWithCoder: coder]

  - by Evan

  In this code I am loading a View Controller (and associated View) from a .xib: -(id)initWithCoder:(NSCoder *)coder { [super initWithCoder:coder]; return self; } This successfully works, but I do not really understand what the line [super initWithCoder:coder] is accomplishing. Is that initializing my View Controller after my View has been initialized? Please be as explicit as possible when explaining. Thanks.

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• Why can final object be modified?

  - by Matt McCormick

  I came across the following code in a code base I am working on: public final class ConfigurationService { private static final ConfigurationService INSTANCE = new ConfigurationService(); private List providers; private ConfigurationService() { providers = new ArrayList(); } public static void addProvider(ConfigurationProvider provider) { INSTANCE.providers.add(provider); } ... INSTANCE is declared as final. Why can objects be added to INSTANCE? Shouldn't that invalidate the use of final. (It doesn't). I'm assuming the answer has to do something with pointers and memory but would like to know for sure.

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• Coercing Json Serializer into producing a particular datetime format (yyyy-mm-ddThh:mm:ss.msmsmsZ)

  - by Chris McCall

  MyClass theSession = new MyClass() { accountId = 12345, timeStamp = DateTime.Now, userType = "theUserType" }; System.Web.Script.Serialization.JavaScriptSerializer Json = new System.Web.Script.Serialization.JavaScriptSerializer(); Response.Write(Json.Serialize(theSession)); Produces: {"accountId":12345,"timeStamp":"\/Date(1268420981135)\/","userType":"theUserType"} How can I present the date as: "timestamp":"2010-02-15T23:53:35.963Z" ?

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• Universal Parse Primitive Type on C#

  - by DreamWalker

  I have string value and Type of some variable (For example int and "32" or bool and true). My type is primitive type. Can I parse string to my type in one line?

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• something more clever time.strptime in python

  - by valya

  Php has a great function strtotime which converts almost any string containing a date with time to timestamp. Is there similar function in Python?

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• Longer Form Fields in Drupal

  - by Slinger Jansen

  I have a really silly problem that has cost me a load of time already. I have created a content template with a URL in there. When I look at the HTML code for it, I see a big fat "maxlength=256" in the form tag. I'd like to expand the length of this field, because my customer wishes to enter really long links (over 500 characters). Any idea how I can change it? When I do a generic search through the code I see so many occurences of 256, but the length might just as well be in the database somewhere. I have of course made the database field a longer varchar (1024 sounded poetic to me), so that's something I don't have to worry about. I think it's silly, but the customer's always right, as we know. I am using Drupal 6.14.

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• shell script problem: does not work on the terminal, but works in a script

  - by jrharshath

  Hi, I was playing with shell scripting, when a strange thing happened. I need someone to explain it. I have a file 'infile', contents: line one line2 third line last a test script test.sh, contents: read var1 echo $var1 i executed: cat infile | ./test.sh output was line one Then I did: cat infile | read var1 echo $var1 Result: a blank line. I even tried cat infile | read var1; echo $var1; same result. why does this happen?

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• LightSpeed with IoC/Dependency Injection using Repository Pattern

  - by dsapala

  Does anyone have an example of using LightSpeed with the Repository Pattern using interfaces and dependency injection?

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• How do I alias the scala setter method 'myvar_$eq(myval)' to something more pleasing when in java?

  - by feydr

  I've been converting some code from java to scala lately trying to teach myself the language. Suppose we have this scala class: class Person() { var name:String = "joebob" } Now I want to access it from java so I can't use dot-notation like I would if I was in scala. So I can get my var's contents by issuing: person = Person.new(); System.out.println(person.name()); and set it via: person = Person.new(); person.name_$eq("sallysue"); System.out.println(person.name()); This holds true cause our Person Class looks like this in javap: Compiled from "Person.scala" public class Person extends java.lang.Object implements scala.ScalaObject{ public Person(); public void name_$eq(java.lang.String); public java.lang.String name(); public int $tag() throws java.rmi.RemoteException; } Yes, I could write my own getters/setters but I hate filling classes up with that and it doesn't make a ton of sense considering I already have them -- I just want to alias the _$eq method better. (This actually gets worse when you are dealing with stuff like antlr because then you have to escape it and it ends up looking like person.name_\$eq("newname"); Note: I'd much rather have to put up with this rather than fill my classes with more setter methods. So what would you do in this situation?

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