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• What is the function definition for member?

  - by NHans

  (define (member atom list) (cond ((null? list) '()) (= atom (car list) "True") (else (member atom(cdr list))) ) ) (member '5 '(1 2 3 4 5)) Always it gives true even though that atom isn't a member in the list. Could you plz help me to clarify this question as soon as possible.

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• Query interface for iPhone CoreData store

  - by JT

  Hi, another iPhone newbie question... I have the following: NSPersistentStoreCoordinator NSManagedObjectContext NSManagedObjectModel Is it possible to run queries directly on the store (since its a sqlite DB)? I'm trying to delete all the records from a tableview, and figured a "DELETE FROM table" would be nice and quick as opposed to looping through the records and removing them manually (which i'm also struggling with). Thanks for your time, James

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• In C#, is there any difference in how to raise a event? (Use SomeEvent(arg) or SomeEvent.Invoke(arg

  - by LLS

  The question is just the simple one: Is there any difference in using SomeEvent(arg); and SomeEvent.Invoke(arg); If there is no significant difference, which one is the better practice? Thanks

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• Submitting form with links and jquery

  - by Eagletrophy

  Me again, I have a question I would like to ask as a followup. to submit a form using a link powered by jquery is what I am curious about. do I just bind a click event to the link in the live() event for eg and use a submit() added to the click? God bless

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• How can I run Gcov over an installed Cocoa application?

  - by Joe

  I have a Cocoa application which uses an installer. I want to be able to run code coverage over the code (after it has been installed). This is not the usual unit-test scenario where a single binary will run a suite of tests. Rather, the tests in question will interact with the UI and the app back-end whilst it is running, so I ideally want to be able to start the application knowing that Gcov is profiling it and then run tests against it. Any ideas?

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• Validating entered user data

  - by msfanboy

  Hello, this is a general question but I do a desktop application. Should I check for example the firstname exceeding 50 chars or is this a matter of taste? Or should I check for 50 chars because the user could flood my database with 10000000 chars ?

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• nginx_http_push_module and databases

  - by rui7905

  i am a newbie of nginx , and i am using nginx as a comet server by nginx_http_push_module i have two question: 1,how can i save the messages which recieved by nginx_http_push_module into databases ? 2,how can i get listeners list of a channel ? thanks~

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• Multiple certs with one private key on apache?

  - by tenbatsu

  Really fundamental question here, but nothing a quick google search is lending itself to. Do I need to generate a separate private key for each cert I use in apache? Server details: % /usr/sbin/httpd -v Server version: Apache/2.2.8 (Unix) Server built: Jan 24 2008 10:44:19 % uname -a Linux *.com 2.6.23.15-80.fc7 #1 SMP Sun Feb 10 17:29:10 EST 2008 i686 i686 i386 GNU/Linux % cat /proc/versionversion 2.6.23.15-80.fc7 ([email protected]) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-27)) #1 SMP Sun Feb 10 17:29:10 EST 2008

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• Move from TFS 2008 to TFS 2010

  - by raffaeu

  We have succesfully built our TFS 2010 infrastructure and the first VM using Visual Studio 2010. Now I have a very simple question. How I can move a solution from our existing TFS 2008 to the new one 2010? Is there any tool included in TFS?

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• Safe vs Unsafe code

  - by Lumpy

  Read this question today about safe and unsafe code I then read about it in MSDN but I still don't understand it. Why would you want to use pointers in C#? Is this purely for speed?

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• DisplayFor ignores metadata

  - by Juvaly

  For my Contact class, the property EmailAddress is marked with the [DataType(DataType.EmailAddress)] attribute. In my view, using Html.Display("EmailAddress") and Html.DisplayFor(c => c.EmailAddress) yields different results. The former outputs a mailto: link, which is the expected behavior, while the latter simply outputs the email address as plain text. My question is why the different behavior, I expected these two methods to have the same output.

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• How to remove digits from the end of the string using SQL

  - by user307880

  Please, could you answer my question. How to remove digits from the end of the string using SQL? For example, the string '2Ga4la2009' must be converted to 2Ga4la. The problem is that we can't trim them because we don't know how many digits are in the end of the string. Best regards, Galina.

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• How initialize array of classes? (C++)

  - by Kra

  Hello, I have this class constructor: Pairs (int Pos, char *Pre, char *Post, bool Attach = true); How can I initialize array of Pairs classes? I tried: Pairs Holder[3] = { {Input.find("as"), "Pre", "Post"}, {Input.find("as"), "Pre", "Post"}, {Input.find("as"), "Pre", "Post"} }; Apparently it's not working, I also tried to use () brackets instead of {} but compiler keeps moaning all the time. Sorry if it is lame question, I googled quite hard but wasn't able to find answer :/ Thanks.

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• Accessing JAR resources

  - by Pablo Fernandez

  I have a jar file with resources (mainly configuration for caches, logging, etc) that I want to distribute. I'm having a problem with the relative paths for those resources, so I did what I've found in another stackoverflow question, which said that this was a valid way: ClassInTheSamePackageOfTheResource.class.getResourceAsStream('resource.xml'); Sadly this does not work. Any ideas? Thanks! PS: Obviously I cannot use absolute paths, and I'd like to avoid environment variables if possible

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• Is Perforce's C++ P4API thread-safe?

  - by Scott Bilas

  Simple question - is the C++ API provided by Perforce thread-safe? There is no mention of it in the documentation. By "thread-safe" I mean for server requests from the client. Obviously there will be issues if I have multiple threads trying to set client names and such on the same connection. But given a single connection object, can I have multiple threads fetching changelists, getting status, translating files through a p4 map, etc.?

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• roundig up to a certain floating point- matlab

  - by Chaggster

  hi. im new in MATLAB. i think its a simple question. i want: a=1.154648126486416 to become a=1.154 and not a=1.54000000000 how do i do that without useing format('bank'). thanks.

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• datepicker new date offset of 2 days

  - by HenkD

  Hi, im using datepicker v2. And I have a question. Is there a possibility to let the currentdate have a offset of 2 days. For example; today is it 14may. Can i let the datepicker start today with 16may? And that 14&15 aren't selectable? Greetz from Belgium

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• Initialize an object in java

  - by harigm

  Is it the right Way we initialise the the object? I have a class Sample I want to initialise the Object in my Sample1 Class After intialisation I dont require to use the object of Sample Class. In that Case Can I initialise that object as new Sample(); instead of Sample s = new Sample(); if I am not going to use s anywhere in my Sample1 Class My question, is this a good practice to do that? will there be any after affects

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• What is the difference between printf() and puts() in C?

  - by alex

  First up, I should let you know that I am learning C, so my apologies if this question seems stupid to a more advanced developer. I know you can print with printf() and puts(). I can also see that printf() allows you to embed variables inside and do some stuff like formatting. Is puts() merely a primitive version of printf(). Should it be used for every possible printf() without string interpolation? Thanks

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• getting data from xml tags that have : (colon in them)

  - by user3536228

  I am using AIR to build an application that will search and show the thumbnails from deviantART the request URL for getting resuts in form of RSS feed i get the following for simplicity i am showing the only code in which i have my question we can use this for tag trace(myxml.channel.item[0].title); but what to do for tags like media:content trace(myxml.channel.item[0].media:content); but it does not work The colons are confusing me

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• Proper way of defining namespace in Lowpro + Prototype

  - by sharas

  Is there any beautiful practice of defining namespace in Lowpro + Prototype Event.addBehavior? Sorry if this question reappeared earlier, but I've been googling and looking in stackoverflow for some time.

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• C# - OR and AND

  - by Alexry

  Newbie question. How to calculate the value of the formula A f B, where f - the boolean function OR or AND?

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• When to Multithread and when not to Multithread c++ applications?

  - by Ashwin

  I have been in an assumption that multithreading gives a lot of flexibility and power to make efficient programs. But I am wrong. Multithreading is sometimes not desirable as it will create serious impact on the way the actual program behaves. My question? I am not sure of when to use and when not to use multithreads in applications. Please update this thread and give your opinions on multithreading and suggestions on its usage scenarios.

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• access parametrically values of variables inside environments

  - by Apostolos

  Let's say we have one or more environments and variables in them. My question is how we access the values of these variables, parametrically. rm(list = ls()) env1 <- new.env() env1$var1 <- "value1" env2 <- new.env() env2$var2 <- "value2" env <- ls.str(mode="environment") # We get the environments var <- ls.str(eval(parse(text = env[1])))# We get the variables of an environment eval(var[1]) # We fail to get the value of a variable Thank you all, in advance

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• A way to make md5_file() faster?

  - by Rob

  I currently use md5_file(); to run through about 15 URLs and verify their MD5. Is there a way I can make this faster? It takes far too long to run through all of them. Sorry if this isn't a good question, I just realized its only three (four if you count this one) sentences long.

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