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  • Create objective-c class instance by name?

    - by Mark
    Duplicate: http://stackoverflow.com/questions/1034350/dynamic-class-creation-in-objective-c/1034368#1034368 Is it possible to create an instance of a class by name? Something like: NSString* className = @"Car"; id* p = [Magic createClassByName:className]; [p turnOnEngine]; I don't know if this is possible in objective-c but seems like it would be, Thanks

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  • Visual Studio macro to read compilation errors and fix implicit conversions automatically in VB.NET

    - by eckesicle
    I am converting a large project in VB.NET that is using Option Strict Off into Option Strict On Naturally I am running into the same compilation error over and over. Strict On does not allow implicit conversion from Object to String/Integer/Double Is it possible to to access the compilation errors with a macro and automatically append .ToString() to the erroneous implicit conversion. Essentially my question is a duplicate off http://stackoverflow.com/questions/2532340/tools-to-convert-option-strict-off-code-into-option-strict-on but that question had no answers. Cheers.

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  • PHP: How to find most used array key?

    - by oni-kun
    Lets say I have a simple 1D array with 10-20 entries. Some will be duplicate, How would I find out which entry is used the most? like.. $code = Array("test" , "cat" , "test" , "this", "that", "then"); How would I show "test" as the most used entry?

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  • collect2: ld returned 1 exit status error in Xcode

    - by user573949
    Hello, Im getting the error Command /Developer/usr/bin/gcc-4.2 failed with exit code 1 and when the full log is opened, the error is more accurately listed as: collect2: ld returned 1 exit status from this simple Cocoa script: #import "Controller.h" @implementation Controller int skillcheck (int level, int modifer, int difficulty) { if (level + modifer >= difficulty) { return 1; } if (level + modifer <= difficulty) { return 0; } } int main () { skillcheck(10, 2, 10); } @end the .h file is this: // // Controller.h // // Created by Duo Oratar on 15/01/2011. // Copyright 2011 __MyCompanyName__. All rights reserved. // #import <Cocoa/Cocoa.h> @interface Controller : NSObject { int skillcheck; int contestcheck; } @end and no line was specified that the error came from, does anyone know what the source of this error is, and more importantly, how to fix it? EDIT: I removed the class so now I have this: // // Controller.m // // Created by Duo Oratar on 15/01/2011. // Copyright 2011 __MyCompanyName__. All rights reserved. // #import "Controller.h" int skillcheck (int level, int modifer, int difficulty) { if (level + modifer >= difficulty) { return 1; } if (level + modifer <= difficulty) { return 0; } } int main () { skillcheck(10, 2, 10); } and for the .h file: // // Controller.h // // Created by Duo Oratar on 15/01/2011. // Copyright 2011 __MyCompanyName__. All rights reserved. // #import <Cocoa/Cocoa.h> and the log says: (thanks to the guy who said how to open it) Ld build/Debug/Calculator.app/Contents/MacOS/Calculator normal x86_64 cd /Users/kids/Desktop/Calculator setenv MACOSX_DEPLOYMENT_TARGET 10.6 /Developer/usr/bin/gcc-4.2 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk -L/Users/kids/Desktop/Calculator/build/Debug -F/Users/kids/Desktop/Calculator/build/Debug -filelist /Users/kids/Desktop/Calculator/build/Calculator.build/Debug/Calculator.build/Objects-normal/x86_64/Calculator.LinkFileList -mmacosx-version-min=10.6 -framework Cocoa -o /Users/kids/Desktop/Calculator/build/Debug/Calculator.app/Contents/MacOS/Calculator ld: duplicate symbol _main in /Users/kids/Desktop/Calculator/build/Calculator.build/Debug/Calculator.build/Objects-normal/x86_64/Controller.o and /Users/kids/Desktop/Calculator/build/Calculator.build/Debug/Calculator.build/Objects-normal/x86_64/main.o collect2: ld returned 1 exit status Command /Developer/usr/bin/gcc-4.2 failed with exit code 1 ld: duplicate symbol _main in /Users/kids/Desktop/Calculator/build/Calculator.build/Debug/Calculator.build/Objects-normal/x86_64/Controller.o and /Users/kids/Desktop/Calculator/build/Calculator.build/Debug/Calculator.build/Objects-normal/x86_64/main.o Command /Developer/usr/bin/gcc-4.2 failed with exit code 1

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  • How do I convert a TimeSpan to a formatted string?

    - by Michael Wheeler
    Exact Duplicate Timespan formatting First question here: I have two DateTime vars, beginTime and endTime. I have gotten the difference of them by doing the following: TimeSpan dateDifference = endTime.Subtract(beginTime); How can I now return a string of this in hh hrs, mm mins, ss secs format using C#. If the difference was 00:06:32.4458750 It should return this 00 hrs, 06 mins, 32 secs Thanks for the help

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  • Amazon SimpleDB Identity Seed equivalent

    - by Zaff
    Is there an equivalent to an identity Seed in SimpleDB? If the answer is no, how do you handle creating something like a customer number or order number that will prevent the creation duplicate numbers? My experience is mainly from SQL Server in which I would either create a primary key with an identity seed or use transactions in a stored procedure to increment the number. Thanks for your help!

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  • Securing a .NET Application [closed]

    - by beakersoft
    Duplicate: Protecting .NET Code from Reverse Engineering We've recently released a small application and this weekend I found a cracked version of it on Piratebay that had the registration checking removed, so the app ran as if it was a registered version. Apart from using a code obfuscation tool (which doesn't seem to be that hard to get around), are there any standard things we should be doing to make our .NET applications more difficult to crack?

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  • Is it worth learning ASP.Net AJAX

    - by Yogendra
    Hi All, I know this is a duplicate kind of question. I have worked with ASP.Net and ASP.Net MVC 1.0. I never really got a chance to get into ASP.Net AJAX. My question is it really worth to invest in learning ASP.Net AJAX 3.5 or 4.0 given the fact, I have hardly used it ? Please let me know your advise.

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  • What is <ns0: for?

    - by Doug
    I was looking at this question: http://stackoverflow.com/questions/117641/how-to-remove-duplicate-elements-from-an-xml-file It has <ns0: for ? I have never seen it before.

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  • Time consts in Java?

    - by yossale
    Is there a Java package with all the annoying time consts , like miliseconds/seconds/minutes in a minute / hour /day / year ? I'd hate to duplicate something like that Thanks!

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  • What is the maximum length of a C# string [closed]

    - by Ahmet Altun
    Possible Duplicate: What is the maximum possible length of a .NET string? How long a C# string can be in maximum? Is there any limitation? Considering if MSN was written in C#, the instant messaging would be designed as Textbox. So, the content would be Textbox.text, which is a string. But can System.string can store such a long value. I assume, string class holds value contiguously.

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  • how to move a postgres schema via file operations ?

    - by Jerome WAGNER
    Hello, I have a schema schema1 in a postgres database A. I want to have a duplicate of this schema (model + data) in database B under the name schema2. What are my options ? I currently : * dump schema1 from database A * sed my way through schema renaming in the dump : schema1 becomes schema2 * restore schema2 in database B but I am looking for a more efficient procedure. For instance, via direct file operations on postgres binary files. Thanks for your help Jerome Wagner

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  • Visual Studio Default Browser (MVC)

    - by Kirschstein
    Possible Duplicate: Visual Studio opens default browser instead of IE I want to change the default browser used by Visual Studio for debugging. Normally the route I'd take to do this is right clicking on an .aspx file and setting the default from the 'browse with' dialog. Unfortunately, MVC views don't have the browse with option. What other ways can you set the default browser? EDIT: FireFox is set to my default browser in Windows, but VS still opens up IE.

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  • Most useful free Java libraries?

    - by Pyrolistical
    I've never seen a good list of free Java libraries. What are some of your can't-live-without Java libraries? Note: to keep this poll as useful as possible, please remember: Post only one library per answer We don't want duplicate answers, so before posting check if the library has been mentioned already When adding a new library, provide a short summary of what it does / why you think it's useful

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  • Postgres query optmization

    - by hdx
    Hey guys, trying to optimize this query to solve a duplicate user issue: SELECT userid, 'ismaster' AS name, 'false' AS propvalue FROM user WHERE userid NOT IN (SELECT userid FROM userprop WHERE name = 'ismaster'); The problem is that the select after the NOT IN is 120.000 records and it's taking forever. Any suggestion?

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  • Is O_NONBLOCK being set a property of the file descriptor or underlying file?

    - by Daniel Trebbien
    From what I have been reading on The Open Group website on fcntl, open, read, and write, I get the impression that whether O_NONBLOCK is set on a file descriptor, and hence whether non-blocking I/O is used with the descriptor, should be a property of that file descriptor rather than the underlying file. Being a property of the file descriptor means, for example, that if I duplicate a file descriptor or open another descriptor to the same file, then I can use blocking I/O with one and non-blocking I/O with the other. Experimenting with a FIFO, however, it appears that it is not possible to have a blocking I/O descriptor and non-blocking I/O descriptor to the FIFO simultaneously (so whether O_NONBLOCK is set is a property of the underlying file [the FIFO]): #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main(int argc, char **argv) { int fds[2]; if (pipe(fds) == -1) { fprintf(stderr, "`pipe` failed.\n"); return EXIT_FAILURE; } int fd0_dup = dup(fds[0]); if (fd0_dup <= STDERR_FILENO) { fprintf(stderr, "Failed to duplicate the read end\n"); return EXIT_FAILURE; } if (fds[0] == fd0_dup) { fprintf(stderr, "`fds[0]` should not equal `fd0_dup`.\n"); return EXIT_FAILURE; } if ((fcntl(fds[0], F_GETFL) & O_NONBLOCK)) { fprintf(stderr, "`fds[0]` should not have `O_NONBLOCK` set.\n"); return EXIT_FAILURE; } if (fcntl(fd0_dup, F_SETFL, fcntl(fd0_dup, F_GETFL) | O_NONBLOCK) == -1) { fprintf(stderr, "Failed to set `O_NONBLOCK` on `fd0_dup`\n"); return EXIT_FAILURE; } if ((fcntl(fds[0], F_GETFL) & O_NONBLOCK)) { fprintf(stderr, "`fds[0]` should still have `O_NONBLOCK` unset.\n"); return EXIT_FAILURE; // RETURNS HERE } char buf[1]; if (read(fd0_dup, buf, 1) != -1) { fprintf(stderr, "Expected `read` on `fd0_dup` to fail immediately\n"); return EXIT_FAILURE; } else if (errno != EAGAIN) { fprintf(stderr, "Expected `errno` to be `EAGAIN`\n"); return EXIT_FAILURE; } return EXIT_SUCCESS; } This leaves me thinking: is it ever possible to have a non-blocking I/O descriptor and blocking I/O descriptor to the same file and if so, does it depend on the type of file (regular file, FIFO, block special file, character special file, socket, etc.)?

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  • Some F# Features that I would like to see in C# any help?

    - by WeNeedAnswers
    After messing about with F# there are some really nice features that I think I am going to miss when I HAVE to go back to c#, any clues on how I can ween myself off the following, or better still duplicate their functionality: Pattern Matching (esp. with Discriminating Unions) Discriminating Unions Recursive Functions (Heads and Tails on Lists) And last but not least the Erlang inspired Message Processing.

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  • Binary Search Help

    - by aloh
    Hi, for a project I need to implement a binary search. This binary search allows duplicates. I have to get all the index values that match my target. I've thought about doing it this way if a duplicate is found to be in the middle: Target = G Say there is this following sorted array: B, D, E, F, G, G, G, G, G, G, Q, R S, S, Z I get the mid which is 7. Since there are target matches on both sides, and I need all the target matches, I thought a good way to get all would be to check mid + 1 if it is the same value. If it is, keep moving mid to the right until it isn't. So, it would turn out like this: B, D, E, F, G, G, G, G, G, G (MID), Q, R S, S, Z Then I would count from 0 to mid to count up the target matches and store their indexes into an array and return it. That was how I was thinking of doing it if the mid was a match and the duplicate happened to be in the mid the first time and on both sides of the array. Now, what if it isn't a match the first time? For example: B, D, E, F, G, G, J, K, L, O, Q, R, S, S, Z Then as normal, it would grab the mid, then call binary search from first to mid-1. B, D, E, F, G, G, J Since G is greater than F, call binary search from mid+1 to last. G, G, J. The mid is a match. Since it is a match, search from mid+1 to last through a for loop and count up the number of matches and store the match indexes into an array and return. Is this a good way for the binary search to grab all duplicates? Please let me know if you see problems in my algorithm and hints/suggestions if any. The only problem I see is that if all the matches were my target, I would basically be searching the whole array but then again, if that were the case I still would need to get all the duplicates. Thank you BTW, my instructor said we cannot use Vectors, Hash or anything else. He wants us to stay on the array level and get used to using them and manipulating them.

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