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• Is there a faster way to remove un-referenced controls from a Form's designer file?

  - by Eric

  I started looking into the designer file of one of my Forms and noticed that a lot of the old controls I thought I had deleted are still being instantiated but are not actually used on the form. Is there any easy way to clean up these controls from the designer file that are not being used? Right now I've printed out a list of all the private fields at the bottom of the designer file that reference the controls of the form. I'm going down the list one by one trying to determine if the control is actually used or not, and then deleting those that I find are not on the form. The document outline is useful for figuring out what controls are on the form, but this is still a rather tedious process. Does anyone have a better way?

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• MySQL text field issues

  - by chenger

  This is quite a noobish question, I have searched for a few hours now and I know this has to be simple. I am using XAMPP and I am trying to learn some more about using PHP and mySQL together. When I create the DB and the table for information to store, I tried insert info to the table and it stores it as a .dat file rather than text. I know this has to be with how I am setting up the table or the DB but I have gone through things and I think I am just skipping over something. * Apache/2.2.12 (Win32) DAV/2 mod_ssl/2.2.12 OpenSSL/0.9.8k mod_autoindex_color PHP/5.3.0 mod_perl/2.0.4 Perl/v5.10.0 * MySQL client version: 5.1.37 * PHP extension: mysqli that is the phpmyadmin info.

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• Why does using set -e cause my script to fail when called in crontab

  - by SDGuero

  I have a bash script that performs several file operations. When any user runs this script, it executes successfully and outputs a few lines of text but when I try to cron it there are problems. It seems to run (I see an entry in cron log showing it was kicked off) but nothing happens, it doesn't output anything and doesn't do any of its file operations. It also doesn't appear in the running processes anywhere so it appears to be exiting out immediately. After some troubleshooting I found that removing "set -e" resolved the issue, it now runs from the system cron without a problem. So it works, but I'd rather have set -e enabled so the script exits if there is an error. Does anyone know why "set -e" is causing my script to exit? Thanks for the help, Ryan

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• Learn another useful programming language [closed]

  - by Sebi

  I know this question was here a lot of times and can't be answered at all, but im not looking for a single name, but rather for an advice in my situation. I learned programming with Java and now I'm developing in Java for more or less 5 years (at the university) and I thinks my programming skills their are really ok/average. I have also small experience in C/C++ and C#. Now I have some spare time and I'd like to learn a new language or deepen the knowledge of Java/C/C++. But how to choose the right language to learn? I'd like to learn a language which will be usefull in the future concerning working in a software development business? I know there is no single answer, but I'm sure you could mention some languages that are more usefull than others.

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• What are some Coldfusion (mx7 and greater) "Gotchas" that I should know about?

  - by jakeonrails

  I just spent half the day troubleshooting what is apparently a rather famous gotcha for Coldfusion MX7 and below: The nested query loop bug: Where you are required to reference the current_row of the outer query or else you will only see the first record. For example: <cfloop query="outer"> <cfloop query="innner"> <p>#outer.field#</p><!--- this won't work, you'll only get the first row ---> <p>#outer.field[current_row]#</p><!--- you must do this instead ---> </cfloop> </cfloop> Are there any other ways in which ColdFusion does not work in the obvious way?

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• How do programs handle file "opened with..." them?

  - by hmind

  I am wondering if someone could point me in the right direction. You know how for example, in most IDEs, if you open a source file with "open with", it runs the program and opens it up? and then if you open another one, it opens it in a new tab in the same process? My question is NOT how to add a program to the shell commands, but rather: How would a C# application "receive" a PDF file for example? How would the application open the file in the same process when another file is run with it (not having to instances of the program)?

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• what is the best approach for to use openGL in the web?

  - by Y_Y

  I wrote a program in C++/OpenGL (using Dev-C++ compiler) for my calculus 2 class. The teacher liked the program and he requested me to somehow put it online so that instead of downloading the .exe file and run it the web browser will run it automatically just like a java applet. The question is: How if possible, can I display a C++/OpenGL program in a web browser? I am thinking of moving to JOGL which is a java interpretation of OpenGL but I rather stay in C++ since I am more familiar with it. Also is there any other better and easier 3D web base API that I can consider?

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• Slide Effect happening too many times

  - by Abs

  Hello all, I call this functions on onmouseover and onmouseout for several divs. //Takes effect on divs with id, 62,63,64,65... function slide_it(id){ $('#options_'+id).slideToggle('slow'); } The problem is that if I move my mouse over and then mouse out, then again, mouse over and then mouse out. If I do this several times, the slide effect happens the same number of times I moved my mouse over and out of the div, as expected. But I can't figure out how I can do this once? I can set a variable, but I have several divs that this function is used by and I can't think of a simple way of doing this rather than storing things into an array, but this is messy! I really appreciate any help on this that is simple to implement! Thanks all for any help

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• The right way to implement communication between java objects

  - by imoschak

  I'm working on an academic project which simulates a rather large queuing procedure in java. The core of the simulator rests within one package where there exist 8 classes each one implementing a single concept. Every class in the project follows SRP. These classes encapsulate the behavior of the simulator and inter-connect every other class in the project. The problem that I has arisen is that most of these 8 classes are, as is logical i think, tightly coupled and each one has to have working knowledge of every other class in this package in order to be able to call methods from it when needed. The application needs only one instance of each class so it might be better to create static fields for each class in a new class and use that to make calls -instead of preserving a reference in each class for every other class in the package (which I'm certain that is incorrect)-, but is this considered a correct design solution? or is there a design pattern maybe that better suits my needs?

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• file_get_contents not working

  - by DCD

  I am trying to read a file in with file_get_contents () - it's a remote HTTP file, and I've checked the URL and it's fine. Only it doesn't work. More to the point the the error message is the standard Firefox server error: The connection was reset The connection to the server was reset while the page was loading. ... rather than any form of PHP error. It also only took a couple of seconds to come back so it can't be hitting the script runtime limit - any ideas on what is going wrong here? It's PHP 5 on Apache 2, running on Windows btw.

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• Wordpress php: Way to test if pages are children of a parent page?

  - by Erykan

  Hi - Working on my first Wordpress site so I'm sure this is a really basic question. I'm struggling to write a conditional php statement that performs a certain action when a page is a child of a parent page. For example, rather than just specifying one page, as below, I'd like to specify all pages that have the 'About Us' page as a parent: <?php if (is_page('About Us')) echo 'Hello World!'; ?> I've tried the "child_of" function but it wasn't as straightforward as I'd hoped. When I use the below, I get a syntax error - probably just me not knowing how to use the function: <?php if (child_of('About Us')) echo 'Hello World!'; ?> Any suggestions? Thanks!!

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• Query to select from two different tables

  - by ryan

  I would like to select from two tables and display my result using this query: CREATE TABLE Buy_Table ( buy_id int identity primary key, user_id int, amount decimal (18,2) ); go INSERT INTO Buy_Table (user_id, amount) VALUES ('1', 10), ('1', 8), ('1', 20), ('3', 1), ('2', 2); go CREATE TABLE Sell_Table ( sell_id int identity primary key, user_id int, amount decimal (18,2) ); go INSERT INTO Sell_Table (user_id, amount) VALUES ('1', 10), ('1', 8), ('1', 20), ('3', 3), ('2', 3); go select [user_id], 'Buy' as [Type], buy_id as [ID], amount from Buy_Table union all select [user_id], 'Sell', sell_id, amount from Sell_Table order by [user_id], [ID], [Type] However the above query will return each row of the user_id like this I want to display my result to something like this in a grid: Can this be done in query itself rather manipulating the grid? Thx

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• Create div tag template and reuse

  - by user1683645

  Is it possible to create a template e.g with lots of other elements inside it with proper attribute "tagging" and reuse it with jquery? For instance when you want to display user submitted comments without refreshing the page. The reason I ask this is because the code between the div tags are rather long. So using for instance prepend() would be to long to rewrite. Whats the best approach for larger manipulations? Create a separate html? Im pretty new to manipulation, but since I have a programming background i would expect that there is an efficient way to reuse already existing HTML instead of redefining it in jquery.

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• Check If Stored Procedure Returns Value

  - by Eric

  Hello all, I am using Linq 2 Sql in VS 2010, and I have the following stored procedure to check a username and password ALTER PROCEDURE dbo.CheckUser ( @username varchar(50), @password varchar(50) ) AS SELECT * FROM Users Where UserName=@username AND Password=@password The problem I'm having is that it throws an exception if the username and password are incorrect. I'd like to perform a check to see if there is a return value, rather than using try/catch to determine whether the procedure returned a value. Should I do this check in code (C#)? Or is there a way to do it in SQL? Thanks.

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• Count of Distinct Int32 Values in .NET

  - by Eric J.

  I am receiving a stream of unordered Int32 values and need to track the count of distinct values that I receive. My thought is to add the Int32 values into a HashSet<Int32>. Duplicate entries will simply not be added per the behavior of HashSet. Do I understand correctly that set membership is based on GetHashCode() and that the hash code of an Int32 is the number itself? Is there an approach that is either more CPU or more memory efficient? UPDATE The data stream is rather large. Simply using Linq to iterate the stream to get the distinct count is not what I'm after, since that would involve iterating the stream a second time.

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• Python and object/class attrs - what's going on?

  - by digitala

  Can someone explain why Python does the following? >>> class Foo(object): ... bar = [] ... >>> a = Foo() >>> b = Foo() >>> a.bar.append(1) >>> b.bar [1] >>> a.bar = 1 >>> a.bar 1 >>> b.bar [1] >>> a.bar = [] >>> a.bar [] >>> b.bar [1] >>> del a.bar >>> a.bar [1] It's rather confusing!

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• c++: at what point should I start using "new char[N]" vs a static buffer "char[Nmax]"

  - by dan

  My question is with regard to C++ Suppose I write a function to return a list of items to the caller. Each item has 2 logical fields: 1) an int ID, and 2) some data whose size may vary, let's say from 4 bytes up to 16Kbytes. So my question is whether to use a data structure like: struct item { int field1; char field2[MAX_LEN]; OR, rather, to allocate field2 from the heap, and require the caller to destroy when he's done: struct item{ int field1; char *field2; // new char[N] -- destroy[] when done! Since the max size of field #2 is large, is makes sense that this would be allocated from the heap, right? So once I know the size N, I call field2 = new char[N], and populate it. Now, is this horribly inefficient? Is it worse in cases where N is always small, i.e. suppose I have 10000 items that have N=4?

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• Is Java class initialized by the thread which use it for the first time?

  - by oo_olo_oo

  Lets assume following classes definition: public class A { public final static String SOME_VALUE; static { SOME_VALUE = "some.value"; } } public class B { private final String value = A.SOME_VALUE; } Assuming that the class A hasn't been loaded yet, what does happen when object of the class B is instantiated by some thread T? The class A has to be loaded and instantiated first. But my question is: if it's done in context of the thread T, or rather in context of some other (special) "classloader" thread?

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• Path of the local directory

  - by Jayesh

  Hi, A rather simple question; how to find the path of the local directory in which my exe is placed? As-in I have an .exe and in the program I have to create a txt file in the directory where the exe is! [language - C#] So, if the exe is in C:/Temp and is started from there; my txt should be created in C:/Temp If the user wishes to move the exe to D:/Temp and runs from there; I should be able to create the txt file in D:/Temp I tried the Directory.GetCurrentDirectory() but that returns the directory of the execution of the program!

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• How to create a NSPredicate to find entries with leading numerical value?

  - by Toastor

  Hello, I'm using NSPredicates to fetch entities based on a name attribute. Creating a predicate for names beginning with letters was easy (@"name BEGINSWITH %@", searchLetter), however now I'd like to fetch all entities with a name that begins with a numerical value, or rather a non-alphabetical number. What would be the appropriate predicate expression here? Right now I don't want to get too deep into predicate programming, as this is all I need right now and time flies. So, please, don't point me to the Predicate Programming Guide, I just need that expression.. :) Thanks alot guys!

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• Private vs. Public members in practice (how important is encapsulation?)

  - by Asmor

  One of the biggest advantages of object-oriented programming is encapsulation, and one of the "truths" we've (or, at least, I've) been taught is that members should always be made private and made available via accessor and mutator methods, thus ensuring the ability to verify and validate the changes. I'm curious, though, how important this really is in practice. In particular, if you've got a more complicated member (such as a collection), it can be very tempting to just make it public rather than make a bunch of methods to get the collection's keys, add/remove items from the collection, etc. Do you follow the rule in general? Does your answer change depending on whether it's code written for yourself vs. to be used by others? Are there more subtle reasons I'm missing for this obfuscation?

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• Cocoa (Touch) for Swing Developers #1: Where Are the Layouts?

  - by yar

  My iPhone SDK and Objective-C learning is moving ahead quickly, thanks to several great books and online help (including this one). But I do have some basic questions due to what I already know that will be answered eventually, but I'd rather get a heads-up now if possible :) Are there equivalents for LayoutManagers in Cocoa Touch? Are they used, or is absolute positioning used instead? I have seen some of the layout stuff in IB, but I'm not sure what to look at in code. Aside from using the IB, are UIControls added directly to UIView instances using the addSubview (like add in Swing)? These are just two concrete questions that I've thought of just now, but I would love to see any translation of Swing concepts to Cocoa Touch.

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• Delete rows out of table that is innerjoined and unioned with 2 others

  - by jonathan

  We have 3 tables (table1, table2, table3), and I need to delete all the rows from table1 that have the same ID in table2 OR table3. To see a list of all of these rows I have this code: ( select table2.ID, table2.name_first, table2.name_last, table2.Collected from table2 inner join table1 on table1.ID = table2.ID where table2.Collected = 'Y' ) union ( select table3.ID, table3.name_first, table3.name_last, table3.Collected from table3 inner join table1 on table1.ID = table3.ID where table3.Collected = 'Y' ) I get back about 200 rows. How do I delete them from table1? I don't have a way to test if my query will work, so I'm nervous about modifying something I found online and potentially deleting data (we do have backups, but I'd rather not test out their integrity). TIA!

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• Omit attribute name from validation error message (at start of it)?

  - by mrbrdo

  I write code in English but I'm currently doing a site which is fully translated to another language (validation error messages included). However, I have a problem because validation error messages always seem to include the name of the attribute the error is on at the start of the error, e.g.: Title Prosimo izpolnite naziv fakultete. I want to get rid of the Title at the start, like so: Prosimo izpolnite naziv fakultete. Any help is appreciated. I would rather see if this can be solved without installing any 3rd party plugins. If it's possible to provide translations for attribute names, that would be a cool solution too, but I would still like to know how it can be done both ways (omit or translate).

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• CakePHP ACL use case(s)

  - by Jonathan

  I have got a simple web app in development, i want to establish a couple of user groups; Admin, Doctors & Patients. Each group would have their access restricted to particular controller actions rather than individual content. So for example, Doctors can view patient records (index & view actions), but cannot delete them. Usually i would create a groups model, and assign the various users to a group. And filter in the beforeFilter() method to determine if the user has access. But if ACL can do the job, why right the code, right? Thanks

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