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• Do I have to have an 'unregister' button on my users on an email altering application?

  - by Glycerine

  Hey guys - I know this is not a strictly programming question but I'm building an application where users sign up to traffic alerts. I have the whole thing dusted but I haven't got an 'unregister button' I know its good UI to have one, but I was hoping if someone knew the legalities of the topic? The user can sign in and uncheck what alerts to receive, but not scrub their details - On the email sent I have an unsubscribe button. Seeing as this is going to the public, can I turn round to my boss and say "by law we need one" else he might just turn around and try and charge the client, and I don't agree with that for something so rudimentary

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• Find the gender from a name

  - by Ramesh

  Hi guys, I recently confronted with a weird yet interesting question. The questions is as follows: Need to write a program which can give the gender as output based on the name. Example: INPUT -- John Michael Britney OUTPUT-- male male female So this is the output I expect. I tried a lot to solve, but I really was not able to crack it. I will be really thankful to this site for giving me an opportunity to share this question. Actually this is asked in a programming contest as a flyer problem, so I thought this can be programmed.

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• Looking for a wiki-style, standalone, version-control-"safe" documenation package

  - by basszero

  This may sound like it's not a programming related question, but stick with me here... My team and I have found that documenting our project (a development platform w/ API) with a wiki is both useful to us and useful to the users. Due to some organizational issues, we're forced to do multi-site development without network connectivity. We've switched to a DVCS (Mercurial) and had great success with this. The wiki documentation proves to be a problem as the central site is setup with MediaWiki. The offsite people have no way to access or edit the wiki. Is there any sort of wiki-style package which doesn't not require a server/database and will be useable in a DVCS environment? Update: Should be open-source and cross-platform

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• technique for how to debug macros in C

  - by Dervin Thunk

  Hi. So I have the (mostly vilified) #define MAX( a, b ) ( ((a) > (b)) ? (a) : (b) ) somewhere in a program (yes, yes, I know). At some point in the code there is a comparison X>-1?, where X is (as far as I can tell) a (signed) integer. The line is j += MAX(bmGs[i], bmBc[(int)y[i + j]] - m + 1 + i);, where y here is a char*. Not necessarily surprisingly, I find that the macro is returning -1 as the larger number (I'm guessing too long a number for int or an unsigned issue, but I can't find it). I would like to know techniques you guys may have for finding these kinds of errors. Notice that I'm not asking for programming advice about whether or not to use that macro, I'm sure folks are dying to tell me I should refrain from things like that, but the question is going somewhere else. Thanks.

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• Sprintf equivalent in Mathematica?

  - by jxy

  I don't know why Wikipedia lists Mathematica as a programming language with printf. I just couldn't find the equivalent in Mathematica. My specific task is to process a list of data files with padded numbers, which I used to do it in bash with fn=$(printf "filename_%05d" $n) The closest function I found in Mathematica is PaddedForm. And after some trial and error, I got it with "filename_" <> PaddedForm[ Round@#, 4, NumberPadding -> {"0", ""} ]& It is very odd that I have to use the number 4 to get the result similar to what I get from "%05d". I don't understand this behavior at all. Can someone explain it to me? And is it the best way to achieve what I used to in bash?

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• how is a macro expanded in clojure?

  - by john wang

  In the book Programming Clojure(Stuart), when read how macros are expanded I got confused. user=> (defmacro chain ([x form] (list '. x form)) ([x form & more] (concat (list 'chain (list '. x form)) more))) #'user/chain The above macro can be expanded as: user=> (macroexpand '(chain a b c)) (. (. a b) c) But the following is only expanded to the first level: user=> (macroexpand '(and a b c)) (let* [and__3822__auto__ a] (if and__3822__auto__ (clojure.core/and b c) and__3822__auto__)) The and macro source: user=> (source and) (defmacro and([] true) ([x] x) ([x & next] `(let [and# ~x] (if and# (and ~@next) and#)))) Why is the chain macro expanded all the way but the and not ? Why is it not expanded to something like the following: user=> (macroexpand '(chain a b c d)) (. (chain a b c) d)

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• Location of various javax.xml.* packages within the Java 6 SDK.

  - by celestialorb

  Alright, so recently I was using Notepad++ for all of my programming needs, but I've started using Eclipse for larger-scale Java projects now. I decided to pick up an old project of mine which used various classes within the "javax.xml.*" namespaces. When I was compiling and running the program with Notepad++ it worked just fine, however Eclipse can't seem to find these packages. My question is this, since I obviously have the classes somewhere within my current installation of JDK 6 (since I had no problems when using Notepad++), where can I find the location of the .JAR file(s) that include these namespaces/classes so that I can add them to my Eclipse project? Thanks for any help you can give me! Regards, celestialorb Also, if you're curious about the specific packages I'm looking for they are: javax.xml.soap.* javax.xml.transform.* Thanks again!

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• What's the benefit of calling new on an object instance?

  - by Geo

  I'm reading [Programming Perl][1], and I found this code snippet: sub new { my $invocant = shift; my $class = ref($invocant) || $invocant; my $self = { color => "bay", legs => 4, owner => undef, @_, # Override previous attributes }; return bless $self, $class; } With constructors like this one, what's the benefit of calling new on an object instance? I assume that it's what it's for, right? My guess is that if anyone would want to write such a constructor, he would have to add some more code that copies the attributes of the first object to the one about to be created.

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• Universal syntax file format?

  - by Isaiah

  Hey as a project to improve my programing skills I've begun programing a nice code editor in python to teach myself project management, version control, and gui programming. I was wanting to utilize syntax files made for other programs so I could have a large collection already. I was wondering if there was any kind of universal syntax file format much in the same sense as .odt files. I heard of one once in a forum, it had a website, but I can't remember it now. If not I may just try to use gedit syntax files or geany. thanks

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• How can i convert between F# List and F# Tuple?

  - by ksharp

  Is there some way to convert between F# List and F# Tuple? For example: [1;2;3] -> (1,2,3) (1,2,3,4) -> [1;2;3;4] I need two Functions to do that: let listToTuple list = ... let tupleToList tuple = ... Thank you in advance. I think reflection is necessary to this problem. I know the performance is not good. I have to pay the cost of breaking functional programming rule.

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• Remote desktop connection to Raspberry Pi without specifying a port

  - by Max Methot

  I have a Raspberry Pi running Raspbian Wheezy connected in "Site A", where the network is managed by a third party company and where all ports are closed the the Internet (for security reasons). So, there is no way for me to do any port forwarding to VNC, nor SSH or anything else. That means I just can't access it in any way other than locally, on-site. However, I need to connect to that device on the X Desktop session (graphical interface) to do some maintenance, and I am located in let's say "Site B", which is nearly 300 miles away from site A. I know you can do such tasks on Windows or x86 Linux computers with TeamViewer (we use it for our other hardware in the same location and it works like a charm), but since the Raspberry Pi is based on an ARM architecture, it isn't supported by TeamViewer yet. If anyone has ever achieved this, I would be glad to hear how to do it! Thanks!

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• Suggested C++ books?

  - by Josh Bradley

  Ok, I've had one semester of C++ and will be taking a second semester in it after I have taken a Data Structure class this fall. In the first class, we dealt mainly with C++ syntax and the textbook we used was ok, but now I'm wanting to go ahead and purchase a great C++ book that encompasses a lot of the programming concepts used today. I'm learning Objective-C on my own and was able to get through the whole object-oriented stuff pretty easily, along with other things like pointers, inheritance, delegation, etc. It doesn't have to exactly have EVERYTHING in it, but I do want to buy the book with the most information in it. Money is no problem. So my question is what book did you use or still use for C++? Is it a book that you can reference back to if you ever forget how to do something small, or would you have to go online and find the answer.

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• JVM specification and Java compiler code useful for SCJP preparation ?

  - by BenoitParis

  I'm preparing the SCJP exam with the almost official study book ("SCJP Sun Certified Programmer for Java 6 Exam 310-065") I understand that Java programming is writting code that fulfills a certain high-level contract; So that Java can stay platform-independent. However, I have trouble understanding and remembering things when it comes to highly specific SCJP items (and they are numerous) The book stays high-level and does not provide examples of how one compiler would handle things. This is the same thing for runtime issues (JVM level): things are too much abstract for me. Rules often seems arbitrary and therefore, with no well defined purpose, are difficult to remember. Or maybe it's that sometimes I just don't get the underlying purpose. And here is the question: Would a JVM specification and/or some java compiler code help in preparing the SCJP? Have you had the need for such material or is the book sufficient enough? Also, please share the resources you used, apart from the book.

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• What's the advantage for 'attach to process' compared with 'Start Debugging'?

  - by Nano HE

  Hi. I am new to programming. I know only Start debug before. Maybe start debug suit for some small application develop better. I found Visual studio IDE provide another method of attach to process for using. When & Why must I use the attach debugging? Such as multi-threading application debugging. Client/Service application debugging. etc. Thank you.

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• Is there a server side API for Team Foundation Server?

  - by Ralph Shillington

  It would seem there is precious little documentation on programming against a TFS 2010 instance. What bits I have found, have next to nothing in the case of documentation beyond barebones listing of client access classes and their members, most likely autogenerated from the code comments. As I'm interested in building a silverlight client against TFS, I will need access to a server side API. Ideally the silverlight app will talk to my server (mainly for work items) and my server will in turn talk to the TFS server for the goods. Where is the doumentation (if any) for this kind of TFS integration?

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• What technology to use for a RIA

  - by user297159

  I have to develop a online business software solution (similar to ERP) for a company to manage the information exchange for internal use and with external partners. It should be online. What technology should I use, I have checked framewroks like: Flex, Silverlight, Google/GWT, sencha (ExtJS), jQuery, DoJo, Telereik, Infrajistics and others similar. But they seam to be very low level programming. May be this is advantage for other projects, where you need more flexibility, but this project is stright forward. I need something more focused on business software (tables, forms, processes) where and eventually more efficient with less coding, or something I can save time. Is force.com an option? But I can not install this on the customer's servers... Do you have any ideas for me for a web based framework focused on business applications?

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• Associate List<T>.Remove to an event in C#?

  - by Uri

  Hi guys, I have a Products:List<Product> class. I'd like to make it so that every time that I remove an item from that list, my program decreases a counter. Is there a way to do it without overriding the Remove method or decreasing it manually? And if there is none, anybody knows where I can find the code for the Remove method? Thanks! I thought about associating the Remove method to an event, but I don't know how to do it without overriding it or creating another method with the Remove method inside it. Excuse me for my ignorance, but I'm just getting into OOP programming.

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• C++ serial port send command

  - by Ilyssis

  Hi there, I have a hardware here, wich communicates over serial port. I use MS Visual C++ 2010, and I want to send a command: <-S-> I am doing this: SerialPort^ serialPort = gcnew SerialPort(portName , 9600, Parity::None, 8, StopBits::One); serialPort->Open(); serialPort->WriteLine("<-S->"); serialPort->Close(); But the command that goes out is <-S->., and not <-S-> (please notice the point that is attached to the outgoing command). I use Free Serial Port Monitor to watch my ingoing/outcoming data. So how can I get rid of that point in <-S->. ? This is what is going out: 3C 2D 53 2D 3E 0A = <-S-. This is what I want: 3C 2D 53 2D 3E = <-S- Thanks for help.

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• back button wont work.. Iphone

  - by lotuseater

  Hi, I have 2 page controls in my app, one for category and when i click details button of that category other page control comes. I have pushed the first view controller and used present modal view controller. Now a need to go back to the home page from the category page control but the view did load and view will appear wont work. That is where i have added my navigation bar programmatically. is there any way i can call them? i am new to iphone programming. Please help me if you can.... Thankyou

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• byte-sized bit pattern in C and its relevance?

  - by Nikunj Banka

  I a reading Kerninghan and Ritchie's C programming language book and on page 37 it mentions byte sized bit patterns like : '\013' for vertical tab . '\007' for bell character . My doubts : What is byte sized in it and and what's a bit pattern ? What relevance does this hold and where can I apply it ? Is it in any sense related to escape sequences ? I can't seem to find any information what so ever about these byte sized bit patterns on the web . please help . thanks .

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• Session State Anti-Pattern

  - by Curiosity

  I know the SOLID principles and other design patterns fairly well and have been programming for some time now - seeing many a bit of code throughout the years. Having said that, I'm having trouble coming up with a name to give the pattern, or lack thereof, to bits of code I've been dealing with at a current engagement. The application is an ASP.NET C# WebForms application, backed by a SQL Server/Mainframe backend (more mainframe than backend) and it's riddled with Session State properties being accessed/mutated from multiple pages/classes. Accessing/mutating global variables/application state was usually shunned upon while I was in school. Apparently the creators of this magnificent application didn't think it was such a bad idea. Question: Is there a name for such a pattern/anti-pattern that relies so heavily on Session State? I'd like to call the pig by its name ...

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• x86 Assembly - printf doesn't print without "\n"

  - by Bitani

  So I'm confused. I'm going through the book "Programming from the Ground Up" and am working with using libraries. printf is working just fine so long as I include a "\n" in the string, but without it it will print absolutely nothing. Any idea why this happens? Code: .section .data my_str: .ascii "Jimmy Joe is %d years old!\n\0" my_num: .long 76 .section .text .globl _start _start: pushl my_num pushl $my_str call printf movl $1, %eax movl $0, %ebx int $0x80 Also, when I use -m elf_i386 for 32-bit mode and -dynamic-linker /lib/ld-linux.so.2 -lc to link, I get the warning ld: skipping incompatible /usr/lib64/libc.so when searching for -lc If that makes any difference, or if anybody has any suggestions as to how to have it load the 32-bit library directly. Thanks!

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• How to make 2 executables communicate in both directions in Windows

  - by user302099

  Hello. I have 2 Windows console applications, reading from standard input and writing to standard output. I'd like to assume I don't have the source code to any of them (actually I usually have the source code of one of them). I want to direct the standard output of one to the standard input of the other and vice versa, thus allowing communication (the goal is to allow two programs playing a certain game to play one against the other). How can this be done? I'm willing to do some C/C++ programming or anything else required. Oren.

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• C# programmer - necessary to learn C/C++?

  - by Kurresmack

  Hey, I have been programming now for a couple of years. But never any low level language. I started off with some java and some VB. Then I went over to VB.NET and now for a while I have been writing C#. As you see, I have never written any low level language where I had to deal with memory management. Is this something I should do, like a route of passage that every programmer should go through? I am a bit keen on trying to perhaps writing in assembler directly. This would suit me personally good as I have 2 parents that have been writing assembler for ages. Is it necessary for a professional programmer these days to know how to manually manage memory?

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• How do I convert a single char in string to an int

  - by Guest

  Keep in mind, if you choose to answer the question, I am a beginner in the field of programming and may need a bit more explanation than others as to how the solutions work. Thank you for your help. My problem is that I am trying to do computations with parts of a string (consisting only of numbers), but I do not know how to convert an individual char to an int. The string is named "message". for (int place = 0; place < message.size(); place++) { if (secondPlace == 0) { cout << (message[place]) * 100 << endl; } } Thank you.

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