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• C++ code generation with Python

  - by norapinephrine

  Can anyone point me to some documentation on how to write scripts in Python (or Perl or any other Linux friendly script language) that generate C++ code from XML or py files from the command line. I'd like to be able to write up some xml files and then run a shell command that reads these files and generates .h files with fully inlined functions, e.g. streaming operators, constructors, etc.

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• Passing around an ElementTree

  - by PulpFiction

  Hello. In my program, I need to make use of an ElementTree object in various functions in my program. More specifically, I am doing this: tree = etree.parse('somefile.xml') I am passing this tree around in my program. I was wondering whether this is a good approach, or can I do this: Create a global tree (I come from a C++ background and I know global is bad) Create the tree again wherever required. Or is my approach ok?

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• How can I get a list of the most recent tags in a wordpress database?

  - by Failpunk

  I am not familiar with the wordpress schema at all and I need to get back a list, or array of the most recent tags from any post in the wordpress database. I just need the data available on the home page so I can then manipulate it. All the functions seem to be designed to work on a per-post basis. (Wordpress really makes me feel sorry for frequent wordpress programmers.)

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• Difference between echo, print and printf

  - by Chakrapani

  please healp out my question... what is the difference between the following functions in php 1. echo 2. print 3. printf

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• Can we write an EOF character ourselves?

  - by Apoorv

  Most of the languages like C++ when writing into a file, put an EOF character even if we miss to write statements like : filestream.close However is there any way, we can put the EOF character according to our requirement, in C++, for an instance. Or any other method we may use apart from using the functions provided in C++. If you need to ask more of information then kindly do give a comment. Thanks in advance.

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• Java API Method Run Times

  - by Mike

  Is there a good resource to get run times for standard API functions? It's somewhat confusing when trying to optimize your program. I know Java isn't made to be particularly speedy but I can't seem to find much info on this at all. Example Problem: If I am looking for a certain token in a file is it faster to scan each line using string.contains(...) or to bring in say 100 or so lines putting them to a local string them performing contains on that chunk.

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• matlab: subs on symbolic constant returns scalar instead of vector for a vector input

  - by noam

  usually, symbolic functions return vectors for vector inputs: syms('x'); f=x*2; subs(f,[1 2 3]) outputs: [2 4 6] but doing f=sym('0'); subs(f,[1 2 3]); outputs: 0 and not: [0 0 0] so basically, my questions is how do I make f behave as a "normal" symbolic function. I can do something ugly like f=x-x to create a function that always returns zero, but is there a prettier way?

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• How to check if a socket is connected/disconnected in C#?

  - by lesderid

  I'm writing an emulator for a game and one of the functions is "SendToAll". How can I check which sockets are still connected? (The client doesn't send a Logout/Disconnect packet.)

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• Enumerate over an enum in C++

  - by jameszhao00

  In C++, Is it possible to enumerate over an enum (either runtime or compile time (preferred)) and call functions/generate code for each iteration? Sample use case: enum abc { start a, b, c, end } for each (__enum__member__ in abc) { function_call(__enum__member__); } Plausible duplicates: C++: Iterate through an enum Enum in C++ like Enum in Ada?

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• symfony autocompletion in netbeans?

  - by fayer

  im using netbeans to code a web application with symfony. it seems that netbeans doesnt support symfony in auto completion. could one fix this problem. cause i want to be able to click on symfony's functions and get to the source, eg helper function and model methods and classes.

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• How can I locate .NET Library property/function that return a particular type?

  - by Michael Bray

  Occasionally I will know that there is a .NET Framework function that returns a particular type of object, but I can't recall the property or function name. It would be really nice to be able to somehow scan the Framework or other DLL for functions that return a particular type of object. (For example, it would have helped when I asked this question, and I have a similar question again.) Can anyone suggest how I might do this?

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• Testing of coding and naming conventions of C/C++ code

  - by shakov

  I'm looking for a script/tool that can be customized to check and enforce coding/naming conventions on a C/C++ code. It should check for example: Code lines are wrapped at some length. Private variables have prefix _ Code is indented properly. All functions are documented.

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• How to hook a function for a particular shared ELF library?

  - by iUm

  LD_PRELOAD hooks some functions for the entire process, but I need to hook a particular function for only one dynamically linked library by its name.

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• Why can't I make my parameter like this?

  - by mystify

  - (void)setPropertyValue:(const *void)inValue forID:(UInt32)propertyID { } The compiler doesn't like the const *void, for some reason. When I have that, it says: error: expected ')' before 'void' When I make the parameter like (UInt32)foo there is no problem. Does const *void only work in functions? I need a parameter which can be a "pointer to anything" like UInt32, Float64, etc.

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• FORTRAN: determine variable type

  - by tibbs

  hello, GOOGLE has yet to find an answer for me, so here goes: In FORTRAN, is there a way to determine the TYPE of a variable? E.G., pass the variable type as an argument in a function, to then be able to call type-specific code with that fuction; eliminating the need to have seperate similar functions for each data type. thanks.

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• jQuery: what if I don't have mouseleave function ?

  - by Patrick

  hi, I'm using Drupal for a website and I can only use jQuery 1.2.7 (not the most recent versions). I want to fade in / fade out a div element and I'm using mouseover / mouseout functions. However, this element contains some children and when I move the mouse over it, the mouseout function is triggered, because I'm moving over one of its children. Since I don't have mouseleave function, how can I solve this issue ? thanks

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• Why is T() = T() allowed in C++?

  - by Rimo

  I believe the expression T() creates an rvalue (by the Standard) However the following code compiles (at least on gcc4.0) class T {... }; int main() { T() = T(); } I know technically this is possible because member functions can be invoked on temporaries and the above is just invoking the operator= on the r-value temporary created from T(). But conceptually this is like assigning a new value to an r-value. Is there a good reason why this is allowed?

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• Determine if a number is a prime with regex?

  - by kitlite

  I found the following code example for Java on RosettaCode: public static boolean prime(int n) { return !new String(new char[n]).matches(".?|(..+?)\\1+"); } I don't know Java in particular but understand all aspects of this snippet except for the regex itself I have basic to basic-advanced knowledge of Regex as you find it in the built-in PHP functions How does .?|(..+?)\\1+ match prime numbers?

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• What runs before main()?

  - by MikimotoH

  After testing on msvc8, I found: Parse GetCommandLine() to argc and argv Standard C Library initialization C++ Constructor of global variables These three things are called before entering main(). My questions are: Will this execution order be different when I porting my program to different compiler (gcc or armcc), or different platform? What stuff does Standard C Library initialization do? So far I know setlocale() is a must. Is it safe to call standard C functions inside C++ constructor of global variables?

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• Struct inside a class

  - by Balakrishnan

  I have a class definition of the form class X { public: //class functions private: A_type *A; //other class variables }; and struct A_type is defined as struct A_type { string s1,s2,s3; }; Inside the constructor, I allocate appropriate memory for A and try A[0].s1="somestring"; It shows segmentation fault. Is this kind of declaration invalid, or am I missing something

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• How can I make python be more friendly regarding reading and writing Unicode text files?

  - by bogdan

  I found that even modern Python versions (like 3.x) are not able to detect BOM on text files. I would like to know if there is any module that could add this missing feature to Python by replacing the open() and codecs.open() functions for reading and writing text files.

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• Using recursion to sum two numbers (python)

  - by James

  I need to write a recursive function that can add two numbers (x, y), assuming y is not negative. I need to do it using two functions which return x-1 and x+1, and I can't use + or - anywhere in the code. I have no idea how to start, any hints?

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• Are there any (somewhat) advanced mathematics Javascript libraries?

  - by pr1001

  Are there any libraries knocking around that provide any additional general purpose math functions for Javascript? Say things like sums over a range, derivatives, integrals, etc. I can imagine that many things aren't possible, so even libraries that do rough approximations would be interesting. Thanks!

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• This is a valid C code but not a valid C++ code?

  - by claws

  In some library I'm using (written in C) its StorePGM(image, width, height, filename) char *image; int width, height; char *filename; { // something something } All functions are defined this way. I never seen such function definitions in my life. They seem to be valid to MSVC but when I compile it as C++ it gives errors. What is it? some kind of old version C?

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• Should the function or the caller be resonsible for input validation?

  - by haudenschilt

  I'm doing a security audit on a fairly large php application and was wondering where I should include my user-input validation. Should I validate the data, then send the clean data off to the back-end functions or should I rely on each function to do it's own validation? Or even both? Is there any standard or best-practice for this sort of thing? Currently the app does both inconsistently and I'll like to make things more consistent.

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