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  • Ruby: How to 'next' an external loop?

    - by Zombies
    file.each_line do |line| #skip the first one/not a user 3.times { next } if first == 1 first = 2 end How can I get the 'next' to well, "next" the iteration of the each_line, instead of the 3.times iteration? Also, how can I write this to look better (ie: first == 1 looks bad)

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  • Aborting a merge in git

    - by user18666
    I've done 'git pull', and received a merge conflict. I know that the other version of the file is good, and that mine is bad (all my changes should be abandoned). How do I do this? unmerged: _widget.html.erb You are in the middle of a conflicted merge.

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  • get metadata from jpg, dng and arw raw files

    - by Daniel
    I was wondering if anyone new how to get access the metadata (the date in particular) from jpg, arw and dng files. I've recently lost the folder structure after a merge operation gone-bad and would like to rename the recovered files according to the metadata. I'm planning on creating a little C++ app to dig into each file and get the metadata. any input is appreciated. ( alternatively, if you know of an app that already does this I'd like to know :)

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  • ajax security ?

    - by Tony
    When I look back my codes that written earlier time, I found something terribly bad. Whenever I want to delete a record in the database, I did like this : $.post("deleteAction.do",{recordId:10}); I cannot prevent a malicious user visit my database operation url directly : deleteAction.do?recordId=10 What's the solution for this kind of problem ?

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  • What are all the concurrent things [data structure, algorithm, locking mechanism] missing in .Net 3.

    - by user49767
    First time I am bit disappointed in StackOverflow cause my http://stackoverflow.com/questions/2571727/c-concurrency-vs-java-concurrency-which-is-neatly-designed-which-is-better question was closed. My intension was just trying to gather knowledge from programming guru's who worked in both the programming technologies. Rather closing this question, please help me by discussing what is good, bad, and ugly in multi-threading part in both the platforms. It is also welcome, if someone would like to compare with .Net 4.0 with JDK 6 (or JDK 7)

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  • C++ shared objects

    - by Klaus
    Hello, I have got four classes A, B, C and D. Class A has a member b of class B. Class B has a member c of class C. A has a member D* dpointer; This hierarchy has to be preserved (in fact this is a GUI with app, window, panel as A, B and C). Now B and C must use a method from *dpointer. Is there something more elegant than giving dpointer as a member of B and C ? Is it bad ?

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  • How to return a const QString reference in case of failure?

    - by moala
    Hi, consider the following code: const QString& MyClass::getID(int index) const { if (i < myArraySize && myArray[i]) { return myArray[i]->id; // id is a QString } else { return my_global_empty_qstring; // is a global empty QString } } How can I avoid to have an empty QString without changing the return type of the method? (It seems that returning an empty QString allocated on the stack is a bad idea) Thanks.

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  • Restrict characters used in a string

    - by Jeremy Rudd
    How do I restrict a string to whitelisted characters? // "HOW am I to understand; this is, BAD" $str = restrictTo($str,"0-9a-z,. "); // " am I to understand this is, " Is there an inbuilt function in PHP that does something close? I can't formulate a regular expression for this though :(

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  • Limitations in running Ruby on windows7

    - by orkutscraps
    n the installation documentation to RoR it mentions that there are many limitations to running Ruby on Rails on Windows7, and in some cases, whole libraries do not work. How bad are these limitations, should I always default to Linux to code / run RoR, and is Iron Ruby expected to fix these limitations or are they core to the OS itself?

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  • a good resource or book for architecting object-oriented software

    - by Ygam
    I have looked at a couple of books and all I have looked at were just discussing the technicalities of OOP. By technicalities I mean, here's a concept, here's some code, now get working. I have yet to see a book that discusses the architectural process, what are the ways of doing this, why doing this is bad, how to actually incorporate design patterns in a real-world project, etc. Can you recommend a good resource or book? I am mainly programming with PHP but a language-agnostic book/resource would do :)

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  • Do you say No to C# Regions?

    - by LittleBoy
    The idea behind the question is - Just say No! to C# Regions It is said that "the reason to use #region tags because all the things they are hiding is just really bad code." How do you use regions effectively?

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  • Is it OK to put a standard, pure C header #include directive inside a namespace?

    - by mic_e
    I've got a project with a class log in the global namespace (::log). So, naturally, after #include <cmath>, the compiler gives an error message each time I try to instantiate an object of my log class, because <cmath> pollutes the global namespace with lots of three-letter methods, one of them being the logarithm function log(). So there are three possible solutions, each having their unique ugly side-effects. Move the log class to it's own namespace and always access it with it's fully qualified name. I really want to avoid this because the logger should be as convenient as possible to use. Write a mathwrapper.cpp file which is the only file in the project that includes <cmath>, and makes all the required <cmath> functions available through wrappers in a namespace math. I don't want to use this approach because I have to write a wrapper for every single required math function, and it would add additional call penalty (cancelled out partially by the -flto compiler flag) The solution I'm currently considering: Replace #include <cmath> by namespace math { #include "math.h" } and then calculating the logarithm function via math::log(). I have tried it out and it does, indeed, compile, link and run as expected. It does, however, have multiple downsides: It's (obviously) impossible to use <cmath>, because the <cmath> code accesses the functions by their fully qualified names, and it's deprecated to use in C++. I've got a really, really bad feeling about it, like I'm gonna get attacked and eaten alive by raptors. So my question is: Is there any recommendation/convention/etc that forbid putting include directives in namespaces? Could anything go wrong with diferent C standard library implementations (I use glibc), different compilers (I use g++ 4.7, -std=c++11), linking? Have you ever tried doing this? Are there any alternate ways to banish the math functions from the global namespace? I've found several similar questions on stackoverflow, but most were about including other C++ headers, which obviously is a bad idea, and those that weren't made contradictory statements about linking behaviour for C libraries. Also, would it be beneficial to additionally put the #include <math.h> inside extern "C" {}?

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  • What's the big deal with brute force on hashes like MD5

    - by Jan Kuboschek
    I just spent some time reading http://stackoverflow.com/questions/2768248/is-md5-really-that-bad (I highly recommend!). In it, it talks about hash collisions. Maybe I'm missing something here, but can't you just encrypt your password using, say, MD5 and then, say, SHA-1 (or any other, doesn't matter.) Wouldn't this increase the processing power required to brute-force the hash and reduce the possibility of collision?

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  • What happens inside the try block?

    - by dontWatchMyProfile
    Example: @try { // 1) do bad stuff that can throw an exception... // 2) do some more stuff // 3) ...and more... } @catch (NSException *e) { NSLog(@"Error: %@: %@", [e name], [e reason]); } If 1) throws an exception, is the block immediately canceled like a return in a function or a break in a loop? Or will 2) and 3) be processed no matter what happens in 1)?

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  • Git undo last commit.

    - by Justin
    I merged the wrong way between two branches. I then ran the following: git reset --hard HEAD^ I am now back at the previous commit (which is where I want to be). Was that the correct thing to do? The bad commit is still in the repository, is that okay or should I do something else to remove it from the repository? I have not pushed or committed anything else yet.

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  • PHP turn off errors - in one file only

    - by Industrial
    Hi! I am well aware about error_reporting(0); & ini_set('display_errors', "Off"); to make error messages go away. What would be an appropriate way to do this - for a specific file or part of code only? Surpressing errors with @'s seems like a bad idea since it apparently slows the code down... Thanks!

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  • How to save memory when reading a file in Php ?

    - by coolboycsaba
    I have a 200kb file, what I use in multiple pages, but on each page I need only 1-2 lines of that file so how I can read only these lines what I need if I know the line number? For example if I need only the 10th line, I don`t want to load in memory all the lines, just the 10th line. Sorry for my bad english!

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  • (android) rows of buttons that take up the entire width of the screen

    - by user558043
    I am trying to make 3 rows of 4 buttons each that will take up the entire width of the screen. I have tried Linear Layout but have trouble adding a second row and from what I have read nesting Linear Layouts is bad practice. I tried to use relative layout several times but I cannot manage to get the buttons to fill the width of the screen because it ignores layout_weight, I then tried nesting linear layout in relative layout but layout_weight is still ignored. What is the best way to accomplish this?

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  • IIS6 host multiple websites under same sub-domain (or something similar)

    - by Sigurbjörn
    Hi there! I'm trying to figure out a structure for a hosted application that i'm working on. I've got a domain lets call it app.company.com (a sub-domain company.com of course) that is setup to redirect to my IIS 6 web server. I would like to set up one website in IIS for each client that will use this application. And have the URL schema be like this: app.company.com/clientA -- would point to ClientA website in IIS app.company.com/clientB -- would point to ClientB website in IIS Do you guys have any pointers or best practices for my scenario?

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