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Posts by celtschk
C does have references, but it does not have pass by reference. A reference is simply an expression that references an object (object here is meant in the general sense, not in the OO sense; for e...
For some reason, I just wanted to undo a commit on my git repository, which I've done with the following command: git reset --soft HEAD~1 So far, so good. However, by mistake I issued the comma...
Since accessing the memory allocated by malloc beyond the size given to the call is undefined behaviour (which means that the standard poses no restriction to the behaviour of a program that does t...
While I agree with Dirk Herrmann that basename is the right tool for the job, I think it is still worthwhile to know how to do it with grep, because you might one day encounter a sufficiently simil...
I've just started playing around with pygame and have written a small game in it, of which I'd like a review. Note that I'm not only a complete beginner in pygame, but I also have very little exper...
Your function returns a pointer to a local non-static variable. Such a variable exists only during execution of the function and is removed on return. This means you are left with a so-called dangl...
The main problem with using floating point is that the typical floating point type is binary floating point. But in binary floating point, most decimal fractions cannot be represented exactly. That...
Not only does the C language not guarantee it, it also will fail on actual compilers, as soon as you enable optimisation (which you'll generally want to do because you want your code run fast, afte...
I've just dived into pygame and written a little game in it, of which I'd like a review (it's my first try of pygame). However I'm not sure if it is a good fit for the site, and if so, how exactly ...
Besides the possible issues that Lundin told you, there is also the possibility that the current directory of the program is not what you think it is (note that the current directory is not necessa...
I've written a class that allows to access dictionary entries of arbitrary dicts with appropriate string keys through attribute access syntax on an instance of the class. My questions are: Is...
Having recently learned about protocols in Python, I now wonder if you can write a protocol for enumerations. That is, a protocol that says that you are supposed to pass an enum that has certain it...
I've written the following code implementing a state machine in Python, and I'd like some feedback on it. The basic idea is that each state has a set of corresponding actions that trigger a state ...
The standard does not talk about object files and/or linking, but it does talk about translation units. In typical compilers, a single translation unit translates into a single object file. Obviou...
On this answer I just reacted with “works for me” with comment, but then retracted it because of what finally turned out to be a mistake on my end, and deleted also the comment (and thus the commen...
You've got an inefficiency in your code, as you always do replacements 3/2 times the length of the string. That is unnecessarily expensive. By instead testing in each iteration whether the length ...
I have a git history that basically looks like this: * commit: XXX (HEAD -> main) | | * commit: YYY | | * commit: ZZZ (origin/main) | | ... Now I would like to turn everything after...
A pitfall in C++ that I didn't see mentioned in the other answer is that it might give unexpected results with libraries using expression templates. What are expression templates? In a nutshell, ...
Just as an additional information: If you are writing Python code, there's the useful package appdirs that provides a platform-agnostic interface to user-specific application data directories. For ...
The reason why it is undefined behaviour instead of a hard error is that the problem of determining it is, quite literally, equivalent to the halting problem. So any implementation will either warn...
