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...

posted 3y ago by celtschk‭

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...

2 answers  ·  posted 3y ago by celtschk‭  ·  edited 3y ago by Alexei‭

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...

posted 3y ago by celtschk‭  ·  edited 3y ago by elgonzo‭

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...

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 8d ago by Alexei‭

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...

posted 3y ago by celtschk‭

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...

posted 3y ago by celtschk‭

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 ...

2 answers  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by Peter Taylor‭

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...

posted 3y ago by celtschk‭  ·  edited 3y ago by celtschk‭

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...

posted 3y ago by celtschk‭

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...

posted 3y ago by celtschk‭

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...

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by r~~‭

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 ...

2 answers  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by Nick Alexeev‭

If you don't mind the extra memory, you can do it with an extra array: struct basket { char *item_memory; char **items; int itemcount; }; /* I omitted any error handling */ voi...

posted 5mo ago by celtschk‭  ·  last activity 5mo ago by Alexei‭

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...

posted 3y ago by celtschk‭

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...

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by Monica Cellio‭