Dirk Herrmann‭

What if a question is beginner level? I would say: Someone should answer it. Some of the beginner level questions on stackoverflow have received answers that explain things in wonderful ways. Be...

posted 3y ago by Dirk Herrmann‭  ·  edited 2y ago by Alexei‭

There is one thing to clarify when mapping a float interval to an integer interval, namely how the boundaries of the float interval shall be mapped to the boundaries of the integer interval. Takin...

posted 2y ago by Dirk Herrmann‭  ·  edited 2y ago by Dirk Herrmann‭

Assume this trivial logic puzzle which I have made up: There are three boys, Fred, John and Max. No two of the boys have the same age. Max is older than John. Fred is not the oldest one. Quest...

0 answers  ·  posted 3y ago by Dirk Herrmann‭  ·  edited 3y ago by Dirk Herrmann‭

As @Quasímodo‭ has shown, the search pattern \(abc.*\)\@<!bird\|bird\(.*xyz\)\@! solves your problem. But, why does it work, and why does your original approach not work? What you want to achi...

posted 3y ago by Dirk Herrmann‭

grep is not the right tool for your case. You can use basename: basename a/b/c --> c basename a/b/c/ --> c or, in your case basename branches/features/arm_and_musl --> arm_...

posted 3y ago by Dirk Herrmann‭

What does ptr() mean in this code? An expression like ptr followed by parentheses as in ptr() is a function call. In your example, ptr is a variable of type "pointer to function" because of t...

posted 3y ago by Dirk Herrmann‭  ·  edited 3y ago by Dirk Herrmann‭

I like the idea, but more as an exercise or a demonstration what can be done with Python. I also like that the code comes with a set of test cases which are written in a way that they nicely serve...

posted 3y ago by Dirk Herrmann‭

Note: This answer was written for a version of the question that focused on getting rid of the if-else, rather than on an explanation of the workings of the recursive tree-traversal. One way of ge...

posted 3y ago by Dirk Herrmann‭  ·  edited 3y ago by Dirk Herrmann‭

To understand the concept of recursive tree traversal, I would like to give you an analogy. Imagine a labyrinth of rooms connected like a tree structure. That is, there is an entry to the first r...

posted 3y ago by Dirk Herrmann‭  ·  edited 3y ago by Dirk Herrmann‭

The concept that is important to understand here is the concept of operator precedence. Assume you have an expression a + b * c. What does it mean? You could have the following options: (a + b) ...

posted 3y ago by Dirk Herrmann‭  ·  edited 3y ago by Dirk Herrmann‭

The way your code handles the variable i within the for loop seems to indicate a wrong understanding of the meaning of for i in range(1,n+2): range(1,n+2) will provide an object of type range. ...

posted 3y ago by Dirk Herrmann‭  ·  edited 3y ago by Dirk Herrmann‭

The expectation for all posts is, that a post is always understood as the own work of the poster, who has the copyright and responsibility for it and offers it to the site according to the site's c...

posted 2y ago by Dirk Herrmann‭

From your description ... I have text (xml actually) files. Some files contain 'foo', some contain 'bar', some contain neither and some contain both. It's the both I'm interested in. ... I co...

posted 2y ago by Dirk Herrmann‭  ·  edited 2y ago by Dirk Herrmann‭

To extend a bit on some points already mentioned: Regarding where to add checks on a case by case basis: If you have a static code analysis tool that can give you information about areas where pro...

posted 3y ago by Dirk Herrmann‭

I see it such that it is undefined behavior (I refer to N1570 as the OP https://port70.net/~nsz/c/c11/n1570.html): After free(p), the lifetime of the object pointed to has ended (7.22.3p1: "The li...

posted 2y ago by Dirk Herrmann‭