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Welcome to Software Development on Codidact!

Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.

# Posts by Dirk Herrmann‭

32 posts
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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 2y ago by Dirk Herrmann‭  ·  edited 1y ago by Alexei‭

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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 1y ago by Dirk Herrmann‭  ·  edited 1y ago by Dirk Herrmann‭

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

Question prolog
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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 2y ago by Dirk Herrmann‭

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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 2y ago by Dirk Herrmann‭

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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 1y ago by Dirk Herrmann‭  ·  edited 1y ago by Dirk Herrmann‭

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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 1y ago by Dirk Herrmann‭

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

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

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

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

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

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Some thoughts about your design / code (not repeating what was already said by Derek): You have chosen member _observers of class State to be a list, and member function register to append to ...

posted 2y ago by Dirk Herrmann‭

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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 1y ago by Dirk Herrmann‭

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One simple possibility to eliminate a set of lines with precisely known content is to use the patch tool. The below code shows an example shell script. The script calls patch on the file to be mo...

posted 2y ago by Dirk Herrmann‭

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Since your code performs a data base operation, the cost of this operation is likely dominating the execution time. The cost of both a return or an exception may be negligible compared to that ope...

posted 2y ago by Dirk Herrmann‭

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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 2y ago by Dirk Herrmann‭

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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 2y ago by Dirk Herrmann‭

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Update: Distinguished between the general case and cases (as with std::string) where it is known that there are no side effects. In the general case, the substitution of the call to a copy constru...

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

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Well, you still need (placement) new for the implementation of the smart pointers themselves. You would also use it (or malloc) to implement custom allocators, for example: https://www.boost.org/d...

posted 2y ago by Dirk Herrmann‭

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It is undefined according to my reading of the standard (I am referring to the latest public draft). int x; (void)x; In the second line, (void)x is a full expression, but x by itself is alread...

posted 2y ago by Dirk Herrmann‭  ·  edited 1y ago by Dirk Herrmann‭

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Starting with the goals: A naming convention typically aims at supporting several, partly contradictory goals, among which are the following: Compliance with the limitations of the language stan...

posted 1y ago by Dirk Herrmann‭  ·  edited 1y ago by Dirk Herrmann‭

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For the regular expression to only match a full field of hyphens, you have, as others already have explained, to put the ^ anchor at the begin of the regular expression and the \$ anchor at the end ...

posted 2y ago by Dirk Herrmann‭

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Is this a good approach? How can I improve my algorithm? Your code is correct and simple. That is good, and it may be all that is needed. You have received some responses that indicate that ...

posted 2y ago by Dirk Herrmann‭  ·  edited 5mo ago by Dirk Herrmann‭