Questions tagged [standard-library]
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24 questions
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Why is std::dynamic_extent not zero in c++?
For context, I'm trying to make a span type that has a size type parameter, which mimics much of the std::span api.
std::dynamic_extent is not zero in C++, instead being defined as -1ull or std::...
- 1,347
0
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2
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Appropriate design pattern for providing a default Argparse instance, eliminating boilerplate
I'm using argparse.ArgumentParser extensively; however, it comes with a lot of boilerplate to set up, and this is especially noticeable when you've got more than a few common arguments that probably ...
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2
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585
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what algorithm does the malloc function in the c language standard library use? And why it so fast?
Based on the data structure of the AVL tree, I implemented a memory manager that does the best matching according to the size. I originally thought that the speed would be fast and the length of the ...
- 11
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5
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What was the original purpose of C strncpy() function?
C standard library has strncpy function, declared as:
char *strncpy(char *dest, const char *src, size_t n);
It's a strange beast, as it fills n bytes of memory pointed to by dest. It does this by ...
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What is the benefit of Java collection streams over C# or Scala collections?
Java collection streams were introduced in Java 8, which came out in March of 2014.
By that time, we already had well-established mechanisms for manipulating collections in several other languages, ...
- 32.8k
2
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1
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Why did C++11 add find_if() instead of overloading find()?
Why did c++11 add a separate find_if() instead of simply overloading the existing find()?
Wouldn't overloading the function be sufficient?
- 53
0
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1
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Common methods for swapping out a library
I am trying to come up with a solution to replace joda-time with java 8 time in our product. The code-base encompasses many projects of which some import joda-time directly and some transitively. To ...
- 11
32
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Why are standard libraries not programming language primitives? [closed]
I was thinking why are there (in all programming languages I have learned, such as C++, Java, Python) standard libraries like stdlib, instead of having similar "functions" being a primitive of the ...
user327143
2
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1
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How to optimize reusing a large std::unordered_map as a temporary in a frequently called function?
Simplified question with a working example: I want to reuse a std::unordered_map (let's call it umap) multiple times, similar to the following dummy code (which does not do anything meaningful). How ...
- 31
2
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2
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Why do we have to include multiple header files for a single library (the C standard library)?
I am not sure why there are so many header file for the C standard library (stdio.h, stdlib.h, math.h).
How do these header files point to the same library?
I guess I am a little bit confused about ...
- 2,297
3
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2
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Why does Java's getSystemResourceAsStream silently consume IOExceptions?
While trying to debug a weird issue where I knew an exception should have been thrown but was not, I found the following in the Java standard library's java.lang.ClassLoader class:
/**
* Open for ...
- 41
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1
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When was STL formally introduced into C++ standard?
I fail to infer the exact point of historical introduction of STL into actual C++ standard library from the wikipedia article: https://en.wikipedia.org/wiki/Standard_Template_Library
It appears to me ...
3
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4
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878
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Equivalent of C library functions
In C, almost everything requires a function. What nags me is that I don't know exactly what's going on. If there was no msvcrt.dll file, my C programs would all break because that's where all the ...
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684
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Should there be print statements in a library
I have built a library that is being used by a few people. They say that library has a few print statements which is wrong because a library should give freedom to users to use the library the way ...
8
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Why would an interface override methods of the interface(s) it extends in Java 7?
I was looking at Map and SortedMap documentation from Java 7 and I have realized that SortedMap, which extends Map overrides entrySet(), keySet() and values().
AFAIK, interfaces cannot implement a ...
- 1,912