How to get data out of the STL's const_iterator?

How to get data out of the STL's const_iterator?

By : user3849758
Date : October 21 2020, 11:12 PM
Does that help Iterators have an interface that "looks" like a pointer (but they are not necessarily pointers, so don't take this metaphor too far).
An iterator represents a reference to a single piece of data in a container. What you want is to access the contents of the container at the position designated by the iterator. You can access the contents at position it using *it. Similarly, you can call methods on the contents at position it (if the contents are an object) using it->method().
code :

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DLLs and STLs and static data (oh my!)

DLLs and STLs and static data (oh my!)

By : A Smit
Date : March 29 2020, 07:55 AM
will be helpful for those in need We successfully pass STL objects around in our application which is made up from dozens of DLLs. To ensure it works one of our automated tests that runs at every build is to verify the settings for all projects. If you add a new project and misconfigure it, or break the configuration of an existing project, the build fails.
The settings we check are as follows. Note not all of these will cause issues, but we check them for consistency.
code :
Do all C++ STLs produce the same random numbers (for the same seed)?

Do all C++ STLs produce the same random numbers (for the same seed)?

By : user3101909
Date : March 29 2020, 07:55 AM
Any of those help No, the standard does not require a specific implementation. Also, the only standard way to get random numbers are rand and srand, and they are not part of what originally was the STL, but rather functions taken over from C.
public: typedef other_class::const_iterator my_class::const_iterator - acceptable?

public: typedef other_class::const_iterator my_class::const_iterator - acceptable?

By : user3510174
Date : March 29 2020, 07:55 AM
hope this fix your issue Have a look at other C++ Standard Library container adapters like std::queue. std::queue is just an adapter on top of an underlying container (by default a std::deque).
This is exactly the method used in those adapters. Given that, I would say your implementation is fine.
const_iterator and constness of const_iterator::value_type

const_iterator and constness of const_iterator::value_type

By : Kirt Scott
Date : March 29 2020, 07:55 AM
Hope that helps Why in STL , It allows me to do this:
code :
std::iterator_traits<I>::value_type val = *iter;
val += 5;
const std::iterator_traits<I>::value_type cval = *iter;
std::iterator_traits<I>::reference        ref  = *iter;
How to achieve the map concept in C without using C++ STLs

How to achieve the map concept in C without using C++ STLs

By : bjr3ady
Date : March 29 2020, 07:55 AM
help you fix your problem All you really need to do is define a struct that contains at least members for your key and value, and then define a container that can hold multiple of that struct. The container just needs to support three basic operations: Insert, Remove, and Find.
Almost any sort of data structure will do, but with different tradeoffs between easy implementation and efficiency. Some of the most likely options are:
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