stl Archives - IT Nursery

C++, Programming

IT Nursery

Is the order of iterating through std::map known (and guaranteed by the standard)?

What I mean is – we know that the std::map‘s elements are sorted according to the keys. So, let’s say the keys are ...

June 4, 2022
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C++, Programming

IT Nursery

Advantages of std::for_each over for loop

Are there any advantages of std::for_each over for loop? To me, std::for_each only seems to hinder the readability of code. Why do then ...

June 4, 2022
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C++, Programming

IT Nursery

How do I reverse a C++ vector?

Is there a built-in vector function in C++ to reverse a vector in place? Or do you just have to do it manually? ...

June 3, 2022
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C++, Programming

IT Nursery

Why does std::list::reverse have O(n) complexity?

Why does the reverse function for the std::list class in the C++ standard library have linear runtime? I would think that for doubly-linked ...

June 2, 2022
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C++, Programming

IT Nursery

maximum value of int

Is there any code to find the maximum value of integer (accordingly to the compiler) in C/C++ like Integer.MaxValue function in java? 8 ...

June 2, 2022
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C++, Programming

IT Nursery

STL or Qt containers?

What are the pros and cons of using Qt containers (QMap, QVector, etc.) over their STL equivalent? I can see one reason to ...

June 2, 2022
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C++, Programming

IT Nursery

How do I clear the std::queue efficiently?

I am using std::queue for implementing JobQueue class. ( Basically this class process each job in FIFO manner). In one scenario, I want ...

June 1, 2022
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C++, Programming

IT Nursery

When vectors are allocated, do they use memory on the heap or the stack?

Are all of the following statements true? vector<Type> vect; //allocates vect on stack and each of the Type (using std::allocator) also will be ...

June 1, 2022
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C++, Programming

IT Nursery

C++ Double Address Operator? (&&)

I’m reading STL source code and I have no idea what && address operator is supposed to do. Here is a code example ...

May 31, 2022
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C++, Programming

IT Nursery

Throwing the fattest people off of an overloaded airplane.

Let’s say you’ve got an airplane, and it is low on fuel. Unless the plane drops 3000 pounds of passenger weight, it will ...

May 31, 2022
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