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Questions - stdmap

What are the downsides to accessing a std::map<std::string, int> using string literals?

I have written a ResourceManager class in C++ that contains a std::map<std::string, Resource>. My current code then accesses these methods using string literals, e.g: // ResourceManager.h class ...
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michael

c++

stdmap

stdstring

string-literals

Votes: 0

Answers: 1

Latest Answer

As with any other situation where magic constants are used, it can lead to brittle code, i.e., code that is likely to become broken. In particular, consider what happens if a "background image&qu...
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Brian Bi

Getting a reference to a std::map in another class - revisited

I have decided to revisit this question (Is it possble to return a reference to a std::map?) because it is not correct for me. My application class has these methods to retreive a map: SpecialEventDat...
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Andrew Truckle

visual-c++

stdmap

Votes: 0

Answers: 0

Is there any way to assign default value to a map passed as a parameter by reference to a function in C++?

I'm trying to use map in my recursive functions (as an implementation of DP). Here, I wrote a simple Fibonacci function (I know I can use a normal array here but I want to get some idea which I can us...
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Rafio MD. Irfanur Rahman

c++

recursion

dynamic-programming

stdmap

memoization

Votes: 0

Answers: 1

Latest Answer

You can simply overload the function: int fib(int n) { std::map<int, int> map; fib(n, map); } int fib(int n, map<int, int> &memo) { ... } Is this what you meant to achive? Side...
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churill

binary comparison not defined when using map&lt;any,any&gt;

I was looking for a way to have a string[] as a map value, and I found this Stack Overflow question. I attempted to use the std::any type to solve my problem, and I got the error binary '<': 'cons...
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greatusername

c++

stdmap

stdany

Votes: 0

Answers: 1

Latest Answer

std::map by default requires that the key type be comparable with <. std::any does not define any operator< and can therefore not be used as key in the map by default. If you really want to use ...
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user17732522

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