What is the best way to map two values to one key?
ie An item with a value and bool.
Tried using:
std::map<std::string, std::pair<std::string, bool> > myMap2
But that doesn't seem like the correct solution. Is there a more elegant way to do this?
That is indeed the correct solution. More generally, consider using std::tuple
instead of std::pair
for a uniform interface regardless of the number of values (as std::pair
is obviously restricted to two), or boost::tuple
if your compiler is too old to ship with a std::
or std::tr1::
implementation.
Either use std::pair<>
as you did, or make a custom struct containing the values you want to store. I'd do the latter in most cases, as the values then have names more descriptive than first
and second
.
通常,我创建一个简单的mapValue结构/类。
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