Re: Map problem

From:
"Jim Langston" <tazmaster@rocketmail.com>
Newsgroups:
comp.lang.c++
Date:
Fri, 11 Apr 2008 03:48:52 -0700
Message-ID:
<tmHLj.115$zr3.41@newsfe07.lga>
tech wrote:

Hi, I want to create a map of named events from a const array.

eg std::map<std::string, HANDLE> this needs to be intialised so that

initially it will be contain the names of the all the events with a
NULL handle then
i can do the following

std::map<std::string, HANDLE> Events;
std::map<std::string, HANDLE>::iterator it;

const std::string[] { "EventName1", "EventName2", "EventName3"};


I think you meant to give this a name. Something Like:
const std::string EventNames[] { "EventName1", "EventName2", "EventName3"};

it = Events.begin();

while (it != Events.end())
{
 Events[it->first] = CreateEvent(NULL,FALSE,FALSE, it->first.c_str())
 ++it;
}

So i f i ever need a new event all i need to do is add it to the array
and the event will be created
managed, destroyed just using the map.

However do i use the string array to initalise the map keys however?


Simplest would be something like:

for ( int i = 0; i < sizeof( EventNames ) / sizeof( EvenNames[0] ); ++i )
   Events[EventNames[i]] = NULL;

the sizeof( Eventnames ) / sizeof( EventNames[0]] may be a little off. Thsi
just is to determine how many names are in the array.

But really, for a constant array of text I'd just go with a char*[]

const char* EventNames[] = { "EventName1", "EventName2", "EventName3"};

Notice that this isn't using C style char arrays, but an array of character
pointers.

--
Jim Langston
tazmaster@rocketmail.com

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