passing through all elements in hash

[mahurshi]

i have a big hash like the following

map<string, int> TESTHASH;

how do i pass through each key of the hash and get its value ?

kinda like foreach(keys(%TESTHASH)) in perl

but how do i go about this in c++ ?

i already populated my hash and i am able to pull out the values with
the keys, but in this case, i dont know the keys and i want c++ to
figure that out for me.. but i dont know how to figure this out :-)

thanks

[mlimber]

[e-mail] wrote:

i have a big hash like the following

map<string, int> TESTHASH;

how do i pass through each key of the hash and get its value ?

kinda like foreach(keys(%TESTHASH)) in perl

but how do i go about this in c++ ?

i already populated my hash and i am able to pull out the values with
the keys, but in this case, i dont know the keys and i want c++ to
figure that out for me.. but i dont know how to figure this out :-)

thanks

You can iterate through the container and print the keys thusly:

for( map<string,int>::const_iterator i=TESTHASH.begin();
i != TESTHASH.end();
++i )
{
cout << i->first << endl;
}

Cheers! --M

[mahurshi]

aah.. perfect

i->second is giving me the value for that key (just did some
experimenting and it worked) :-)

thanks

[John Harrison]

ma******@gmail.com wrote:

aah.. perfect

i->second is giving me the value for that key (just did some
experimenting and it worked) :-)

thanks

Not it isn't, you've got your key and your value mixed up.

In this

map<string, int>

The string is the key and the int is the value.

john

[mahurshi]

oh.. i really meant the same thing

i->first ==> key (string)

i->second ==> "value for that key" (int)
John Harrison wrote:

ma******@gmail.com wrote:

aah.. perfect

i->second is giving me the value for that key (just did some
experimenting and it worked) :-)

thanks

Not it isn't, you've got your key and your value mixed up.

In this

map<string, int>

The string is the key and the int is the value.

john