How to handle an "infinite" IEnumerable?
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by Danvil
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Published on 2010-04-29T19:00:20Z
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2010/04/29
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A trivial example of an "infinite" IEnumerable would be
IEnumerable<int> Numbers() {
int i=0;
while(true) {
yield return i++;
}
}
I know, that
foreach(int i in Numbers().Take(10)) {
Console.WriteLine(i);
}
and
var q = Numbers();
foreach(int i in q.Take(10)) {
Console.WriteLine(i);
}
both work fine (and print out the number 0-9).
But are there any pitfalls when copying or handling expressions like q? Can I rely on the fact, that they are always evaluated "lazy"? Is there any danger to produce an infinite loop?
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