I'd like to count the matches of a regex in a string with Rust. I managed to print all matches:
let re = Regex::new(r"(?i)foo").unwrap();
let result = re.find_iter("This is foo and FOO foo as well as FoO.");
for i in result {
println!("{}", i.as_str())
}
But I fail to simply get the number of matches. I can't find any function that gives me the count. I also tried size_hint()
, but that does not work as well. Any way I can do that?
Here is the Scala version of what I'm looking for.
你已经有了迭代器,所以只计算迭代器中的元素数量:
re.find_iter("This is foo and FOO foo as well as FoO.").count()
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