Hi,

I see that in API of String there is no findAll(substring str) which returns all the indexs of str in a string.

Is it possible to include in future release? I think this is useful.

If not, how can I implement it?

Thanks in advance, Xan.

Doesn't seem like something I've ever really encountered. What is your use case?

To implement yourself you can do this:

str := "abc abc abc"
indices := Int[,]
Int? i := -1
while (true)
{
  i = str.index("abc", i+1)
  if (i == null) break
  indices.add(i)
}
echo(indices)

Thank you very much Brian. My case is to search all links in one web page, that is search string "<a href=" in web page string (very large string).

Do you recommend this code or use Buffer?

Thanks a lot, a lot, Xan.

Likely Regex and RegexMatcher can work for you...

indices := Int[,]
str := "a very long string to look for words in"

regex := Regex("[a-z]+")
matcher := regex.matcher(str)
while (matcher.find) {
  indices.add(matcher.start)
}
echo(indices)

gives

[0, 2, 7, 12, 19, 22, 27, 31, 37]

Do you recommend this code or use Buffer?

Well an in-memory string is probably simplest and fine.

If I was doing this for production software, I'd probably use a real HTML parsing library or write one myself (knowing me I'd write one myself because I love that sort of thing :-)

Thank you Kevin. Definitely RegexMatcher is the tool I need ;-)

Thanks also Brian for suggestion about performance.