On Nov 27, Dax Mickelson said:
I am having problems matching ALL possible matches of a string against
another (very large) string. I am doing something like: @LargeArray =
($HugeString =~ m/$Head......../ig); Where $Head is an 8 character
string. (Basically I want to get all 16 character long substrings out of
$HugeString where the first 8 characters match $Head.)
My problem comes about when (for example) I want to match a 16 character
string that starts with AAAAAAAA. Suppose $HugeString=AAAAAAAAAASDFGHJKL
and $Head=AAAAAAAA I want @LargeArray[0]=AAAAAAAAAASDFGHJ,
@LargeArray[1]=AAAAAAAAASDFGHJK, and @LargeArray[2]=AAAAAAAASDFGHJKL
So you want to get OVERLAPPING matches, is that correct? If so, your
problem can be solved with a "look-ahead" assertion:
my @matches = $string =~ /(?=($pattern.{8}))/g;
The look-ahead matches without advancing in the string.
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