Re: any better explanation of look ahead assertions

2018-05-10 Thread ToddAndMargo
On 05/10/2018 07:12 PM, Brad Gilbert wrote: On Thu, May 10, 2018 at 9:09 PM, ToddAndMargo wrote: On 05/10/2018 07:06 PM, Brad Gilbert wrote: You could read how they work in PCRE What is PCRE? Perl Compatible Regular Expressions, Basically someone reimplemented

Re: any better explanation of look ahead assertions

2018-05-10 Thread Brad Gilbert
On Thu, May 10, 2018 at 9:09 PM, ToddAndMargo wrote: > On 05/10/2018 07:06 PM, Brad Gilbert wrote: >> >> You could read how they work in PCRE > > > What is PCRE? Perl Compatible Regular Expressions, Basically someone reimplemented the regular expression engine found in

Re: any better explanation of look ahead assertions

2018-05-10 Thread ToddAndMargo
On 05/10/2018 07:06 PM, Brad Gilbert wrote: You could read how they work in PCRE What is PCRE?

Re: any better explanation of look ahead assertions

2018-05-10 Thread Brad Gilbert
On Thu, May 10, 2018 at 8:13 PM, ToddAndMargo wrote: > Hi All, > > Looking at: > https://docs.perl6.org/language/regexes#Lookahead_Assertions > https://docs.perl6.org/language/regexes#Lookbehind_assertions > > I can't tell heads from tails. Does anyone know of a

any better explanation of look ahead assertions

2018-05-10 Thread ToddAndMargo
Hi All, Looking at: https://docs.perl6.org/language/regexes#Lookahead_Assertions https://docs.perl6.org/language/regexes#Lookbehind_assertions I can't tell heads from tails. Does anyone know of a better reference/explanation for beginners? Many thanks, -T