catalog . PCRE Introduction . pcre2api . pcre2jit . PCRE Programing 1. PCRE Introduction The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native…
Candidate Elimination Thanks for Sanketh Vedula. This is a good demo to understand candidate elimination algorithm that I have optimized based on this guy's good work. rika@rika-UX303UB$ ./a.out <Input> Number of Features: <Input> Number of At…
脚本这种东西,就是要常用,否则一段时间不用就生疏了,因此决定时时记一些小知识点,一来回顾一下,二来需要的时候可以迅速获得提示. Sort by number You could now write a numeric sort subroutine like this: sub by_number { # a sort subroutine, expect $a and $b } } } } To use the sort subroutine, just put its name (witho…
If you omit the control varibele from the beiginning of foreach loop, Perl uses its favrorite default variable $_. This is (mostly) just like any other scalar variable, except for its unusual name. For example: ..) { #use $_ by default print "I can c…
http://how-to.linuxcareer.com/learning-linux-commands-awk 1. Introduction In this case, the title might be a little misleading. And that is because awk is more than a command, it's a programming language in its own right. You can write awk scripts fo…
on Jun 20, 2019 at 11:39 UTC ( #11101620=perlquestion: print w/replies, xml ) Need Help?? jimyokl has asked for the wisdom of the Perl Monks concerning the following question: Reputation: 5 Edit I just started learning Perl for several days.I sow som…
Today when taking a bath I got a good idea that it is an efficient and interesting way to learn a new programming language: (These days I learn Python from the Python manual and feel a little bored....) Learn programming by trying some little or larg…
