How add "Not-match" logic into Enumerable.grep?


#1

Say, I want to get all files in one folder. Since Dir.entries will
have “.” and “…” included. I want to strip them out with “grep”. I
tried to write in such a way as I can did similarly in Perl:
log_files = Dir.entries(log_dir).grep(!/^…?/)
But, it is a syntax error to have “!/regex/” as grep’s argument.

Should I use some trick to make grep accept “not-match” regex?


#2

Hi,

At Tue, 5 Jun 2007 18:55:02 +0900,
Morgan C. wrote in [ruby-talk:254395]:

Say, I want to get all files in one folder. Since Dir.entries will
have “.” and “…” included. I want to strip them out with “grep”. I
tried to write in such a way as I can did similarly in Perl:
log_files = Dir.entries(log_dir).grep(!/^…?/)

grep(/\A(?!..?\z)/)


#3

On 05.06.2007 11:54, Morgan C. wrote:

Say, I want to get all files in one folder. Since Dir.entries will
have “.” and “…” included. I want to strip them out with “grep”. I
tried to write in such a way as I can did similarly in Perl:
log_files = Dir.entries(log_dir).grep(!/^…?/)
But, it is a syntax error to have “!/regex/” as grep’s argument.

Should I use some trick to make grep accept “not-match” regex?

Use #reject:

Dir.entries(".").reject {|x| /\A.+\z/ =~ x}

robert