glob(p1, p2 = v2) public

Returns the filenames found by expanding pattern which is an Array of the patterns or the pattern String, either as an array or as parameters to the block. Note that this pattern is not a regexp (it’s closer to a shell glob). See File::fnmatch for the meaning of the flags parameter. Note that case sensitivity depends on your system (so File::FNM_CASEFOLD is ignored), as does the order in which the results are returned.


Matches any file. Can be restricted by

other values in the glob. *
will match all files; c* will
match all files beginning with
c; *c will match
all files ending with c; and
\*c\* will match all files that
have c in them (including at
the beginning or end). Equivalent to
/ .* /x in regexp. Note, this
will not match Unix-like hidden files (dotfiles).
In order to include those in the match results,
you must use something like "{*,.*}".


Matches directories recursively.


Matches any one character. Equivalent to

/.{1}/ in regexp.


Matches any one character in set.

Behaves exactly like character sets in
Regexp, including set negation


Matches either literal p or

literal q. Matching literals
may be more than one character in length.
More than two literals may be specified.
Equivalent to pattern alternation in


Escapes the next metacharacter.

Note that this means you cannot use backslash in windows
as part of a glob, i.e. Dir["c:\\foo*"] will not work
use Dir["c:/foo*"] instead
Dir["config.?"]                     #=> ["config.h"]
Dir.glob("config.?")                #=> ["config.h"]
Dir.glob("*.[a-z][a-z]")            #=> ["main.rb"]
Dir.glob("*.[^r]*")                 #=> ["config.h"]
Dir.glob("*.{rb,h}")                #=> ["main.rb", "config.h"]
Dir.glob("*")                       #=> ["config.h", "main.rb"]
Dir.glob("*", File::FNM_DOTMATCH)   #=> [".", "..", "config.h", "main.rb"]

rbfiles = File.join("**", "*.rb")
Dir.glob(rbfiles)                   #=> ["main.rb",
                                    #    "lib/song.rb",
                                    #    "lib/song/karaoke.rb"]
libdirs = File.join("**", "lib")
Dir.glob(libdirs)                   #=> ["lib"]

librbfiles = File.join("**", "lib", "**", "*.rb")
Dir.glob(librbfiles)                #=> ["lib/song.rb",
                                    #    "lib/song/karaoke.rb"]

librbfiles = File.join("**", "lib", "*.rb")
Dir.glob(librbfiles)                #=> ["lib/song.rb"]
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June 28, 2017
0 thanks

Faker Gem: Fake Data Generation in Ruby

Gems are libraries in Rails that generally enable you to write the application code faster and thereby making a great product in far lesser time. Usually, whenever we start developing any application, there comes a point when we need data which we can use to see how the application will behave while doing some load testing or how it would look when we deploy it to the production. The manual process of creating the data can be daunting. Faker gem serves to take this pain away by generating the fake data just as needed and saving us all the time and effort otherwise wasted in the manual process of data-generation.

It can generate almost any kind of data suitable for our application. For example, it can generate the fake data for fields such as name, email, passwords, phone-numbers, paragraphs, etc. It is therefore, an awesome way of populating the model (which is a database layer in Rails)

Let’s take a look at this gem by creating a sample project. Read More: http://www.railscarma.com/blog/technical-articles/faker-gem-fake-data-generation-ruby/

October 20, 2009
2 thanks

Getting relative path from absolute globbing

Say you want to scan for files in directory base_dir and you want to use the relative path from this base dir, you could do it like this:

base_dir = '/path/to/dir'
files = Dir[File.join(base_dir, '**', '*.yml')]

# files now contain absolute paths:
files.first # => "/path/to/dir/foo/bar.yml"

# let's make them relative
base_pathname = Pathname.new(base_dir)
files = files.collect do |file|

files.first # => "foo/bar.yml"

Of course, a more common use-case could be the following:

def scan_for_documents!
  base_path = Pathname.new(self.base_path)
  self.contained_files = []
  Dir[File.join(self.base_path, '**', '*.pdf')].each do |full_path|
    path = Pathname.new(full_path).relative_path_from(base_path)
    self.contained_files << path
August 19, 2011
0 thanks

Alternative way to show relative paths from absolute globbing

An alternative to show relative paths is using the well known String#sub! method

base_dir = File.expand_path("my_dir") << "/" # don't miss adding "/"
files = Dir[File.join(base_dir, '**', '*.html.gz')]
p files.map {|f| f.sub!(base_dir,"")}
May 2, 2017
0 thanks

And yet another way to get relative path from absolute globbing

If you execute glob within a block passed to Dir.chdir, you get the paths relative to the directory specified by Dir.chdir… like this…

base_dir = '/path/to/dir'
files = Dir.chdir(base_dir) do
files.first # => 'foo/bar.yml'