Results for: "module_function"

Returns true if the named file exists and is a regular file.

file can be an IO object.

If the file argument is a symbolic link, it will resolve the symbolic link and use the file referenced by the link.

Enables garbage collection, returning true if garbage collection was previously disabled.

GC.disable   #=> false
GC.enable    #=> true
GC.enable    #=> false

Disables garbage collection, returning true if garbage collection was already disabled.

GC.disable   #=> false
GC.disable   #=> true

Returns a string containing the decoding of an RFC-2045-compliant Base64-encoded string str:

s = "VGhpcyBpcyBsaW5lIDEKVGhpcyBpcyBsaW5lIDIK\n"
Base64.decode64(s) # => "This is line 1\nThis is line 2\n"

Non-Base64 characters in str are ignored; see Encoding Character Set above: these include newline characters and characters - and /:

Base64.decode64("\x00\n-_") # => ""

Padding in str (even if incorrect) is ignored:

Base64.decode64("MDEyMzQ1Njc")   # => "01234567"
Base64.decode64("MDEyMzQ1Njc=")  # => "01234567"
Base64.decode64("MDEyMzQ1Njc==") # => "01234567"

Returns true if the file at path new is newer than all the files at paths in array old_list; false otherwise.

Argument new and the elements of old_list should be interpretable as paths:

FileUtils.uptodate?('Rakefile', ['Gemfile', 'README.md']) # => true
FileUtils.uptodate?('Gemfile', ['Rakefile', 'README.md']) # => false

A non-existent file is considered to be infinitely old.

Related: FileUtils.touch.

Returns true if the file at path new is newer than all the files at paths in array old_list; false otherwise.

Argument new and the elements of old_list should be interpretable as paths:

FileUtils.uptodate?('Rakefile', ['Gemfile', 'README.md']) # => true
FileUtils.uptodate?('Gemfile', ['Rakefile', 'README.md']) # => false

A non-existent file is considered to be infinitely old.

Related: FileUtils.touch.

See Thread::Mutex#sleep

Mirror the Prism.dump API by using the serialization API.

Mirror the Prism.lex API by using the serialization API.

Escapes a string so that it can be safely used in a Bourne shell command line. str can be a non-string object that responds to to_s.

Note that a resulted string should be used unquoted and is not intended for use in double quotes nor in single quotes.

argv = Shellwords.escape("It's better to give than to receive")
argv #=> "It\\'s\\ better\\ to\\ give\\ than\\ to\\ receive"

String#shellescape is a shorthand for this function.

argv = "It's better to give than to receive".shellescape
argv #=> "It\\'s\\ better\\ to\\ give\\ than\\ to\\ receive"

# Search files in lib for method definitions
pattern = "^[ \t]*def "
open("| grep -Ern -e #{pattern.shellescape} lib") { |grep|
  grep.each_line { |line|
    file, lineno, matched_line = line.split(':', 3)
    # ...
  }
}

It is the caller’s responsibility to encode the string in the right encoding for the shell environment where this string is used.

Multibyte characters are treated as multibyte characters, not as bytes.

Returns an empty quoted String if str has a length of zero.

Escapes a string so that it can be safely used in a Bourne shell command line. str can be a non-string object that responds to to_s.

Note that a resulted string should be used unquoted and is not intended for use in double quotes nor in single quotes.

argv = Shellwords.escape("It's better to give than to receive")
argv #=> "It\\'s\\ better\\ to\\ give\\ than\\ to\\ receive"

String#shellescape is a shorthand for this function.

argv = "It's better to give than to receive".shellescape
argv #=> "It\\'s\\ better\\ to\\ give\\ than\\ to\\ receive"

# Search files in lib for method definitions
pattern = "^[ \t]*def "
open("| grep -Ern -e #{pattern.shellescape} lib") { |grep|
  grep.each_line { |line|
    file, lineno, matched_line = line.split(':', 3)
    # ...
  }
}

It is the caller’s responsibility to encode the string in the right encoding for the shell environment where this string is used.

Multibyte characters are treated as multibyte characters, not as bytes.

Returns an empty quoted String if str has a length of zero.

Raises a TypeError to prevent duping.

By default, do not retain any state when marshalling.

Serializes obj and all descendant objects. If anIO is specified, the serialized data will be written to it, otherwise the data will be returned as a String. If limit is specified, the traversal of subobjects will be limited to that depth. If limit is negative, no checking of depth will be performed.

class Klass
  def initialize(str)
    @str = str
  end
  def say_hello
    @str
  end
end

(produces no output)

o = Klass.new("hello\n")
data = Marshal.dump(o)
obj = Marshal.load(data)
obj.say_hello  #=> "hello\n"

Marshal can’t dump following objects:

• anonymous Class/Module.

• objects which are related to system (ex: Dir, File::Stat, IO, File, Socket and so on)

• an instance of MatchData, Data, Method, UnboundMethod, Proc, Thread, ThreadGroup, Continuation

• objects which define singleton methods

returns match status of CSI/SS3 sequence and matched length