Results for: "Data"

See FileTest.world_writable?.

See FileTest.writable_real?.

Returns true for IPv4 private address (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). It returns false otherwise.

Returns true for IPv4-compatible IPv6 address (::/80). It returns false otherwise.

Returns the socket path as a string.

Addrinfo.unix("/tmp/sock").unix_path       #=> "/tmp/sock"

Returns the size of the most recent match in bytes, or nil if there was no recent match. This is different than matched.size, which will return the size in characters.

s = StringScanner.new('test string')
s.check /\w+/           # -> "test"
s.matched_size          # -> 4
s.check /\d+/           # -> nil
s.matched_size          # -> nil

Returns the pre-match

s = StringScanner.new('test string')
s.scan(/\w+/)           # -> "test"
s.scan(/\s+/)           # -> " "
s.pre_match             # -> "test"
s.post_match            # -> "string"

Returns the post-match

s = StringScanner.new('test string')
s.scan(/\w+/)           # -> "test"
s.scan(/\s+/)           # -> " "
s.pre_match             # -> "test"
s.post_match            # -> "string"

Returns the subgroups in the most recent match at the given indices. If nothing was priorly matched, it returns nil.

s = StringScanner.new("Fri Dec 12 1975 14:39")
s.scan(/(\w+) (\w+) (\d+) /)       # -> "Fri Dec 12 "
s.values_at 0, -1, 5, 2            # -> ["Fri Dec 12 ", "12", nil, "Dec"]
s.scan(/(\w+) (\w+) (\d+) /)       # -> nil
s.values_at 0, -1, 5, 2            # -> nil

Creates GUID.

WIN32OLE.create_guid # => {1CB530F1-F6B1-404D-BCE6-1959BF91F4A8}

Evaluates a string containing Ruby source code, or the given block, within the context of the receiver (obj). In order to set the context, the variable self is set to obj while the code is executing, giving the code access to obj’s instance variables and private methods.

When instance_eval is given a block, obj is also passed in as the block’s only argument.

When instance_eval is given a String, the optional second and third parameters supply a filename and starting line number that are used when reporting compilation errors.

class KlassWithSecret
  def initialize
    @secret = 99
  end
  private
  def the_secret
    "Ssssh! The secret is #{@secret}."
  end
end
k = KlassWithSecret.new
k.instance_eval { @secret }          #=> 99
k.instance_eval { the_secret }       #=> "Ssssh! The secret is 99."
k.instance_eval {|obj| obj == self } #=> true

Executes the given block within the context of the receiver (obj). In order to set the context, the variable self is set to obj while the code is executing, giving the code access to obj’s instance variables. Arguments are passed as block parameters.

class KlassWithSecret
  def initialize
    @secret = 99
  end
end
k = KlassWithSecret.new
k.instance_exec(5) {|x| @secret+x }   #=> 104

Returns a new Array containing values for the given keys:

h = {foo: 0, bar: 1, baz: 2}
h.values_at(:baz, :foo) # => [2, 0]

The default values are returned for any keys that are not found:

h.values_at(:hello, :foo) # => [nil, 0]

Returns an Array containing the environment variable values associated with the given names:

ENV.replace('foo' => '0', 'bar' => '1', 'baz' => '2')
ENV.values_at('foo', 'baz') # => ["0", "2"]

Returns nil in the Array for each name that is not an ENV name:

ENV.values_at('foo', 'bat', 'bar', 'bam') # => ["0", nil, "1", nil]

Returns an empty Array if no names given.

Raises an exception if any name is invalid. See Invalid Names and Values.

Returns the String created by generating CSV from ary using the specified options.

Argument ary must be an Array.

Special options:

• Option :row_sep defaults to "\n"> on Ruby 3.0 or later and <tt>$INPUT_RECORD_SEPARATOR ($/) otherwise.:

  $INPUT_RECORD_SEPARATOR # => "\n"
  

• This method accepts an additional option, :encoding, which sets the base Encoding for the output. This method will try to guess your Encoding from the first non-nil field in row, if possible, but you may need to use this parameter as a backup plan.

For other options, see Options for Generating.

Returns the String generated from an Array:

CSV.generate_line(['foo', '0']) # => "foo,0\n"

Raises an exception if ary is not an Array:

# Raises NoMethodError (undefined method `find' for :foo:Symbol)
CSV.generate_line(:foo)

Returns the String created by generating CSV from using the specified options.

Argument rows must be an Array of row. Row is Array of String or CSV::Row.

Special options:

• Option :row_sep defaults to "\n" on Ruby 3.0 or later and $INPUT_RECORD_SEPARATOR ($/) otherwise.:

  $INPUT_RECORD_SEPARATOR # => "\n"
  

• This method accepts an additional option, :encoding, which sets the base Encoding for the output. This method will try to guess your Encoding from the first non-nil field in row, if possible, but you may need to use this parameter as a backup plan.

For other options, see Options for Generating.

Returns the String generated from an

CSV.generate_lines([['foo', '0'], ['bar', '1'], ['baz', '2']]) # => "foo,0\nbar,1\nbaz,2\n"

Raises an exception

# Raises NoMethodError (undefined method `each' for :foo:Symbol)
CSV.generate_lines(:foo)

Adds list of ACL entries to this ACL.

Returns true if the ipaddr is an IPv4-compatible IPv6 address.

Returns a new ipaddr built by converting the native IPv4 address into an IPv4-compatible IPv6 address.

Returns the Ruby source filename and line number of the binding object.