Results for: "Array.new"

Create a new Ripper object. src must be a String, an IO, or an Object which has gets method.

This method does not starts parsing. See also Ripper#parse and Ripper.parse.

Creates a new socket object.

domain should be a communications domain such as: :INET, :INET6, :UNIX, etc.

socktype should be a socket type such as: :STREAM, :DGRAM, :RAW, etc.

protocol is optional and should be a protocol defined in the domain. If protocol is not given, 0 is used internally.

Socket.new(:INET, :STREAM) # TCP socket
Socket.new(:INET, :DGRAM)  # UDP socket
Socket.new(:UNIX, :STREAM) # UNIX stream socket
Socket.new(:UNIX, :DGRAM)  # UNIX datagram socket

returns a new instance of Addrinfo. The instance contains sockaddr, family, socktype, protocol. sockaddr means struct sockaddr which can be used for connect(2), etc. family, socktype and protocol are integers which is used for arguments of socket(2).

sockaddr is specified as an array or a string. The array should be compatible to the value of IPSocket#addr or UNIXSocket#addr. The string should be struct sockaddr as generated by Socket.sockaddr_in or Socket.unpack_sockaddr_un.

sockaddr examples:

• ["AF_INET", 46102, "localhost.localdomain", "127.0.0.1"]

• ["AF_INET6", 42304, "ip6-localhost", "::1"]

• ["AF_UNIX", "/tmp/sock"]

• Socket.sockaddr_in("smtp", "2001:DB8::1")

• Socket.sockaddr_in(80, "172.18.22.42")

• Socket.sockaddr_in(80, "www.ruby-lang.org")

• Socket.sockaddr_un("/tmp/sock")

In an AF_INET/AF_INET6 sockaddr array, the 4th element, numeric IP address, is used to construct socket address in the Addrinfo instance. If the 3rd element, textual host name, is non-nil, it is also recorded but used only for Addrinfo#inspect.

family is specified as an integer to specify the protocol family such as Socket::PF_INET. It can be a symbol or a string which is the constant name with or without PF_ prefix such as :INET, :INET6, :UNIX, “PF_INET”, etc. If omitted, PF_UNSPEC is assumed.

socktype is specified as an integer to specify the socket type such as Socket::SOCK_STREAM. It can be a symbol or a string which is the constant name with or without SOCK_ prefix such as :STREAM, :DGRAM, :RAW, “SOCK_STREAM”, etc. If omitted, 0 is assumed.

protocol is specified as an integer to specify the protocol such as Socket::IPPROTO_TCP. It must be an integer, unlike family and socktype. If omitted, 0 is assumed. Note that 0 is reasonable value for most protocols, except raw socket.

Creates a new UDPSocket object.

address_family should be an integer, a string or a symbol: Socket::AF_INET, “AF_INET”, :INET, etc.

require 'socket'

UDPSocket.new                   #=> #<UDPSocket:fd 3>
UDPSocket.new(Socket::AF_INET6) #=> #<UDPSocket:fd 4>

Creates a new server socket bound to port.

If hostname is given, the socket is bound to it.

serv = TCPServer.new("127.0.0.1", 28561)
s = serv.accept
s.puts Time.now
s.close

Internally, TCPServer.new calls getaddrinfo() function to obtain addresses. If getaddrinfo() returns multiple addresses, TCPServer.new tries to create a server socket for each address and returns first one that is successful.

Creates a new UNIX server socket bound to path.

require 'socket'

serv = UNIXServer.new("/tmp/sock")
s = serv.accept
p s.read

Opens a SOCKS connection to host via the SOCKS server.

The SOCKS server configuration varies by implementation

When using the Dante libsocks/libsocksd implementation it is configured as SOCKS_SERVER env var.

See: manpages.debian.org/testing/dante-client/socksify.1.en.html for full env variable support.

Opens a TCP connection to remote_host on remote_port. If local_host and local_port are specified, then those parameters are used on the local end to establish the connection.

:connect_timeout

specify the timeout in seconds.

Creates a new UNIX client socket connected to path.

require 'socket'

s = UNIXSocket.new("/tmp/sock")
s.send "hello", 0

Note that mode defaults to 'r' if string is frozen.

Returns a new StringIO instance formed from string and mode; see Access Modes:

strio = StringIO.new # => #<StringIO>
strio.close

The instance should be closed when no longer needed.

Related: StringIO.open (accepts block; closes automatically).

Creates a new StringScanner object to scan over the given string.

If fixed_anchor is true, \A always matches the beginning of the string. Otherwise, \A always matches the current position.

dup argument is obsolete and not used now.

Returns a new WIN32OLE object(OLE Automation object). The first argument server specifies OLE Automation server. The first argument should be CLSID or PROGID. If second argument host specified, then returns OLE Automation object on host. If :license keyword argument is provided, IClassFactory2::CreateInstanceLic is used to create instance of licensed server.

WIN32OLE.new('Excel.Application') # => Excel OLE Automation WIN32OLE object.
WIN32OLE.new('{00024500-0000-0000-C000-000000000046}') # => Excel OLE Automation WIN32OLE object.

Returns a new BasicObject.

Returns a new empty Hash object.

The initial default value and initial default proc for the new hash depend on which form above was used. See Default Values.

If neither an argument nor a block given, initializes both the default value and the default proc to nil:

h = Hash.new
h.default # => nil
h.default_proc # => nil

If argument default_value given but no block given, initializes the default value to the given default_value and the default proc to nil:

h = Hash.new(false)
h.default # => false
h.default_proc # => nil

If a block given but no argument, stores the block as the default proc and sets the default value to nil:

h = Hash.new {|hash, key| "Default value for #{key}" }
h.default # => nil
h.default_proc.class # => Proc
h[:nosuch] # => "Default value for nosuch"

Returns the new CSV object created using string or io and the specified options.

• Argument string should be a String object; it will be put into a new StringIO object positioned at the beginning.

• Argument io should be an IO object that is:

  • Open for reading; on return, the IO object will be closed.

  • Positioned at the beginning. To position at the end, for appending, use method CSV.generate. For any other positioning, pass a preset StringIO object instead.

• Argument options: See:

  • Options for Parsing

  • Options for Generating

  For performance reasons, the options cannot be overridden in a CSV object, so those specified here will endure.

In addition to the CSV instance methods, several IO methods are delegated. See Delegated Methods.

Create a CSV object from a String object:

csv = CSV.new('foo,0')
csv # => #<CSV io_type:StringIO encoding:UTF-8 lineno:0 col_sep:"," row_sep:"\n" quote_char:"\"">

Create a CSV object from a File object:

File.write('t.csv', 'foo,0')
csv = CSV.new(File.open('t.csv'))
csv # => #<CSV io_type:File io_path:"t.csv" encoding:UTF-8 lineno:0 col_sep:"," row_sep:"\n" quote_char:"\"">

Raises an exception if the argument is nil:

# Raises ArgumentError (Cannot parse nil as CSV):
CSV.new(nil)

Pass in the obj to delegate method calls to. All methods supported by obj will be delegated to.

Creates a new ACL from list with an evaluation order of DENY_ALLOW or ALLOW_DENY.

An ACL list is an Array of “allow” or “deny” and an address or address mask or “all” or “*” to match any address:

%w[
  deny all
  allow 192.0.2.2
  allow 192.0.2.128/26
]

Constructs a new ERB object with the template specified in str.

An ERB object works by building a chunk of Ruby code that will output the completed template when run.

If trim_mode is passed a String containing one or more of the following modifiers, ERB will adjust its code generation as listed:

%  enables Ruby code processing for lines beginning with %
<> omit newline for lines starting with <% and ending in %>
>  omit newline for lines ending in %>
-  omit blank lines ending in -%>

eoutvar can be used to set the name of the variable ERB will build up its output in. This is useful when you need to run multiple ERB templates through the same binding and/or when you want to control where output ends up. Pass the name of the variable to be used inside a String.

Example

require "erb"

# build data class
class Listings
  PRODUCT = { :name => "Chicken Fried Steak",
              :desc => "A well messages pattie, breaded and fried.",
              :cost => 9.95 }

  attr_reader :product, :price

  def initialize( product = "", price = "" )
    @product = product
    @price = price
  end

  def build
    b = binding
    # create and run templates, filling member data variables
    ERB.new(<<-'END_PRODUCT'.gsub(/^\s+/, ""), trim_mode: "", eoutvar: "@product").result b
      <%= PRODUCT[:name] %>
      <%= PRODUCT[:desc] %>
    END_PRODUCT
    ERB.new(<<-'END_PRICE'.gsub(/^\s+/, ""), trim_mode: "", eoutvar: "@price").result b
      <%= PRODUCT[:name] %> -- <%= PRODUCT[:cost] %>
      <%= PRODUCT[:desc] %>
    END_PRICE
  end
end

# setup template data
listings = Listings.new
listings.build

puts listings.product + "\n" + listings.price

Generates

Chicken Fried Steak
A well messages pattie, breaded and fried.

Chicken Fried Steak -- 9.95
A well messages pattie, breaded and fried.

Returns a new GetoptLong object based on the given arguments. See Options.

Example:

require 'getoptlong'

options = GetoptLong.new(
  ['--number', '-n', GetoptLong::REQUIRED_ARGUMENT],
  ['--verbose', '-v', GetoptLong::OPTIONAL_ARGUMENT],
  ['--help', '-h', GetoptLong::NO_ARGUMENT]
)

Raises an exception if:

• Any of arguments is not an array.

• Any option name or alias is not a string.

• Any option type is invalid.

Creates a new ipaddr object either from a human readable IP address representation in string, or from a packed in_addr value followed by an address family.

In the former case, the following are the valid formats that will be recognized: “address”, “address/prefixlen” and “address/mask”, where IPv6 address may be enclosed in square brackets (‘[’ and ‘]’). If a prefixlen or a mask is specified, it returns a masked IP address. Although the address family is determined automatically from a specified string, you can specify one explicitly by the optional second argument.

Otherwise an IP address is generated from a packed in_addr value and an address family.

The IPAddr class defines many methods and operators, and some of those, such as &, |, include? and ==, accept a string, or a packed in_addr value instead of an IPAddr object.

Creates a new XMP object.

The top-level binding or, optional bind parameter will be used when creating the workspace. See WorkSpace.new for more information.

This uses the :XMP prompt mode, see Customizing the IRB Prompt at IRB for full detail.

With the single argument logdev, returns a new logger with all default options:

Logger.new('t.log') # => #<Logger:0x000001e685dc6ac8>

Argument logdev must be one of:

• A string filepath: entries are to be written to the file at that path; if the file at that path exists, new entries are appended.

• An IO stream (typically +$stdout+, +$stderr+. or an open file): entries are to be written to the given stream.

• nil or File::NULL: no entries are to be written.

Examples:

Logger.new('t.log')
Logger.new($stdout)

The keyword options are:

• level: sets the log level; default value is Logger::DEBUG. See Log Level:

  Logger.new('t.log', level: Logger::ERROR)
  

• progname: sets the default program name; default is nil. See Program Name:

  Logger.new('t.log', progname: 'mung')
  

• formatter: sets the entry formatter; default is nil. See formatter=.

• datetime_format: sets the format for entry timestamp; default is nil. See datetime_format=.

• binmode: sets whether the logger writes in binary mode; default is false.

• shift_period_suffix: sets the format for the filename suffix for periodic log file rotation; default is '%Y%m%d'. See Periodic Rotation.

Initializes the instance and yields itself if called with a block.

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Pushes a new List.