Results for: "tally"

Evaluates the string or block in the context of mod, except that when a block is given, constant/class variable lookup is not affected. This can be used to add methods to a class. module_eval returns the result of evaluating its argument. The optional filename and lineno parameters set the text for error messages.

class Thing
end
a = %q{def hello() "Hello there!" end}
Thing.module_eval(a)
puts Thing.new.hello()
Thing.module_eval("invalid code", "dummy", 123)

produces:

Hello there!
dummy:123:in `module_eval': undefined local variable
    or method `code' for Thing:Class

Makes new_name a new copy of the method old_name. This can be used to retain access to methods that are overridden.

module Mod
  alias_method :orig_exit, :exit
  def exit(code=0)
    puts "Exiting with code #{code}"
    orig_exit(code)
  end
end
include Mod
exit(99)

produces:

Exiting with code 99

Just returns true. It’s nonsense, but is for symmetry.

Date.valid_jd?(2451944)           #=> true

See also jd.

Returns true if the given calendar date is valid, and false if not.

Date.valid_date?(2001,2,3)        #=> true
Date.valid_date?(2001,2,29)       #=> false

See also jd and civil.

Returns true if the given calendar date is valid, and false if not.

Date.valid_date?(2001,2,3)        #=> true
Date.valid_date?(2001,2,29)       #=> false

See also jd and civil.

Duplicates self and resets its the day of calendar reform.

d = Date.new(1582,10,15)
d.new_start(Date::JULIAN)         #=> #<Date: 1582-10-05 ...>

Returns an array containing the values associated with the given keys.

Calls the block once for each value string in the database. Returns self.

Returns true if the database contains the specified string value, false otherwise.

Returns the struct member values for each selector as an Array. A selector may be either an Integer offset or a Range of offsets (as in Array#values_at).

Customer = Struct.new(:name, :address, :zip)
joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
joe.values_at 0, 2 #=> ["Joe Smith", 12345]

Waits until IO is writable without blocking and returns self or nil when times out.

Returns the Encoding object that represents the encoding of the file. If io is in write mode and no encoding is specified, returns nil.

Returns the Encoding of the internal string if conversion is specified. Otherwise returns nil.

Returns an array of the values associated with each specified key.

Executes block for each key in the database, passing the corresponding value as a parameter.

Returns true if the given value v exists within the database. Returns false otherwise.

Returns true if this class can be used to create an instance from a serialised JSON string. The class has to implement a class method json_create that expects a hash as first parameter. The hash should include the required data.

See FileTest.readable_real?.

See FileTest.world_writable?.

Returns an Array of values corresponding to the given keys.

Iterates over each value in the database.

If no block is given, returns an Enumerator.

Returns true if the database contains the given value.

Returns an Addrinfo object for local address obtained by getsockname.

Note that addrinfo.protocol is filled by 0.

TCPSocket.open("www.ruby-lang.org", 80) {|s|
  p s.local_address #=> #<Addrinfo: 192.168.0.129:36873 TCP>
}

TCPServer.open("127.0.0.1", 1512) {|serv|
  p serv.local_address #=> #<Addrinfo: 127.0.0.1:1512 TCP>
}