Returns the configuration instance variables as a hash, that can be passed to the configure method.
Returns the order of the group.
See the OpenSSL
documentation for EC_GROUP_get_order()
See the OpenSSL
documentation for EC_GROUP_get_degree()
Reads len
bytes from the tar file entry, or the rest of the entry if nil
Rewinds to the beginning of the tar file entry
Topologically sorts the given vertices. @param [Enumerable<Vertex>] vertices the vertices to be sorted, which must
all belong to the same graph.
@return [Array<Vertex>] The sorted vertices.
Resolves the requested dependencies into a {DependencyGraph}, locking to the base dependency graph (if specified) @param [Array] requested an array of ‘requested’ dependencies that the
{#specification_provider} can understand
@param [DependencyGraph,nil] base the base dependency graph to which
dependencies should be 'locked'
Returns the value of the given instance variable, or nil if the instance variable is not set. The @
part of the variable name should be included for regular instance variables. Throws a NameError
exception if the supplied symbol is not valid as an instance variable name. String
arguments are converted to symbols.
class Fred def initialize(p1, p2) @a, @b = p1, p2 end end fred = Fred.new('cat', 99) fred.instance_variable_get(:@a) #=> "cat" fred.instance_variable_get("@b") #=> 99
Sets the instance variable named by symbol to the given object, thereby frustrating the efforts of the class’s author to attempt to provide proper encapsulation. The variable does not have to exist prior to this call. If the instance variable name is passed as a string, that string is converted to a symbol.
class Fred def initialize(p1, p2) @a, @b = p1, p2 end end fred = Fred.new('cat', 99) fred.instance_variable_set(:@a, 'dog') #=> "dog" fred.instance_variable_set(:@c, 'cat') #=> "cat" fred.inspect #=> "#<Fred:0x401b3da8 @a=\"dog\", @b=99, @c=\"cat\">"
Returns true
if the given instance variable is defined in obj. String
arguments are converted to symbols.
class Fred def initialize(p1, p2) @a, @b = p1, p2 end end fred = Fred.new('cat', 99) fred.instance_variable_defined?(:@a) #=> true fred.instance_variable_defined?("@b") #=> true fred.instance_variable_defined?("@c") #=> false
Defines a singleton method in the receiver. The method parameter can be a Proc
, a Method
or an UnboundMethod
object. If a block is specified, it is used as the method body. If a block or a method has parameters, they’re used as method parameters.
class A class << self def class_name to_s end end end A.define_singleton_method(:who_am_i) do "I am: #{class_name}" end A.who_am_i # ==> "I am: A" guy = "Bob" guy.define_singleton_method(:hello) { "#{self}: Hello there!" } guy.hello #=> "Bob: Hello there!" chris = "Chris" chris.define_singleton_method(:greet) {|greeting| "#{greeting}, I'm Chris!" } chris.greet("Hi") #=> "Hi, I'm Chris!"
Passes each grapheme cluster in str to the given block, or returns an enumerator if no block is given. Unlike String#each_char
, this enumerates by grapheme clusters defined by Unicode Standard Annex #29 unicode.org/reports/tr29/
"a\u0300".each_char.to_a.size #=> 2 "a\u0300".each_grapheme_cluster.to_a.size #=> 1
Returns a list of the public instance methods defined in mod. If the optional parameter is false
, the methods of any ancestors are not included.
Returns a list of the protected instance methods defined in mod. If the optional parameter is false
, the methods of any ancestors are not included.
Returns a list of the private instance methods defined in mod. If the optional parameter is false
, the methods of any ancestors are not included.
module Mod def method1() end private :method1 def method2() end end Mod.instance_methods #=> [:method2] Mod.private_instance_methods #=> [:method1]
Returns the Ruby source filename and line number containing first definition of constant specified. If the named constant is not found, nil
is returned. If the constant is found, but its source location can not be extracted (constant is defined in C code), empty array is returned.
inherit specifies whether to lookup in mod.ancestors
(true
by default).
# test.rb: class A C1 = 1 end module M C2 = 2 end class B < A include M C3 = 3 end class A # continuation of A definition end p B.const_source_location('C3') # => ["test.rb", 11] p B.const_source_location('C2') # => ["test.rb", 6] p B.const_source_location('C1') # => ["test.rb", 2] p B.const_source_location('C2', false) # => nil -- don't lookup in ancestors p Object.const_source_location('B') # => ["test.rb", 9] p Object.const_source_location('A') # => ["test.rb", 1] -- note it is first entry, not "continuation" p B.const_source_location('A') # => ["test.rb", 1] -- because Object is in ancestors p M.const_source_location('A') # => ["test.rb", 1] -- Object is not ancestor, but additionally checked for modules p Object.const_source_location('A::C1') # => ["test.rb", 2] -- nesting is supported p Object.const_source_location('String') # => [] -- constant is defined in C code
Removes the definition of the sym, returning that constant’s value.
class Dummy @@var = 99 puts @@var remove_class_variable(:@@var) p(defined? @@var) end
produces:
99 nil
Similar to instance_method, searches public method only.