Processes the topmost available {RequirementState} on the stack @return [void]
Writes data
onto the IO
, raising a FileOverflow
exception if the number of bytes will be more than limit
Writes data
onto the IO
Re-composes a prime factorization and returns the product.
See Prime#int_from_prime_division
for more details.
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 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
Returns the value of the given class variable (or throws a NameError
exception). The @@
part of the variable name should be included for regular class variables. String
arguments are converted to symbols.
class Fred @@foo = 99 end Fred.class_variable_get(:@@foo) #=> 99
Sets the class variable named by symbol to the given object. If the class variable name is passed as a string, that string is converted to a symbol.
class Fred @@foo = 99 def foo @@foo end end Fred.class_variable_set(:@@foo, 101) #=> 101 Fred.new.foo #=> 101
Returns true
if the given class variable is defined in obj. String
arguments are converted to symbols.
class Fred @@foo = 99 end Fred.class_variable_defined?(:@@foo) #=> true Fred.class_variable_defined?(:@@bar) #=> false
Similar to instance_method, searches public method only.
Returns true
if the named private method is defined by mod. If inherit is set, the lookup will also search mod’s ancestors. String
arguments are converted to symbols.
module A def method1() end end class B private def method2() end end class C < B include A def method3() end end A.method_defined? :method1 #=> true C.private_method_defined? "method1" #=> false C.private_method_defined? "method2" #=> true C.private_method_defined? "method2", true #=> true C.private_method_defined? "method2", false #=> false C.method_defined? "method2" #=> false
Makes existing class methods private. Often used to hide the default constructor new
.
String
arguments are converted to symbols.
class SimpleSingleton # Not thread safe private_class_method :new def SimpleSingleton.create(*args, &block) @me = new(*args, &block) if ! @me @me end end
for compatibility