Invoked as a callback whenever a singleton method is removed from the receiver.
module Chatty def Chatty.singleton_method_removed(id) puts "Removing #{id.id2name}" end def self.one() end def two() end def Chatty.three() end class << self remove_method :three remove_method :one end end
produces:
Removing three Removing one
Invoked as a callback whenever a singleton method is undefined in the receiver.
module Chatty def Chatty.singleton_method_undefined(id) puts "Undefining #{id.id2name}" end def Chatty.one() end class << self undef_method(:one) end end
produces:
Undefining one
Returns IO instance tied to ARGF for writing if inplace mode is enabled.
Checks for a method provided by this the delegate object by forwarding the call through _getobj_.
Returns the value of the local variable symbol.
def foo a = 1 binding.local_variable_get(:a) #=> 1 binding.local_variable_get(:b) #=> NameError end
This method is the short version of the following code:
binding.eval("#{symbol}")
Returns true if a local variable symbol exists.
def foo a = 1 binding.local_variable_defined?(:a) #=> true binding.local_variable_defined?(:b) #=> false end
This method is the short version of the following code:
binding.eval("defined?(#{symbol}) == 'local-variable'")
If the correponding value is not set, yield a value with init_block and store the value in thread-safe manner. This method returns corresponding stored value.
(1..10).map{ Thread.new(it){|i| Ractor.store_if_absent(:s){ f(); i } #=> return stored value of key :s } }.map(&:value).uniq.size #=> 1 and f() is called only once
Returns the value of a thread local variable that has been set. Note that these are different than fiber local values. For fiber local values, please see Thread#[] and Thread#[]=.
Thread local values are carried along with threads, and do not respect fibers. For example:
Thread.new { Thread.current.thread_variable_set("foo", "bar") # set a thread local Thread.current["foo"] = "bar" # set a fiber local Fiber.new { Fiber.yield [ Thread.current.thread_variable_get("foo"), # get the thread local Thread.current["foo"], # get the fiber local ] }.resume }.join.value # => ['bar', nil]
The value “bar” is returned for the thread local, where nil is returned for the fiber local. The fiber is executed in the same thread, so the thread local values are available.
Return the native thread ID which is used by the Ruby thread.
The ID depends on the OS. (not POSIX thread ID returned by pthread_self(3))
On Linux it is TID returned by gettid(2).
On macOS it is the system-wide unique integral ID of thread returned by pthread_threadid_np(3).
On FreeBSD it is the unique integral ID of the thread returned by pthread_getthreadid_np(3).
On Windows it is the thread identifier returned by GetThreadId().
On other platforms, it raises NotImplementedError.
NOTE: If the thread is not associated yet or already deassociated with a native thread, it returns nil. If the Ruby implementation uses M:N thread model, the ID may change depending on the timing.
Establishes proc on thr as the handler for tracing, or disables tracing if the parameter is nil.
Establishes proc as the handler for tracing, or disables tracing if the parameter is nil.
Note: this method is obsolete, please use TracePoint instead.
proc takes up to six parameters:
an event name string
a filename string
a line number
a method name symbol, or nil
a binding, or nil
the class, module, or nil
proc is invoked whenever an event occurs.
Events are:
"c-call"call a C-language routine
"c-return"return from a C-language routine
"call"call a Ruby method
"class"start a class or module definition
"end"finish a class or module definition
"line"execute code on a new line
"raise"raise an exception
"return"return from a Ruby method
Tracing is disabled within the context of proc.
class Test def test a = 1 b = 2 end end set_trace_func proc { |event, file, line, id, binding, class_or_module| printf "%8s %s:%-2d %16p %14p\n", event, file, line, id, class_or_module } t = Test.new t.test
Produces:
c-return prog.rb:8 :set_trace_func Kernel
line prog.rb:11 nil nil
c-call prog.rb:11 :new Class
c-call prog.rb:11 :initialize BasicObject
c-return prog.rb:11 :initialize BasicObject
c-return prog.rb:11 :new Class
line prog.rb:12 nil nil
call prog.rb:2 :test Test
line prog.rb:3 :test Test
line prog.rb:4 :test Test
return prog.rb:5 :test Test
Return internal class of obj.
obj can be an instance of InternalObjectWrapper.
Note that you should not use this method in your application.
Enables measuring GC time. You can get the result with GC.stat(:time). Note that GC time measurement can cause some performance overhead.
Returns the measure_total_time flag (default: true). Note that measurement can affect the application’s performance.
Suffixes for dynamic library require-able paths.
Register a Gem::Specification for default gem.
Two formats for the specification are supported:
MRI 2.0 style, where spec.files contains unprefixed require names. The spec’s filenames will be registered as-is.
New style, where spec.files contains files prefixed with paths from spec.require_paths. The prefixes are stripped before registering the spec’s filenames. Unprefixed files are omitted.
Clear default gem related variables. It is for test
Paths where RubyGems’ .rb files and bin files are installed
Finds the user’s config file
The default signing key path
Securely removes the entry given by path, which should be the entry for a regular file, a symbolic link, or a directory.
Argument path should be interpretable as a path.
Avoids a local vulnerability that can exist in certain circumstances; see Avoiding the TOCTTOU Vulnerability.
Optional argument force specifies whether to ignore raised exceptions of StandardError and its descendants.
Related: methods for deleting.
Securely removes the entry given by path, which should be the entry for a regular file, a symbolic link, or a directory.
Argument path should be interpretable as a path.
Avoids a local vulnerability that can exist in certain circumstances; see Avoiding the TOCTTOU Vulnerability.
Optional argument force specifies whether to ignore raised exceptions of StandardError and its descendants.
Related: methods for deleting.
Shortcut for defining multiple delegator methods, but with no provision for using a different name. The following two code samples have the same effect:
def_delegators :@records, :size, :<<, :map def_delegator :@records, :size def_delegator :@records, :<< def_delegator :@records, :map