Set local variable named symbol as obj.
def foo a = 1 bind = binding bind.local_variable_set(:a, 2) # set existing local variable `a' bind.local_variable_set(:b, 3) # create new local variable `b' # `b' exists only in binding p bind.local_variable_get(:a) #=> 2 p bind.local_variable_get(:b) #=> 3 p a #=> 2 p b #=> NameError end
This method behaves similarly to the following code:
binding.eval("#{symbol} = #{obj}")
if obj can be dumped in Ruby code.
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Note: this method is obsolete, please use TracePoint instead.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
a filename
a line number
an object id
a binding
the name of a class
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, classname|
printf "%8s %s:%-2d %10s %8s\n", event, file, line, id, classname
}
t = Test.new
t.test
line prog.rb:11 false
c-call prog.rb:11 new Class
c-call prog.rb:11 initialize Object
c-return prog.rb:11 initialize Object
c-return prog.rb:11 new Class
line prog.rb:12 false
call prog.rb:2 test Test
line prog.rb:3 test Test
line prog.rb:4 test Test
return prog.rb:4 test Test
Calls block with two arguments, the item and its index, for each item in enum. Given arguments are passed through to each().
If no block is given, an enumerator is returned instead.
hash = Hash.new %w(cat dog wombat).each_with_index { |item, index| hash[item] = index } hash #=> {"cat"=>0, "dog"=>1, "wombat"=>2}
Starts tracing object allocations from the ObjectSpace extension module.
For example:
require 'objspace' class C include ObjectSpace def foo trace_object_allocations do obj = Object.new p "#{allocation_sourcefile(obj)}:#{allocation_sourceline(obj)}" end end end C.new.foo #=> "objtrace.rb:8"
This example has included the ObjectSpace module to make it easier to read, but you can also use the ::trace_object_allocations notation (recommended).
Note that this feature introduces a huge performance decrease and huge memory consumption.
Return internal class of obj.
obj can be an instance of InternalObjectWrapper.
Note that you should not use this method in your application.
obj can be an instance of InternalObjectWrapper.
Note that you should not use this method in your application.
Specifies a Proc object proc to call after the first prompt has been printed and just before readline starts reading input characters.
See GNU Readline’s rl_pre_input_hook variable.
Raises ArgumentError if proc does not respond to the call method.
Raises NotImplementedError if the using readline library does not support.
Returns a Proc object proc to call after the first prompt has been printed and just before readline starts reading input characters. The default is nil.
Raises NotImplementedError if the using readline library does not support.
This method removes a file system entry path. path shall be a regular file, a directory, or something. If path is a directory, remove it recursively. This method is required to avoid TOCTTOU (time-of-check-to-time-of-use) local security vulnerability of rm_r. rm_r causes security hole when:
* Parent directory is world writable (including /tmp). * Removing directory tree includes world writable directory. * The system has symbolic link.
To avoid this security hole, this method applies special preprocess. If path is a directory, this method chown(2) and chmod(2) all removing directories. This requires the current process is the owner of the removing whole directory tree, or is the super user (root).
WARNING: You must ensure that ALL parent directories cannot be moved by other untrusted users. For example, parent directories should not be owned by untrusted users, and should not be world writable except when the sticky bit set.
WARNING: Only the owner of the removing directory tree, or Unix super user (root) should invoke this method. Otherwise this method does not work.
For details of this security vulnerability, see Perl’s case:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0448 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452
For fileutils.rb, this vulnerability is reported in [ruby-dev:26100].
This method removes a file system entry path. path shall be a regular file, a directory, or something. If path is a directory, remove it recursively. This method is required to avoid TOCTTOU (time-of-check-to-time-of-use) local security vulnerability of rm_r. rm_r causes security hole when:
* Parent directory is world writable (including /tmp). * Removing directory tree includes world writable directory. * The system has symbolic link.
To avoid this security hole, this method applies special preprocess. If path is a directory, this method chown(2) and chmod(2) all removing directories. This requires the current process is the owner of the removing whole directory tree, or is the super user (root).
WARNING: You must ensure that ALL parent directories cannot be moved by other untrusted users. For example, parent directories should not be owned by untrusted users, and should not be world writable except when the sticky bit set.
WARNING: Only the owner of the removing directory tree, or Unix super user (root) should invoke this method. Otherwise this method does not work.
For details of this security vulnerability, see Perl’s case:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0448 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452
For fileutils.rb, this vulnerability is reported in [ruby-dev:26100].
Attempts to enter exclusive section. Returns false if lock fails.
For backward compatibility
See Mutex#try_lock
Quietly ensure the Gem directory dir contains all the proper subdirectories. If we can’t create a directory due to a permission problem, then we will silently continue.
If mode is given, missing directories are created with this mode.
World-writable directories will never be created.
Returns the latest release-version specification for the gem name.
Returns the latest release version of RubyGems.
Returns the version of the latest release-version of gem name
Find all ‘rubygems_plugin’ files in $LOAD_PATH and load them
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.
locking methods.
locking methods.
Hangul Algorithm
Pushes a new {DependencyState}. If the {#specification_provider} says to {SpecificationProvider#allow_missing?} that particular requirement, and there are no possibilities for that requirement, then ‘state` is not pushed, and the node in {#activated} is removed, and we continue resolving the remaining requirements. @param [DependencyState] state @return [void]