Disallows further read using shutdown system call.
s1, s2 = UNIXSocket.pair s1.close_read s2.puts #=> Broken pipe (Errno::EPIPE)
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> }
Returns the IP address as a string.
Addrinfo.tcp("127.0.0.1", 80).ip_address #=> "127.0.0.1" Addrinfo.tcp("::1", 80).ip_address #=> "::1"
Example
UNIXServer.open("/tmp/sock") {|serv| UNIXSocket.open("/tmp/sock") {|c| s = serv.accept c.send_io STDOUT stdout = s.recv_io p STDOUT.fileno #=> 1 p stdout.fileno #=> 7 stdout.puts "hello" # outputs "hello\n" to standard output. } }
klass will determine the class of io returned (using the IO.for_fd singleton method or similar). If klass is nil, an integer file descriptor is returned.
mode is the same as the argument passed to IO.for_fd
Closes self for reading; closed-write setting remains unchanged.
Raises IOError if reading is attempted.
Related: StringIO#close, StringIO#close_write.
Returns true if self is closed for reading, false otherwise.
Returns the substring that precedes the matched substring from the most recent match attempt if it was successful, or nil otherwise; see [Basic Match Values]:
scanner = StringScanner.new('foobarbaz') scanner.pre_match # => nil scanner.pos = 3 scanner.exist?(/baz/) # => 6 scanner.pre_match # => "foobar" # Substring of entire string, not just target string. scanner.exist?(/nope/) # => nil scanner.pre_match # => nil
Returns the array of captured match values at indexes (1..) if the most recent match attempt succeeded, or nil otherwise; see [Captured Match Values]:
scanner = StringScanner.new('Fri Dec 12 1975 14:39') scanner.named_captures # => {} pattern = /(?<wday>\w+) (?<month>\w+) (?<day>\d+) / scanner.match?(pattern) scanner.named_captures # => {"wday"=>"Fri", "month"=>"Dec", "day"=>"12"} scanner.string = 'nope' scanner.match?(pattern) scanner.named_captures # => {"wday"=>nil, "month"=>nil, "day"=>nil} scanner.match?(/nosuch/) scanner.named_captures # => {}
Returns the file extension appended to the names of backup copies of modified files under in-place edit mode. This value can be set using ARGF.inplace_mode= or passing the -i switch to the Ruby binary.
Sets the filename extension for in-place editing mode to the given String. The backup copy of each file being edited has this value appended to its filename.
For example:
$ ruby argf.rb file.txt
ARGF.inplace_mode = '.bak'
ARGF.each_line do |line|
print line.sub("foo","bar")
end
First, file.txt.bak is created as a backup copy of file.txt. Then, each line of file.txt has the first occurrence of “foo” replaced with “bar”.
Returns a new binding each time near TOPLEVEL_BINDING for runs that do not specify a binding.
Create unnamed module, define methodname as instance method of it, and return it.
example:
filename = 'example.rhtml' # 'arg1' and 'arg2' are used in example.rhtml erb = ERB.new(File.read(filename)) erb.filename = filename MyModule = erb.def_module('render(arg1, arg2)') class MyClass include MyModule end
Returns a hash of the named captures; each key is a capture name; each value is its captured string or nil:
m = /(?<foo>.)(.)(?<bar>.+)/.match("hoge") # => #<MatchData "hoge" foo:"h" bar:"ge"> m.named_captures # => {"foo"=>"h", "bar"=>"ge"} m = /(?<a>.)(?<b>.)/.match("01") # => #<MatchData "01" a:"0" b:"1"> m.named_captures #=> {"a" => "0", "b" => "1"} m = /(?<a>.)(?<b>.)?/.match("0") # => #<MatchData "0" a:"0" b:nil> m.named_captures #=> {"a" => "0", "b" => nil} m = /(?<a>.)(?<a>.)/.match("01") # => #<MatchData "01" a:"0" a:"1"> m.named_captures #=> {"a" => "1"}
If keyword argument symbolize_names is given a true value, the keys in the resulting hash are Symbols:
m = /(?<a>.)(?<a>.)/.match("01") # => #<MatchData "01" a:"0" a:"1"> m.named_captures(symbolize_names: true) #=> {:a => "1"}
Returns the substring of the target string from its beginning up to the first match in self (that is, self[0]); equivalent to regexp global variable $`:
m = /(.)(.)(\d+)(\d)/.match("THX1138.") # => #<MatchData "HX1138" 1:"H" 2:"X" 3:"113" 4:"8"> m[0] # => "HX1138" m.pre_match # => "T"
Related: MatchData#post_match.
Returns the group most recently added to the stack.
Contrived example:
out = ""
=> ""
q = PrettyPrint.new(out)
=> #<PrettyPrint:0x82f85c0 @output="", @maxwidth=79, @newline="\n", @genspace=#<Proc:0x82f8368@/home/vbatts/.rvm/rubies/ruby-head/lib/ruby/2.0.0/prettyprint.rb:82 (lambda)>, @output_width=0, @buffer_width=0, @buffer=[], @group_stack=[#<PrettyPrint::Group:0x82f8138 @depth=0, @breakables=[], @break=false>], @group_queue=#<PrettyPrint::GroupQueue:0x82fb7c0 @queue=[[#<PrettyPrint::Group:0x82f8138 @depth=0, @breakables=[], @break=false>]]>, @indent=0>
q.group {
q.text q.current_group.inspect
q.text q.newline
q.group(q.current_group.depth + 1) {
q.text q.current_group.inspect
q.text q.newline
q.group(q.current_group.depth + 1) {
q.text q.current_group.inspect
q.text q.newline
q.group(q.current_group.depth + 1) {
q.text q.current_group.inspect
q.text q.newline
}
}
}
}
=> 284
puts out
#<PrettyPrint::Group:0x8354758 @depth=1, @breakables=[], @break=false>
#<PrettyPrint::Group:0x8354550 @depth=2, @breakables=[], @break=false>
#<PrettyPrint::Group:0x83541cc @depth=3, @breakables=[], @break=false>
#<PrettyPrint::Group:0x8347e54 @depth=4, @breakables=[], @break=false>
This is similar to breakable except the decision to break or not is determined individually.
Two fill_breakable under a group may cause 4 results: (break,break), (break,non-break), (non-break,break), (non-break,non-break). This is different to breakable because two breakable under a group may cause 2 results: (break,break), (non-break,non-break).
The text sep is inserted if a line is not broken at this point.
If sep is not specified, “ ” is used.
If width is not specified, sep.length is used. You will have to specify this when sep is a multibyte character, for example.
Iterates over all IP addresses for name.
Iterates over all IP addresses for name.
Make obj shareable between ractors.
obj and all the objects it refers to will be frozen, unless they are already shareable.
If copy keyword is true, it will copy objects before freezing them, and will not modify obj or its internal objects.
Note that the specification and implementation of this method are not mature and may be changed in the future.
obj = ['test'] Ractor.shareable?(obj) #=> false Ractor.make_shareable(obj) #=> ["test"] Ractor.shareable?(obj) #=> true obj.frozen? #=> true obj[0].frozen? #=> true # Copy vs non-copy versions: obj1 = ['test'] obj1s = Ractor.make_shareable(obj1) obj1.frozen? #=> true obj1s.object_id == obj1.object_id #=> true obj2 = ['test'] obj2s = Ractor.make_shareable(obj2, copy: true) obj2.frozen? #=> false obj2s.frozen? #=> true obj2s.object_id == obj2.object_id #=> false obj2s[0].object_id == obj2[0].object_id #=> false
See also the “Shareable and unshareable objects” section in the Ractor class docs.
Returns the status of the global “ignore deadlock” condition. The default is false, so that deadlock conditions are not ignored.
See also ::ignore_deadlock=.
Returns the new state. When set to true, the VM will not check for deadlock conditions. It is only useful to set this if your application can break a deadlock condition via some other means, such as a signal.
Thread.ignore_deadlock = true queue = Thread::Queue.new trap(:SIGUSR1){queue.push "Received signal"} # raises fatal error unless ignoring deadlock puts queue.pop
See also ::ignore_deadlock.