Removes duplicate elements from self, the first occurrence always being retained; returns self if any elements removed, nil otherwise.
With no block given, identifies and removes elements using method eql? to compare.
Returns self if any elements removed:
a = [0, 0, 1, 1, 2, 2] a.uniq! # => [0, 1, 2]
Returns nil if no elements removed.
With a block given, calls the block for each element; identifies (using method eql?) and removes elements for which the block returns duplicate values.
Returns self if any elements removed:
a = ['a', 'aa', 'aaa', 'b', 'bb', 'bbb'] a.uniq! {|element| element.size } # => ['a', 'aa', 'aaa']
Returns nil if no elements removed.
Returns true for IPv6 unique local address (fc00::/7, RFC4193). It returns false otherwise.
Returns a new Array that is the union of self and all given Arrays other_arrays; duplicates are removed; order is preserved; items are compared using eql?:
[0, 1, 2, 3].union([4, 5], [6, 7]) # => [0, 1, 2, 3, 4, 5, 6, 7] [0, 1, 1].union([2, 1], [3, 1]) # => [0, 1, 2, 3] [0, 1, 2, 3].union([3, 2], [1, 0]) # => [0, 1, 2, 3]
Returns a copy of self if no arguments given.
Related: Array#|.
Returns a new regexp that is the union of the given patterns:
r = Regexp.union(%w[cat dog]) # => /cat|dog/ r.match('cat') # => #<MatchData "cat"> r.match('dog') # => #<MatchData "dog"> r.match('cog') # => nil
For each pattern that is a string, Regexp.new(pattern) is used:
Regexp.union('penzance') # => /penzance/ Regexp.union('a+b*c') # => /a\+b\*c/ Regexp.union('skiing', 'sledding') # => /skiing|sledding/ Regexp.union(['skiing', 'sledding']) # => /skiing|sledding/
For each pattern that is a regexp, it is used as is, including its flags:
Regexp.union(/foo/i, /bar/m, /baz/x) # => /(?i-mx:foo)|(?m-ix:bar)|(?x-mi:baz)/ Regexp.union([/foo/i, /bar/m, /baz/x]) # => /(?i-mx:foo)|(?m-ix:bar)|(?x-mi:baz)/
With no arguments, returns /(?!)/:
Regexp.union # => /(?!)/
If any regexp pattern contains captures, the behavior is unspecified.
creates a new socket connected to path using UNIX socket socket.
If a block is given, the block is called with the socket. The value of the block is returned. The socket is closed when this method returns.
If no block is given, the socket is returned.
# talk to /tmp/sock socket. Socket.unix("/tmp/sock") {|sock| t = Thread.new { IO.copy_stream(sock, STDOUT) } IO.copy_stream(STDIN, sock) t.join }
returns an addrinfo object for UNIX socket address.
socktype specifies the socket type. If it is omitted, :STREAM is used.
Addrinfo.unix("/tmp/sock") #=> #<Addrinfo: /tmp/sock SOCK_STREAM> Addrinfo.unix("/tmp/sock", :DGRAM) #=> #<Addrinfo: /tmp/sock SOCK_DGRAM>
returns true if addrinfo is UNIX address. returns false otherwise.
Addrinfo.tcp("127.0.0.1", 80).unix? #=> false Addrinfo.tcp("::1", 80).unix? #=> false Addrinfo.unix("/tmp/sock").unix? #=> true
Returns true if coverage stats are currently being collected (after Coverage.start call, but before Coverage.result call)
Returns a copy of self with Unicode normalization applied.
Argument form must be one of the following symbols (see Unicode normalization forms):
:nfc: Canonical decomposition, followed by canonical composition.
:nfd: Canonical decomposition.
:nfkc: Compatibility decomposition, followed by canonical composition.
:nfkd: Compatibility decomposition.
The encoding of self must be one of:
Encoding::UTF_8
Encoding::UTF_16BE
Encoding::UTF_16LE
Encoding::UTF_32BE
Encoding::UTF_32LE
Encoding::GB18030
Encoding::UCS_2BE
Encoding::UCS_4BE
Examples:
"a\u0300".unicode_normalize # => "a" "\u00E0".unicode_normalize(:nfd) # => "a "
Related: String#unicode_normalize!, String#unicode_normalized?.
Like String#unicode_normalize, except that the normalization is performed on self.
Related String#unicode_normalized?.
Returns true if self is in the given form of Unicode normalization, false otherwise. The form must be one of :nfc, :nfd, :nfkc, or :nfkd.
Examples:
"a\u0300".unicode_normalized? # => false "a\u0300".unicode_normalized?(:nfd) # => true "\u00E0".unicode_normalized? # => true "\u00E0".unicode_normalized?(:nfd) # => false
Raises an exception if self is not in a Unicode encoding:
s = "\xE0".force_encoding('ISO-8859-1') s.unicode_normalized? # Raises Encoding::CompatibilityError.
Related: String#unicode_normalize, String#unicode_normalize!.
Returns the socket path as a string.
Addrinfo.unix("/tmp/sock").unix_path #=> "/tmp/sock"
Adds a post-uninstall hook that will be passed a Gem::Uninstaller instance and the spec that was uninstalled when Gem::Uninstaller#uninstall is called
Adds a pre-uninstall hook that will be passed an Gem::Uninstaller instance and the spec that will be uninstalled when Gem::Uninstaller#uninstall is called
Performs the uninstall of the gem. This removes the spec, the Gem directory, and the cached .gem file.
Creates a class to wrap the C union described by signature.
MyUnion = union ['int i', 'char c']
creates a UNIX server socket on path
If no block given, it returns a listening socket.
If a block is given, it is called with the socket and the block value is returned. When the block exits, the socket is closed and the socket file is removed.
socket = Socket.unix_server_socket("/tmp/s") p socket #=> #<Socket:fd 3> p socket.local_address #=> #<Addrinfo: /tmp/s SOCK_STREAM> Socket.unix_server_socket("/tmp/sock") {|s| p s #=> #<Socket:fd 3> p s.local_address #=> # #<Addrinfo: /tmp/sock SOCK_STREAM> }
creates a UNIX socket server on path. It calls the block for each socket accepted.
If host is specified, it is used with port to determine the server ports.
The socket is not closed when the block returns. So application should close it.
This method deletes the socket file pointed by path at first if the file is a socket file and it is owned by the user of the application. This is safe only if the directory of path is not changed by a malicious user. So don’t use /tmp/malicious-users-directory/socket. Note that /tmp/socket and /tmp/your-private-directory/socket is safe assuming that /tmp has sticky bit.
# Sequential echo server. # It services only one client at a time. Socket.unix_server_loop("/tmp/sock") {|sock, client_addrinfo| begin IO.copy_stream(sock, sock) ensure sock.close end }
Unpacks sockaddr into path.
sockaddr should be a string or an addrinfo for AF_UNIX.
sockaddr = Socket.sockaddr_un("/tmp/sock") p Socket.unpack_sockaddr_un(sockaddr) #=> "/tmp/sock"