Executes block for each key in the database, passing the key and the corresponding value as a parameter.
Yields all attributes (as symbols) along with the corresponding values or returns an enumerator if no block is given.
require "ostruct" data = OpenStruct.new("country" => "Australia", :capital => "Canberra") data.each_pair.to_a # => [[:country, "Australia"], [:capital, "Canberra"]]
Deserializes JSON
string by constructing new Regexp
object with source s
(Regexp
or String) and options o
serialized by to_json
The first form returns the MatchData
object generated by the last successful pattern match. Equivalent to reading the special global variable $~
(see Special global variables in Regexp
for details).
The second form returns the nth field in this MatchData
object. n can be a string or symbol to reference a named capture.
Note that the last_match
is local to the thread and method scope of the method that did the pattern match.
/c(.)t/ =~ 'cat' #=> 0 Regexp.last_match #=> #<MatchData "cat" 1:"a"> Regexp.last_match(0) #=> "cat" Regexp.last_match(1) #=> "a" Regexp.last_match(2) #=> nil /(?<lhs>\w+)\s*=\s*(?<rhs>\w+)/ =~ "var = val" Regexp.last_match #=> #<MatchData "var = val" lhs:"var" rhs:"val"> Regexp.last_match(:lhs) #=> "var" Regexp.last_match(:rhs) #=> "val"
Returns true if this class can be used to create an instance from a serialised JSON
string. The class has to implement a class method json_create that expects a hash as first parameter. The hash should include the required data.
Returns an Array of values corresponding to the given keys.
Iterates over each key-value pair in the database.
If no block is given, returns an Enumerator
.
creates an Addrinfo
object from the arguments.
The arguments are interpreted as similar to self.
Addrinfo.tcp("0.0.0.0", 4649).family_addrinfo("www.ruby-lang.org", 80) #=> #<Addrinfo: 221.186.184.68:80 TCP (www.ruby-lang.org:80)> Addrinfo.unix("/tmp/sock").family_addrinfo("/tmp/sock2") #=> #<Addrinfo: /tmp/sock2 SOCK_STREAM>
creates a new Socket
connected to the address of local_addrinfo
.
If local_addrinfo is nil, the address of the socket is not bound.
The timeout specify the seconds for timeout. Errno::ETIMEDOUT is raised when timeout occur.
If a block is given the created socket is yielded for each address.
Returns the IP address and port number as 2-element array.
Addrinfo.tcp("127.0.0.1", 80).ip_unpack #=> ["127.0.0.1", 80] Addrinfo.tcp("::1", 80).ip_unpack #=> ["::1", 80]
Returns true for IPv4 private address (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). It returns false otherwise.
Returns the Encoding
object that represents the encoding of the file. If strio is write mode and no encoding is specified, returns nil
.
Returns the Encoding
of the internal string if conversion is specified. Otherwise returns nil.
Returns the size of the most recent match (see matched
), or nil
if there was no recent match.
s = StringScanner.new('test string') s.check /\w+/ # -> "test" s.matched_size # -> 4 s.check /\d+/ # -> nil s.matched_size # -> nil
Returns the pre-match
(in the regular expression sense) of the last scan.s = StringScanner.new('test string') s.scan(/\w+/) # -> "test" s.scan(/\s+/) # -> " " s.pre_match # -> "test" s.post_match # -> "string"
Returns the post-match
(in the regular expression sense) of the last scan.s = StringScanner.new('test string') s.scan(/\w+/) # -> "test" s.scan(/\s+/) # -> " " s.pre_match # -> "test" s.post_match # -> "string"
Returns the subgroups in the most recent match at the given indices. If nothing was priorly matched, it returns nil.
s = StringScanner.new("Fri Dec 12 1975 14:39") s.scan(/(\w+) (\w+) (\d+) /) # -> "Fri Dec 12 " s.values_at 0, -1, 5, 2 # -> ["Fri Dec 12 ", "12", nil, "Dec"] s.scan(/(\w+) (\w+) (\d+) /) # -> nil s.values_at 0, -1, 5, 2 # -> nil
Creates GUID.
WIN32OLE.create_guid # => {1CB530F1-F6B1-404D-BCE6-1959BF91F4A8}
Translates and dispatches Windows message.
Calls block once for each key in hsh, passing the key-value pair as parameters.
If no block is given, an enumerator is returned instead.
h = { "a" => 100, "b" => 200 } h.each {|key, value| puts "#{key} is #{value}" }
produces:
a is 100 b is 200
Return an array containing the values associated with the given keys. Also see Hash.select
.
h = { "cat" => "feline", "dog" => "canine", "cow" => "bovine" } h.values_at("cow", "cat") #=> ["bovine", "feline"]
Yields each environment variable name
and value
.
If no block is given an Enumerator
is returned.