Load the given PStore
file. If read_only
is true, the unmarshalled Hash
will be returned. If read_only
is false, a 3-tuple will be returned: the unmarshalled Hash
, a checksum of the data, and the size of the data.
The path to standard location of the user’s data directory.
returns the cmsg data as a string.
p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").data #=> ""
returns the socket option data as a string.
p Socket::Option.new(:INET6, :IPV6, :RECVPKTINFO, [1].pack("i!")).data #=> "\x01\x00\x00\x00"
Guesses the type of the data which have been inputed into the stream. The returned value is either BINARY
, ASCII
, or UNKNOWN
.
Returns an Array
of individual raw profile data Hashes ordered from earliest to latest by :GC_INVOKE_TIME
.
For example:
[ { :GC_TIME=>1.3000000000000858e-05, :GC_INVOKE_TIME=>0.010634999999999999, :HEAP_USE_SIZE=>289640, :HEAP_TOTAL_SIZE=>588960, :HEAP_TOTAL_OBJECTS=>14724, :GC_IS_MARKED=>false }, # ... ]
The keys mean:
:GC_TIME
:GC_INVOKE_TIME
Time
elapsed in seconds from startup to when the GC
was invoked
:HEAP_USE_SIZE
Total bytes of heap used
:HEAP_TOTAL_SIZE
Total size of heap in bytes
:HEAP_TOTAL_OBJECTS
Total number of objects
:GC_IS_MARKED
Returns true
if the GC
is in mark phase
If ruby was built with GC_PROFILE_MORE_DETAIL
, you will also have access to the following hash keys:
:GC_MARK_TIME
:GC_SWEEP_TIME
:ALLOCATE_INCREASE
:ALLOCATE_LIMIT
:HEAP_USE_PAGES
:HEAP_LIVE_OBJECTS
:HEAP_FREE_OBJECTS
:HAVE_FINALIZE
Sets the length of the plaintext / ciphertext message that will be processed in CCM mode. Make sure to call this method after key=
and iv=
have been set, and before auth_data=
.
Only call this method after calling Cipher#encrypt
or Cipher#decrypt
.
Set
header fields and a body from HTML form data. params
should be an Array
of Arrays or a Hash
containing HTML form data. Optional argument sep
means data record separator.
Values are URL encoded as necessary and the content-type is set to application/x-www-form-urlencoded
Example:
http.form_data = {"q" => "ruby", "lang" => "en"} http.form_data = {"q" => ["ruby", "perl"], "lang" => "en"} http.set_form_data({"q" => "ruby", "lang" => "en"}, ';')
Verifies that data
matches the signature
created by public_key
and the digest
algorithm.
Returns the concatenated string from strings
.
Load extra data embed into binary format String
object.
Subclass of Zlib::Error
when zlib returns a Z_DATA_ERROR.
Usually if a stream was prematurely freed.
MatchData
encapsulates the result of matching a Regexp
against string. It is returned by Regexp#match
and String#match
, and also stored in a global variable returned by Regexp.last_match
.
Usage:
url = 'https://docs.ruby-lang.org/en/2.5.0/MatchData.html' m = url.match(/(\d\.?)+/) # => #<MatchData "2.5.0" 1:"0"> m.string # => "https://docs.ruby-lang.org/en/2.5.0/MatchData.html" m.regexp # => /(\d\.?)+/ # entire matched substring: m[0] # => "2.5.0" # Working with unnamed captures m = url.match(%r{([^/]+)/([^/]+)\.html$}) m.captures # => ["2.5.0", "MatchData"] m[1] # => "2.5.0" m.values_at(1, 2) # => ["2.5.0", "MatchData"] # Working with named captures m = url.match(%r{(?<version>[^/]+)/(?<module>[^/]+)\.html$}) m.captures # => ["2.5.0", "MatchData"] m.named_captures # => {"version"=>"2.5.0", "module"=>"MatchData"} m[:version] # => "2.5.0" m.values_at(:version, :module) # => ["2.5.0", "MatchData"] # Numerical indexes are working, too m[1] # => "2.5.0" m.values_at(1, 2) # => ["2.5.0", "MatchData"]
Parts of last MatchData
(returned by Regexp.last_match
) are also aliased as global variables:
$~
is Regexp.last_match
;
$&
is Regexp.last_match
[ 0 ]
;
$1
, $2
, and so on are Regexp.last_match
[ i ]
(captures by number);
$`
is Regexp.last_match
.pre_match
;
$'
is Regexp.last_match
.post_match
;
$+
is Regexp.last_match
[ -1 ]
(the last capture).
See also “Special global variables” section in Regexp
documentation.
The most standard error types are subclasses of StandardError
. A rescue clause without an explicit Exception
class will rescue all StandardErrors (and only those).
def foo raise "Oups" end foo rescue "Hello" #=> "Hello"
On the other hand:
require 'does/not/exist' rescue "Hi"
raises the exception:
LoadError: no such file to load -- does/not/exist