The Addrinfo
class maps struct addrinfo
to ruby. This structure identifies an Internet host and a service.
IO streams for strings, with access similar to IO
; see IO
.
Examples on this page assume that StringIO has been required:
require 'stringio'
This class implements a pretty printing algorithm. It finds line breaks and nice indentations for grouped structure.
By default, the class assumes that primitive elements are strings and each byte in the strings have single column in width. But it can be used for other situations by giving suitable arguments for some methods:
newline object and space generation block for PrettyPrint.new
optional width argument for PrettyPrint#text
There are several candidate uses:
text formatting using proportional fonts
multibyte characters which has columns different to number of bytes
non-string formatting
Box based formatting?
Other (better) model/algorithm?
Report any bugs at bugs.ruby-lang.org
Christian Lindig, Strictly Pretty, March 2000, lindig.github.io/papers/strictly-pretty-2000.pdf
Philip Wadler, A prettier printer, March 1998, homepages.inf.ed.ac.uk/wadler/topics/language-design.html#prettier
Tanaka Akira <akr@fsij.org>
The Prism
Ruby parser.
“Parsing Ruby is suddenly manageable!”
- You, hopefully
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/compiler.rb.erb if you are looking to modify the template
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/dispatcher.rb.erb if you are looking to modify the template
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/dsl.rb.erb if you are looking to modify the template
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/inspect_visitor.rb.erb if you are looking to modify the template
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/mutation_compiler.rb.erb if you are looking to modify the template
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/node.rb.erb if you are looking to modify the template
Here we are reopening the prism module to provide methods on nodes that aren’t templated and are meant as convenience methods.
typed: ignore
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/reflection.rb.erb if you are looking to modify the template
This file is generated by the templates/template.rb script and should not be modified manually. See templates/lib/prism/visitor.rb.erb if you are looking to modify the template
This library is an interface to secure random number generators which are suitable for generating session keys in HTTP cookies, etc.
You can use this library in your application by requiring it:
require 'securerandom'
It supports the following secure random number generators:
openssl
/dev/urandom
SecureRandom
is extended by the Random::Formatter
module which defines the following methods:
alphanumeric
base64
choose
gen_random
hex
rand
random_bytes
random_number
urlsafe_base64
uuid
These methods are usable as class methods of SecureRandom
such as SecureRandom.hex
.
If a secure random number generator is not available, NotImplementedError
is raised.
Private method to assemble query
from attributes
, scope
, filter
, and extensions
.
Returns Regexp
that is default self.regexp[:ABS_URI_REF]
, unless schemes
is provided. Then it is a Regexp.union
with self.pattern[:X_ABS_URI]
.
Constructs the default Hash
of patterns.
Constructs the default Hash
of Regexp’s.
Enumerator::ArithmeticSequence
is a subclass of Enumerator
, that is a representation of sequences of numbers with common difference. Instances of this class can be generated by the Range#step
and Numeric#step
methods.
The class can be used for slicing Array
(see Array#slice
) or custom collections.
An FFI closure wrapper, for handling callbacks.
closure = Class.new(Fiddle::Closure) { def call 10 end }.new(Fiddle::TYPE_INT, []) #=> #<#<Class:0x0000000150d308>:0x0000000150d240> func = Fiddle::Function.new(closure, [], Fiddle::TYPE_INT) #=> #<Fiddle::Function:0x00000001516e58> func.call #=> 10
FIXME: This isn’t documented in Nutshell.
Since MonitorMixin.new_cond
returns a ConditionVariable
, and the example above calls while_wait and signal, this class should be documented.
UDP/IP address information used by Socket.udp_server_loop
.
WIN32OLE::Variable
objects represent OLE variable information.
WIN32OLE::Variant
objects represents OLE variant.
Win32OLE converts Ruby object into OLE variant automatically when invoking OLE methods. If OLE method requires the argument which is different from the variant by automatic conversion of Win32OLE, you can convert the specified variant type by using WIN32OLE::Variant
class.
param = WIN32OLE::Variant.new(10, WIN32OLE::VARIANT::VT_R4) oleobj.method(param)
WIN32OLE::Variant
does not support VT_RECORD variant. Use WIN32OLE::Record
class instead of WIN32OLE::Variant
if the VT_RECORD variant is needed.
Zlib::GzipWriter
is a class for writing gzipped files. GzipWriter
should be used with an instance of IO
, or IO-like, object.
Following two example generate the same result.
Zlib::GzipWriter.open('hoge.gz') do |gz| gz.write 'jugemu jugemu gokou no surikire...' end File.open('hoge.gz', 'w') do |f| gz = Zlib::GzipWriter.new(f) gz.write 'jugemu jugemu gokou no surikire...' gz.close end
To make like gzip(1) does, run following:
orig = 'hoge.txt' Zlib::GzipWriter.open('hoge.gz') do |gz| gz.mtime = File.mtime(orig) gz.orig_name = orig gz.write IO.binread(orig) end
NOTE: Due to the limitation of Ruby’s finalizer, you must explicitly close GzipWriter
objects by Zlib::GzipWriter#close
etc. Otherwise, GzipWriter
will be not able to write the gzip footer and will generate a broken gzip file.
exception to wait for writing by EAGAIN. see IO.select
.