Helper methods for both Gem::Installer
and Gem::Uninstaller
Shows the context around code provided by “falling” indentation
If this is the original code lines:
class OH def hello it "foo" do end end
And this is the line that is captured
it "foo" do
It will yield its surrounding context:
class OH def hello end end
Example:
FallingIndentLines.new( block: block, code_lines: @code_lines ).call do |line| @lines_to_output << line end
Enumerator::Chain
is a subclass of Enumerator
, which represents a chain of enumerables that works as a single enumerator.
This type of objects can be created by Enumerable#chain
and Enumerator#+
.
Fiddle::Pointer
is a class to handle C pointers
This exception is raised if the nesting of parsed data structures is too deep.
This class is used as a return value from ObjectSpace::reachable_objects_from
.
When ObjectSpace::reachable_objects_from
returns an object with references to an internal object, an instance of this class is returned.
You can use the type
method to check the type of the internal object.
OpenSSL::HMAC
allows computing Hash-based Message Authentication Code (HMAC
). It is a type of message authentication code (MAC) involving a hash function in combination with a key. HMAC
can be used to verify the integrity of a message as well as the authenticity.
OpenSSL::HMAC
has a similar interface to OpenSSL::Digest
.
key = "key" data = "message-to-be-authenticated" mac = OpenSSL::HMAC.hexdigest("SHA256", key, data) #=> "cddb0db23f469c8bf072b21fd837149bd6ace9ab771cceef14c9e517cc93282e"
data1 = File.binread("file1") data2 = File.binread("file2") key = "key" hmac = OpenSSL::HMAC.new(key, 'SHA256') hmac << data1 hmac << data2 mac = hmac.digest
This class is the access to openssl’s ENGINE cryptographic module implementation.
See also, www.openssl.org/docs/crypto/engine.html
Document-class: OpenSSL::HMAC
OpenSSL::HMAC
allows computing Hash-based Message Authentication Code (HMAC
). It is a type of message authentication code (MAC) involving a hash function in combination with a key. HMAC
can be used to verify the integrity of a message as well as the authenticity.
OpenSSL::HMAC
has a similar interface to OpenSSL::Digest
.
key = "key" data = "message-to-be-authenticated" mac = OpenSSL::HMAC.hexdigest("SHA256", key, data) #=> "cddb0db23f469c8bf072b21fd837149bd6ace9ab771cceef14c9e517cc93282e"
data1 = File.binread("file1") data2 = File.binread("file2") key = "key" hmac = OpenSSL::HMAC.new(key, 'SHA256') hmac << data1 hmac << data2 mac = hmac.digest
Subclasses ‘BadAlias` for backwards compatibility
Subclass of Zlib::Error
. This error is raised when the zlib stream is currently in progress.
For example:
inflater = Zlib::Inflate.new inflater.inflate(compressed) do inflater.inflate(compressed) # Raises Zlib::InProgressError end
Zlib:Inflate is the class for decompressing compressed data. Unlike Zlib::Deflate
, an instance of this class is not able to duplicate (clone, dup) itself.
exception to wait for reading by EAGAIN. see IO.select
.
exception to wait for writing by EAGAIN. see IO.select
.
exception to wait for reading by EINPROGRESS. see IO.select
.
exception to wait for writing by EINPROGRESS. see IO.select
.
The InstructionSequence
class represents a compiled sequence of instructions for the Virtual Machine used in MRI. Not all implementations of Ruby may implement this class, and for the implementations that implement it, the methods defined and behavior of the methods can change in any version.
With it, you can get a handle to the instructions that make up a method or a proc, compile strings of Ruby code down to VM instructions, and disassemble instruction sequences to strings for easy inspection. It is mostly useful if you want to learn how YARV works, but it also lets you control various settings for the Ruby iseq compiler.
You can find the source for the VM instructions in insns.def
in the Ruby source.
The instruction sequence results will almost certainly change as Ruby changes, so example output in this documentation may be different from what you see.
Of course, this class is MRI specific.
The error thrown when the parser encounters illegal CSV
formatting.
The DidYouMean::Formatter
is the basic, default formatter for the gem. The formatter responds to the message_for
method and it returns a human readable string.
The DidYouMean::Formatter
is the basic, default formatter for the gem. The formatter responds to the message_for
method and it returns a human readable string.