Results for: "Array"

Raised by Encoding and String methods when the source encoding is incompatible with the target encoding.

Generic error class for Fiddle

standard dynamic load exception

The base exception for JSON errors.

This exception is raised if the nesting of parsed data structures is too deep.

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.

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.

Generic error, common for all classes under OpenSSL module

Generic Error for all of OpenSSL::BN (big num)

General error for openssl library configuration files. Including formatting, parsing errors, etc.

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.

HMAC-SHA256 using one-shot interface

key = "key"
data = "message-to-be-authenticated"
mac = OpenSSL::HMAC.hexdigest("SHA256", key, data)
#=> "cddb0db23f469c8bf072b21fd837149bd6ace9ab771cceef14c9e517cc93282e"

HMAC-SHA256 using incremental interface

data1 = File.read("file1")
data2 = File.read("file2")
key = "key"
digest = OpenSSL::Digest.new('SHA256')
hmac = OpenSSL::HMAC.new(key, digest)
hmac << data1
hmac << data2
mac = hmac.digest

YAML event parser class. This class parses a YAML document and calls events on the handler that is passed to the constructor. The events can be used for things such as constructing a YAML AST or deserializing YAML documents. It can even be fed back to Psych::Emitter to emit the same document that was parsed.

See Psych::Handler for documentation on the events that Psych::Parser emits.

Here is an example that prints out ever scalar found in a YAML document:

# Handler for detecting scalar values
class ScalarHandler < Psych::Handler
  def scalar value, anchor, tag, plain, quoted, style
    puts value
  end
end

parser = Psych::Parser.new(ScalarHandler.new)
parser.parse(yaml_document)

Here is an example that feeds the parser back in to Psych::Emitter. The YAML document is read from STDIN and written back out to STDERR:

parser = Psych::Parser.new(Psych::Emitter.new($stderr))
parser.parse($stdin)

Psych uses Psych::Parser in combination with Psych::TreeBuilder to construct an AST of the parsed YAML document.

Scan scalars for built in types

Socket::AncillaryData represents the ancillary data (control information) used by sendmsg and recvmsg system call. It contains socket family, control message (cmsg) level, cmsg type and cmsg data.

The superclass for all exceptions raised by Ruby/zlib.

The following exceptions are defined as subclasses of Zlib::Error. These exceptions are raised when zlib library functions return with an error status.

• Zlib::StreamEnd

• Zlib::NeedDict

• Zlib::DataError

• Zlib::StreamError

• Zlib::MemError

• Zlib::BufError

• Zlib::VersionError

• Zlib::InProgressError

Subclass of Zlib::Error when zlib returns a Z_DATA_ERROR.

Usually if a stream was prematurely freed.

Subclass of Zlib::Error

When zlib returns a Z_STREAM_ERROR, usually if the stream state was inconsistent.

Subclass of Zlib::Error

When zlib returns a Z_MEM_ERROR, usually if there was not enough memory.

Subclass of Zlib::Error when zlib returns a Z_BUF_ERROR.

Usually if no progress is possible.

Subclass of Zlib::Error

When zlib returns a Z_VERSION_ERROR, usually if the zlib library version is incompatible with the version assumed by the caller.