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True if the requested gem has already been installed.

Installing a git gem only involves building the extensions and generating the executables.

This is a null install as this specification is already installed. options are ignored.

This is a null install as a locked specification is considered installed. options are ignored.

Installs this specification using the Gem::Installer options. The install method yields a Gem::Installer instance, which indicates the gem will be installed, or nil, which indicates the gem is already installed.

After installation spec is updated to point to the just-installed specification.

This is a null install as this gem was unpacked into a directory. options are ignored.

Enables use of shared session key material in accordance with RFC 5705.

Compile a InstanceVariableReadNode node

Compile a InstanceVariableTargetNode node

Dispatch enter and leave events for InstanceVariableReadNode nodes and continue walking the tree.

Dispatch enter and leave events for InstanceVariableTargetNode nodes and continue walking the tree.

Copy a InstanceVariableReadNode node

Copy a InstanceVariableTargetNode node

If the stream begins with a BOM (byte order marker), consumes the BOM and sets the external encoding accordingly; returns the result encoding if found, or nil otherwise:

File.write('t.tmp', "\u{FEFF}abc")
io = File.open('t.tmp', 'rb')
io.set_encoding_by_bom # => #<Encoding:UTF-8>
io.close

File.write('t.tmp', 'abc')
io = File.open('t.tmp', 'rb')
io.set_encoding_by_bom # => nil
io.close

Raises an exception if the stream is not binmode or its encoding has already been set.

Returns the last win32 socket Error of the current executing Thread or nil if none