File.directory?(file_name) â true or false Instance Public methods Returns true if the named file is a directory, or a symlink that points at a directory, and false otherwise. file_name can be an IO object. File.directory?(".")

indexes(table_name, name = nil) Instance Public methods Returns an array of indexes for the given table.

pre_install(&hook) Class Public methods Adds a pre-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called. If the hook returns false then the install will be aborted.

custom(mime, options = {}) Instance Public methods

uniq_value() Instance Public methods uniq and uniq! are silently deprecated. uniq_value delegates to distinct_value to maintain backwards compatibility. Use distinct_value instead.

sdbm.clear â self Instance Public methods Deletes all data from the database.

float / other â float Instance Public methods Returns a new float which is the result of dividing float by other.

numeric_element(*idxs) Instance Public methods

type() Instance Public methods

now_is_loaded?() Instance Protected methods