Dir.entries( dirname ) â array Class Public methods Returns an array containing all of the filenames in the given directory. Will raise a SystemCallError if the named directory doesn't exist. Dir.entries("testdir") #=> [".", "..", "config.h", "main.rb"]

Dir.delete( string ) â 0 Class Public methods Deletes the named directory. Raises a subclass of SystemCallError if the directory isn't empty.

Dir.chroot( string ) â 0 Class Public methods Changes this process's idea of the file system root. Only a privileged process may make this call. Not available on all platforms. On Unix systems, see chroot(2) for more information.

Dir.chdir( [ string] ) â 0Dir.chdir( [ string] ) {| path | block } â anObject Class Public methods Changes the current working directory of the process to the given string. When called without an argument, changes the directory to the value of the environment variable HOME, or LOGDIR. SystemCallError (probably Errno::ENOENT) if the target directory does not exist. If a block is given, it is passed the name of the new current directory, and the block is executed with that as the c

Dir[ string [, string ...] ] â array Class Public methods Equivalent to calling Dir.glob([string,...],0).

Digest.hexencode(string) â hexencoded_string Class Public methods Generates a hex-encoded version of a given string.

digest_obj.update(string) â digest_objdigest_obj Instance Public methods Updates the digest using a given string and returns self. <<

digest_obj.reset â digest_obj Instance Public methods Resets the digest to the initial state and returns self.

digest_obj.digest_length â Integer Instance Public methods Returns the length of the hash value of the digest in bytes. Digest::SHA256.new.digest_length * 8 # => 256 Digest::SHA384.new.digest_length * 8 # => 384 Digest::SHA512.new.digest_length * 8 # => 512 For example, digests produced by Digest::SHA256 will always be 32 bytes (256 bits) in size.

digest_obj.block_length â Integer Instance Public methods Returns the block length of the digest in bytes. Digest::SHA256.new.block_length * 8 # => 512 Digest::SHA384.new.block_length * 8 # => 1024 Digest::SHA512.new.block_length * 8 # => 1024