ruby 랜덤 .. securerandom

securerandom

# https://ruby-doc.org/stdlib-2.4.0/libdoc/securerandom/rdoc/SecureRandom.html # https://ruby-doc.org/stdlib-2.1.2/libdoc/securerandom/rdoc/SecureRandom.html#method-c-random_number require 'securerandom' p 'Generate random hexadecimal strings:' p SecureRandom.hex(8) p SecureRandom.hex(10) p SecureRandom.hex(16) p '-----------------------------------------' p 'Generate random base64 strings:' p SecureRandom.base64(10) p SecureRandom.base64(12) p SecureRandom.base64(16) p '-----------------------------------------' p 'Generate random base58 strings:' p SecureRandom.base64(16) p SecureRandom.base64(16) p '-----------------------------------------' p 'Generate random binary strings:' p SecureRandom.random_bytes(10) p SecureRandom.random_bytes(10) p '-----------------------------------------' p 'Generate UUIDs' p SecureRandom.uuid p SecureRandom.uuid p '-----------------------------------------' p '::random_number generates a random number.' p SecureRandom.random_number(100) p SecureRandom.random_number(100) p '-----------------------------------------' p SecureRandom.urlsafe_base64 #=> "b4GOKm4pOYU_-BOXcrUGDg" p SecureRandom.urlsafe_base64 #=> "UZLdOkzop70Ddx-IJR0ABg" p SecureRandom.urlsafe_base64(nil, true) #=> "i0XQ-7gglIsHGV2_BNPrdQ==" p SecureRandom.urlsafe_base64(nil, true) #=> "-M8rLhr7JEpJlqFGUMmOxg=="