Converting an integer to a hexadecimal string in Ruby
You can give to_s a base other than 10:
10.to_s(16) #=> "a"Note that in ruby 2.4 FixNum and BigNum were unified in the Integer class. If you are using an older ruby check the documentation of FixNum#to_s and BigNum#to_s
To summarize:
p 10.to_s(16) #=> "a"p "%x" % 10 #=> "a"p "%02X" % 10 #=> "0A"p sprintf("%02X", 10) #=> "0A"p "#%02X%02X%02X" % [255, 0, 10] #=> "#FF000A"