convert a number from base 2 to base 16 in ruby

To convert a number from base 2 to base 16 in Ruby, you can use the to_i method, which can convert strings representing numbers in different bases into integers, and then use the to_s method with a base of 16 to convert back to a hexadecimal string.

Here's an example code snippet:

main.rb
binary_number = "11011011"
hex_number = binary_number.to_i(2).to_s(16)
puts hex_number # "db"
94 chars
4 lines

In this example, binary_number is a string representing a binary number. We call the to_i method on this string with an argument of 2, which tells it to interpret the string as a binary number.

This returns an integer value of 219 (which is the decimal equivalent of the binary number). We then call to_s on this integer, passing in a base of 16 to convert it to a hexadecimal string.

The resulting string is "db", which represents the same value as the binary number "11011011".