Converting an integer to a hexadecimal string in Ruby
Is there a built in way to convert an integer in Ruby into its hexadecimal equivalent?
Something like the opposite of String#to_i:
"0A".to_i(16) #=>10
Like perhaps:
"0A".hex #=>10
I know how to roll my own, but it's probably more efficient to use a built in Ruby function.
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
How about using %/sprintf:
i = 20
"%x" % i #=> "14"