Ruby/String/slice

s = "My kingdom for a string!"
s.slice(-7,3)                      # => "str"
s[-7,6]                            # => "string"

string = "My first string"                   # => "My first string"
 
string.slice(3, 5)                        # => "first"

s = "My kingdom for a string!"
s.slice(3)                         # => 107
s[3]                               # => 107
107.chr                            # => "k"
s.slice(3,1)                       # => "k"
s[3,1]                             # => "k"