string contains mixed case


string = "This is a test"

if string =~ /[A-Z]/ and string =~ /[a-z]/
  puts "string contains mixed case"
end

1.	Comparing Strings
2.	perform "greater than" and "less than" comparisons:
3.	compare strings with the <=> method
4.	A case-insensitive comparison is possible with casecmp, which has the same possible results as <=> (-1, 0, 1)
5.	Comparing With Regular Expressions
6.	string contains lowercase characters
7.	string contains uppercase characters
8.	string starts with a capital letter
9.	Text Manipulation

string contains mixed case : String comparisons « String « Ruby