Ruby | String casecmp Method

casecmp is a String class method in Ruby which is Case-insensitive version of String#<=>. For now, case-insensitivity only works on characters A-Z/a-z, not all of the Unicode characters. This method is different from casecmp! method.

Syntax: str.casecmp(other_str) Parameters: Here, str is the given string to be checked and other_str is the string to which str is compared. Returns:This method will returns the true or false based on the equality of the str and other_str. It can also return nil if the two strings have incompatible encodings, or if other_str is not a string.

Example 1: Ruby

# Ruby program to demonstrate
# the casecmp method

# Taking a string and
# using the method
puts "RuBy".casecmp("ruby")
puts "GeeksforGeeks".casecmp("gfg")

Output:

0
-1

Example 2: Ruby

# Ruby program to demonstrate
# the casecmp method

# Taking a string and
# using the method
# here it will give nil
puts "\u{e5 f6 dc}".encode("ISO-8859-1").casecmp("\u{c4 d4 de}")

puts "GFG".casecmp("250")

Output:

1