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Ruby | String casecmp Method

  • Last Updated : 08 Jan, 2020

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 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 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
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