红宝石 |字符串 casecmp?方法

案例cmp？是 Ruby 中的 String 类方法，用于在 Unicode 大小写折叠后两个字符串相等时返回true ，如果不相等则返回false 。

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 numbers 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.

示例 1：

# Ruby program to demonstrate
# the casecmp? method
   
# Taking a string and
# using the method
puts "RuBy".casecmp?("ruby")
puts "GeeksforGeeks".casecmp?("gfg")

输出：

true
false

示例 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")

输出：

false