红宝石 |字符串 casecmp 方法

casecmp是 Ruby 中的 String 类方法，它是 String#<=> 的不区分大小写版本。目前，不区分大小写仅适用于字符AZ/az，而不适用于所有 Unicode字符。这个方法和casecmp不同！方法。

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.

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：

0
-1

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：

1