红宝石 |字符串删除！方法

删除！是 Ruby 中的 String 类方法，用于执行删除操作，返回给定的字符串，如果给定的字符串没有被修改，则返回 nil。

Syntax: str.delete!(parameter_list)

Parameters: Here, str is the given string and parameter_list are the specified characters.

Returns: nil if the string not modified.

示例 1：

# Ruby program to demonstrate 
# the delete! method 
       
# Taking a string and 
# using the method
str = "String Counting"
puts str.delete! "ing"

输出：

Str Cout

示例 2：

# Ruby program to demonstrate 
# the delete! method 
       
# Taking a string and 
# using the method
str = "String Counting"
puts str.delete! "ing", "^n"
  
str2 = "Ruby Method"
  
puts str2.delete! "ZXC"

输出：

Strn Countn