Ruby 数组差分(-)函数

Array#-()是一个数组类的方法，它通过删除两个数组中的相似元素来执行集合差异操作。

语法。Array.-()

参数。用于执行连接操作的数组。

返回。通过删除两个数组中的相同元素而产生的新数组。

例子 #1 :

# Ruby code for -() method
# showing concatenate operation
  
# declaring array
a = [18, 22, 33, 4, 5, 6]
  
# declaring array
b = [5, 4, 22, 1, 88, 9]
  
# declaring array
c = [18, 22, 33, 40, 50, 6]
  
# differencing arrays
puts "difference of a and b : #{a - b}\n\n"
  
# differencing arrays
puts "difference of a and c : #{a - c}\n\n"
  
# differencing arrays
puts "difference of b and c : #{b - c}\n\n"

输出:

difference of a and b : [18, 33, 6]

difference of a and c : [4, 5]

difference of b and c : [5, 4, 1, 88, 9]

例子 #2 :

# Ruby code for -() method
# showing concatenate operation
  
# declaring array
a = ["abc", "xyz", "dog"]
  
# declaring array
b = ["cow", "cat", "dog"]
  
# declaring array
c = ["cat", "1", "dog"]
  
# differencing arrays
puts "difference of a and b : #{a - b}\n\n"
  
# differencing arrays
puts "difference of a and c : #{a - c}\n\n"
  
# differencing arrays
puts "difference of b and c : #{b - c}\n\n"

输出:

difference of a and b : ["abc", "xyz"]

difference of a and c : ["abc", "xyz"]

difference of b and c : ["cow"]