红宝石 |数组交集操作

Array#&()是一个 Array 类方法，它对数组执行集合交集操作。并返回两个数组的共同点。

Syntax: Array.&()

Parameter: Arrays for performing the intersection operation.

Return: Common elements from both the arrays.

示例 #1：

# Ruby code for &() method
# showing intersection operation
   
# declaration of array
a = [18, 22, 33, 4, 5, 6]
   
# declaration of array
b = [5, 4, 22, 1, 88, 9]
   
# declaration of array
c = [18, 22, 33, 40, 50, 6]
   
# a intersecting b
puts "intersection of a and b : #{a & b}\n\n"
   
# a intersecting c
puts "intersection of a and c : #{a & c}\n\n"
   
# b intersecting c
puts "intersection of b and c : #{b & c}\n\n"

输出 ：

intersection of a and b : [22, 4, 5]

intersection of a and c : [18, 22, 33, 6]

intersection of b and c : [22]

示例 #2：

# Ruby code for &() method
# showing intersection operation
   
# declaration of array
a = ["abc", "xyz", "dog"]
   
# declaration of array
b = ["cow", "cat", "dog"]
   
# declaration of array
c = ["cat", "1", "dog"]
   
# a intersecting b
puts "intersection of a and b : #{a & b}\n\n"
   
# a intersecting c
puts "intersection of a and c : #{a & c}\n\n"
   
# b intersecting c
puts "intersection of b and c : #{b & c}\n\n"

输出 ：

intersection of a and b : ["dog"]

intersection of a and c : ["dog"]

intersection of b and c : ["cat", "dog"]