如何判断一个数组是否是另一个数组的子集,而不考虑元素的顺序?
a1 = [3, 6, 4]
a2 = [1, 2, 3, 4, 5, 6, 7, 8, 9]
...?
a1 is a subset of a2
如何判断一个数组是否是另一个数组的子集,而不考虑元素的顺序?
a1 = [3, 6, 4]
a2 = [1, 2, 3, 4, 5, 6, 7, 8, 9]
...?
a1 is a subset of a2
使用布景.然后你可以用set.subset?
.例子:
require 'set'
a1 = Set[3,6,4]
a2 = Set[1,2,3,4,5,6,7,8,9]
puts a1.subset?(a2)
输出:
true
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