Is there a way to compare two arrays and show what is common to both of them?
是否有一种方法可以比较两个数组并显示它们的共同之处?
array1 = ["pig", "dog", "cat"]
array2 = ["dog", "cat", "pig", "horse"]
What do I type to show that ["pig", "dog", "cat"] are common between these two arrays?
我输入什么来表示["pig"， "dog"， "cat"]在这两个数组中是常见的?
2 个解决方案
#1
113
You can intersect the arrays using &:
您可以使用&:
array1 & array2
This will return ["pig", "dog", "cat"].
这将返回["猪"，"狗"，"猫"]。
#2
2
Set Intersection. Returns a new array containing elements common to the two arrays, with no duplicates, like:
十字路口。返回一个包含两个数组常见元素的新数组，没有重复，比如:
["pig", "dog", "bird"] & ["dog", "cat", "pig", "horse", "horse"]
# => ["pig", "dog"]
You can also read a blog post about Array coherences
你也可以读一篇关于数组相干的博文
#1
113
You can intersect the arrays using &:
您可以使用&:
array1 & array2
This will return ["pig", "dog", "cat"].
这将返回["猪"，"狗"，"猫"]。
#2
2
Set Intersection. Returns a new array containing elements common to the two arrays, with no duplicates, like:
十字路口。返回一个包含两个数组常见元素的新数组，没有重复，比如:
["pig", "dog", "bird"] & ["dog", "cat", "pig", "horse", "horse"]
# => ["pig", "dog"]
You can also read a blog post about Array coherences
你也可以读一篇关于数组相干的博文