Let’s take a look at how Golang implements intersection

Golang language is a powerful programming language with excellent features such as efficiency, scalability and ease of learning. As a Golang enthusiast, have you ever encountered a situation where you need to find the intersection of two arrays? In fact, it is a very common scenario to operate arrays to find intersection. Let's take a look at how Golang implements intersection!

1. Traverse each element of the two arrays

First, we need to traverse each element of the two arrays through a double-layer for loop. We can iterate through the first array and then compare the elements in the second array with it one by one to see if there are duplicate values.

2. Determine whether an element exists

When comparing two elements for equality, we can use the == operator provided by Golang. If two elements are equal, the element is added to the resulting array. However, it should be noted that if there are multiple identical elements in the two arrays, there should also be corresponding duplicate elements in the obtained intersection array.

3. Return the result

Finally, we can return the result array.

The following is a sample code for finding intersection in Golang:

func intersection(nums1 []int, nums2 []int) []int {
    var res []int
    for i := 0; i < len(nums1); i++ {
        for j := 0; j < len(nums2); j++ {
            if nums1[i] == nums2[j] {
                res = append(res, nums1[i])
            }
        }
    }
    return res
}

It should be noted that the time complexity of this method is O(n^2), which is not efficient. When the array size is large, Performance may be affected. If you need a more efficient intersection method, you can use Golang's map implementation.

func intersection(nums1 []int, nums2 []int) []int {
    set := make(map[int]bool)
    for _, v := range nums1 {
        set[v] = true
    }
    var res []int
    for _, v := range nums2 {
        if set[v] {
            res = append(res, v)
            set[v] = false
        }
    }
    return res
}

Above, we can achieve the intersection of arrays in Golang through two methods. Different intersection methods are suitable for different scenarios and need to be selected according to the actual situation.

Summary

This article explains two methods for finding intersection of arrays in Golang, including traversal comparison and use of map. In practical applications, we need to choose a method that suits us according to the specific situation. As a rapidly developing programming language, Golang language has high efficiency and performance in processing various data information. I believe that the sharing of this article can help you learn and apply the Golang language.

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