Sorting custom structure array in GoLang

<p><img src="https://img.php.cn/upload/article/000/000/164/170740497113136.jpg" alt="在 GoLang 中对自定义结构体数组进行排序"></p> <p>In GoLang, sorting custom structure arrays is a common requirement. By comparing and exchanging elements in the array, we can sort the structure array according to specific rules. During the sorting process, we can use different sorting algorithms, such as bubble sort, insertion sort, or quick sort, etc. No matter which algorithm is used, we can compare based on a certain field of the structure to achieve the sorting operation. In this article, we will introduce how to sort a custom structure array in GoLang, as well as some common sorting tips and considerations. </p> <h2 class="daan">Question content</h2> <p>How to use golang to sort a custom structure array. </p> <p>My code is: </p> <pre class="brush:php;toolbar:false;">package main import "fmt" type ticketdistribution struct { label string ticketvolume int64 } type ticketdistributionresponse struct { leveldistribution []*ticketdistribution } func main() { var response ticketdistributionresponse response.leveldistribution = append(response.leveldistribution, &ticketdistribution{label: "john", ticketvolume: 3}) response.leveldistribution = append(response.leveldistribution, &ticketdistribution{label: "bill", ticketvolume: 7}) response.leveldistribution = append(response.leveldistribution, &ticketdistribution{label: "sam", ticketvolume: 4}) for _, val := range response.leveldistribution { fmt.println(*val) } }</pre> <p>This prints the output as </p> <pre class="brush:php;toolbar:false;">{john 3} {bill 7} {sam 4}</pre> <p>I want to sort the <strong>response</strong> objects in descending order by <strong>ticketvolume</strong> value. </p> <p>After sorting, the response object should look like this: </p> <pre class="brush:php;toolbar:false;">{Bill 7} {Sam 4} {John 3}</pre><h2 class="daan">Workaround</h2> <p>You can use <a href="https://www.php.cn/link/ad0efad9dd0abaec4b8f9aaa489ec2f1" rel="nofollow noreferrer"><code>sort.slice</code></a> to achieve this. It requires your slicing and sorting functions. The sort function itself takes two indices and returns true if the item <strong> on the left is less than the item </strong> on the right. </p> <p>This way you can sort by your own custom criteria. </p> <pre class="brush:php;toolbar:false;">package main import ( "fmt" "sort" ) type TicketDistribution struct { Label string TicketVolume int64 } type TicketDistributionResponse struct { LevelDistribution []*TicketDistribution } func main() { var response TicketDistributionResponse response.LevelDistribution = append(response.LevelDistribution, &TicketDistribution{Label: "John", TicketVolume: 3}) response.LevelDistribution = append(response.LevelDistribution, &TicketDistribution{Label: "Bill", TicketVolume: 7}) response.LevelDistribution = append(response.LevelDistribution, &TicketDistribution{Label: "Sam", TicketVolume: 4}) sort.Slice(response.LevelDistribution, func(i, j int) bool { a := response.LevelDistribution[i] b := response.LevelDistribution[j] return a.TicketVolume > b.TicketVolume }) for _, val := range response.LevelDistribution { fmt.Println(*val) } }</pre> <p>Use <code>></code> in the comparison function to sort the slices in descending order, for ascending order you can use <code><</code>. </p>

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