When should you use golang methods?

<p>Generic methods can parameterize algorithms and are suitable for different types of data. Use cases include: general data processing (sorting, filtering, mapping) algorithm optimization (improving performance for specific types) reusability (creating reusable methods that work for multiple types) </p> <p><img src="https://img.php.cn/upload/article/000/000/164/171401670363563.jpg" alt="什么时候应该使用 golang 方法？"></p> <p><strong>When to use Go generic methods? </strong></p> <p>Generic methods allow you to parameterize the same algorithm using different types. They can be declared by specifying type parameters in the method signature. </p> <p><strong>Syntax</strong></p><pre class='brush:go;toolbar:false;'>func <type_parameter_list> <func_name>(<parameter_list>) <return_type_list></pre><p><strong>Use cases</strong></p> <p>Here are the situations where you might want to use generic methods:</p> <ul> <li> <strong>General Data Processing: </strong>Write methods that can perform operations on different types of data, such as sorting, filtering, and mapping. </li> <li> <strong>Optimization algorithm: </strong>Using generic methods can optimize algorithms for specific types and improve performance. </li> <li> <strong>Reusability: </strong>Create reusable methods that work on various types, reducing duplicate code. </li> </ul> <p><strong>Practical case</strong></p> <p>We create an example generic method to compare the size of elements in two slices: </p><pre class='brush:go;toolbar:false;'>func Min[T constraints.Ordered](a, b []T) []T { if len(a) < len(b) { return a } return b }</pre><p>It uses <code>constraints.Ordered</code> constraints to ensure that the <code>T</code> type implements the <code>Ordered</code> interface, which defines the <code><</code> operator. Now we can use this method for different types like: </p><pre class='brush:go;toolbar:false;'>fmt.Println(Min([]int{1, 2, 3}, []int{4, 5, 6})) // [1 2 3] fmt.Println(Min([]string{"a", "b", "c"}, []string{"d", "e", "f"})) // [a b c]</pre>

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