WebOct 22, 2024 · var comparer = new ObjComparer(); var item = total_objs.FirstOrDefault(f => comparer.Equals(f, obj1)); Note that you don't really need IEqualityComparer for finding items. You can use a simple lambda. Also, generally you don't implement IEqualityComparer on a standalone type. It is generally implemented by the type that needs it. Web以下函数AssignIfDiff可以在变量与参数不同的情况下为其分配变量，该函数适用于简单类型。 但是，似乎复杂类型有问题吗 如何使其适用于复杂类型 adsbygoogle window.adsbygoogle .push

c# - How to use the IEqualityComparer - Stack Overflow

WebFeb 8, 2024 · Default.Equals(this. _id, other. _id)) { return EqualityComparer . Default.Equals(this. _lastName, other. _lastName); } return false; } One important feature of record types is that when using these equality operators, it is checking the actual data values of the objects, not their instances. Very cool! Object HashCode WebSep 16, 2015 · Your code is efficient. Why not expose an overload allowing the caller to pass in a comparer? public static bool EqualsAll(this IList a, IList b) { return EqualsAll(a, b, null); // there is a slight performance gain in passing null here. is a leap year quadrennial

Create EqualityComparer inline. Is this possible?

WebIEqualityComparer introduces a custom GetHashCode method. We implement this interface in the C# language. We also measure performance. We compare GetHashCode methods on custom string keys. We use it with the Dictionary type. Note: You can implement the IEqualityComparer interface for the Dictionary collection. http://duoduokou.com/csharp/60081725768920540707.html Web那个么，有并没有更好的方法将每个元素转换成字符串，将它们连接起来，并完成我展示的使用字符串可以完成的事情呢 is a learning center a school