When to use IComparer?

Use IComparable when the class has an intrinsic comparison. Use IComparer when you want a comparison method other than the class’ intrinsic comparison, if it has one. It depends on the entity. For example following for a class like “Student”, it will make sense to have IComparable based on Name.

What is the difference between comparable and IComparer?

As the name suggests, IComparable reads out I’m comparable. IComparable when defined for T lets you compare the current instance with another instance of same type. IComparer is used to compare any two instances of T , typically outside the scope of the instances of T .

What is IComparer in C#?

IComparer interface provides Compare method that Compares two objects and returns a value indicating whether one is less than, equal to, or greater than the other. A class that implements the IComparer interface must provide a Compare method that compares two objects.

What is ienumerable IComparable and IComparer interface in c#?

IComparable and IComparer interface is used when a class has a data member as an array of object of any other class. For the ordered data types like numbers or strings, comparison can be done easily. As there can be many different data membersfor the object, comparison of two objects cannot be done directly.

What is comparator C#?

Use the IComparable Interface in C# to sort elements. It is also used to compare the current instance with another object of same type. It provides you with a method of comparing two objects of a particular type. Remember, while implementing the IComparable interface, CompareTo() method should also be implemented.

How do you implement IComparable?

The IComparable is implemented by types whose values can be ordered or sorted. The interface requires the CompareTo method to be implemented. The implemented method is automatically called by methods such as Array. Sort and ArrayList.

What is CompareTo C#?

CompareTo() Method in C# CompareTo() method in C# is used to compare this instance to a specified object or another Int16 instance and returns an integer that indicates whether the value of this instance is less than, equal to, or greater than the value of the specified object or the other Int16 instance.

What is IComparable C#?

Why do we use IComparable in C#?

Use the IComparable Interface in C# to sort elements. It is also used to compare the current instance with another object of same type. It provides you with a method of comparing two objects of a particular type.

What is IEnumerator C#?

IEnumerable in C# is an interface that defines one method, GetEnumerator which returns an IEnumerator interface. This allows readonly access to a collection then a collection that implements IEnumerable can be used with a for-each statement.

Why IComparable is used in C#?

What is params in C#?

In C#, params is a keyword which is used to specify a parameter that takes variable number of arguments. It is useful when we don’t know the number of arguments prior. Only one params keyword is allowed and no additional parameter is permitted after params keyword in a function declaration.

How does the IComparer interface work in C #?

IComparer interface provides Compare method that Compares two objects and returns a value indicating whether one is less than, equal to, or greater than the other. A class that implements the IComparer interface must provide a Compare method that compares two objects.

What’s the difference between IComparer and compareTo?

IComparable – Defines an interface for an object with a CompareTo() method that takes another object of the same type and compares the current object to the passed one. It internalizes the comparison to the object, allowing for a more inline comparison operation, and is useful when there’s only one logical way,…

When do you need an IComparer < T >?

IComparer can be useful when you require sorting based on a custom order, but not as a general rule. For instance, in a class of Person at some point you might require to Sort people based on their age. In that case you can do: Now the AgeComparer helps in sorting a list based on Age.

What’s the difference between IComparable and IComparer stack?

IComparable is implemented by the object that is being compared, for the purpose of comparing with another one of itself. It is a good idea to implement IComparable for sorting objects. IComparable can be useful for sorting by different criteria (for example, sorting by a selectable field in the object).