Quick Answer: What Are Indexers In C#?

What is the yield keyword used for in C#?

The yield keyword performs custom and stateful iteration and returns each element of a collection one at a time sans the need of creating temporary collections.

The yield keyword, first introduced in C# 2.0, T returns an object that implements the IEnumerable interface..

Can we overload indexer in C#?

Like functions, Indexers can also be overloaded. In C#, we can have multiple indexers in a single class. To overload an indexer, declare it with multiple parameters and each parameter should have a different data type. … Here int and string types are used to overload the indexer.

What is namespace C#?

Advertisements. A namespace is designed for providing a way to keep one set of names separate from another. The class names declared in one namespace does not conflict with the same class names declared in another.

What is tuple with example?

9.1. Tuples are used for grouping data This is an example of a data structure — a mechanism for grouping and organizing data to make it easier to use. … A tuple lets us “chunk” together related information and use it as a single thing. Tuples support the same sequence operations as strings.

How do I return a tuple in C#?

To return the tuple, you simply use the return statement as normal. // Obtain a multiple entry tuple. Tuple[] myTuple = getTuple(); // Output the values.

What do you mean by indexers?

0. 0. (computing, programming.NET) A special property of a class allowing objects of the class to be accessed by index as though they were arrays or hash tables. noun.

Why do we use indexers in C#?

The indexer enables direct access to the instance tempRecord[i] . The alternative to using the indexer is to declare the array as a public member and access its members, tempRecord. temps[i] , directly. Notice that when an indexer’s access is evaluated, for example, in a Console.

What are tuples in C #?

The Tuple class was introduced in . NET Framework 4.0. A tuple is a data structure that contains a sequence of elements of different data types. It can be used where you want to have a data structure to hold an object with properties, but you don’t want to create a separate type for it.

What are Properties C#?

A property is a member that provides a flexible mechanism to read, write, or compute the value of a private field. Properties can be used as if they are public data members, but they are actually special methods called accessors.

What is reflection C#?

Reflection in C# is used to retrieve metadata on types at runtime. … In using reflection, you get objects of the type “Type” that can be used to represent assemblies, types, or modules. You can use reflection to create an instance of a type dynamically and even invoke methods of the type.

What is dynamic type in C#?

C# 4 introduces a new type, dynamic . The type is a static type, but an object of type dynamic bypasses static type checking. In most cases, it functions like it has type object . At compile time, an element that is typed as dynamic is assumed to support any operation.

What is an indexer machine?

An indexing head, also known as a dividing head or spiral head, is a specialized tool that allows a workpiece to be circularly indexed; that is, easily and precisely rotated to preset angles or circular divisions. … The workpiece is held in the indexing head in the same manner as a metalworking lathe.

What are indexes in SQL?

An index is an on-disk structure associated with a table or view that speeds retrieval of rows from the table or view. … These keys are stored in a structure (B-tree) that enables SQL Server to find the row or rows associated with the key values quickly and efficiently.

What are indexers in C#?

The C# programming language includes support for indexers — a feature that enables you to use an object just as an array. Indexers are also known as smart arrays and can be defined similar to how a property is defined. The MSDN states: “Indexers allow instances of a class or struct to be indexed just like arrays.

Can properties be private in C#?

Properties can be marked as public , private , protected , internal , protected internal or private protected . These access modifiers define how users of the class can access the property. The get and set accessors for the same property may have different access modifiers.

What’s the difference between list and tuple?

List and Tuple in Python are the class of data structure. The list is dynamic, whereas tuple has static characteristics. … Tuple is also a sequence data type that can contain elements of different data types, but these are immutable in nature. In other words, a tuple is a collection of Python objects separated by commas.

What does => mean in C#?

The => token is supported in two forms: as the lambda operator and as a separator of a member name and the member implementation in an expression body definition.

What are events in C#?

Events enable a class or object to notify other classes or objects when something of interest occurs. The class that sends (or raises) the event is called the publisher and the classes that receive (or handle) the event are called subscribers.

What is delegate in C#?

A delegate is a type that represents references to methods with a particular parameter list and return type. When you instantiate a delegate, you can associate its instance with any method with a compatible signature and return type. You can invoke (or call) the method through the delegate instance.

What are collections in C#?

Advertisements. Collection classes are specialized classes for data storage and retrieval. These classes provide support for stacks, queues, lists, and hash tables. Most collection classes implement the same interfaces.

What is the difference between properties and indexer in C#?

Properties are invoked through a described name and can be declared as a static or an instance member. Indexers in C# are data members that act as an array and allow you to access data within objects to be indexed in the same way.