Can I convert IEnumerable to List?

In C#, an IEnumerable can be converted to a List through the following lines of code: IEnumerable enumerable = Enumerable. Range(1, 300); List asList = enumerable. ToList();

How do you convert an object to a List of objects?

“how to convert object to list in java” Code Answer’s. //Assuming that your object is a valid List object, you can use: Collections. singletonList(object) — Returns an immutable list containing only the specified object. //Similarly, you can change the method in the map to convert to the datatype you need.

How do I cast an IEnumerable object?

“convert ienumerable to ienumerable object in c#” Code Answer

  1. But if you do want to use a data table first, you could use LINQ:
  2. var list = dt. AsEnumerable(). Select(r => new Person() {
  3. Name = (string) r[“Name”],
  4. Age = (int) r[“Age”] }

What is IEnumerable List in C#?

IEnumerable is an interface defining a single method GetEnumerator() that returns an IEnumerator interface. It is the base interface for all non-generic collections that can be enumerated. This works for read-only access to a collection that implements that IEnumerable can be used with a foreach statement.

What is the difference between IEnumerable and list?

One important difference between IEnumerable and List (besides one being an interface and the other being a concrete class) is that IEnumerable is read-only and List is not. So if you need the ability to make permanent changes of any kind to your collection (add & remove), you’ll need List.

How do you change an object to an array?

To convert an object to an array you use one of three methods: Object.keys() , Object.values() , and Object.entries() . Note that the Object.keys() method has been available since ECMAScript 2015 or ES6, and the Object.values() and Object.entries() have been available since ECMAScript 2017.

How do you turn an object into a map?

To convert an object to a Map , call the Object. entries() method to get an array of key-value pairs and pass the result to the Map() constructor, e.g. const map = new Map(Object. entries(obj)) . The new Map will contain all of the object’s key-value pairs.

How use Linq cast?

LINQ Cast() Method In LINQ, Cast operator is used to cast/convert all the elements present in a collection into a specified data type of new collection. In case if we try to cast/convert different types of elements (string/integer) in the collection, then the conversion will fail, and it will throw an exception.

Which is faster IEnumerable or list?

IQueryable is faster than IEnumerable. In addition to Munesh Sharma’s answer:IEnumerable loads data in-memory and then apply filters to it one by one but IQueryable apply filters all at once and return the result.