Get a list of Enum members. Correlates the elements of two sequences based on matching keys.
What is yield and how does it work in C#? - PVS-Studio Applies an accumulator function over a sequence. Anonymous types enable the select clause in a LINQ query expression to transform objects of the original sequence into objects whose value and shape may differ from the original. When a yield method returns an IEnumerable type object, this object implements both IEnumerable and IEnumerator.
IEnumerable<T> Interface (System.Collections.Generic) Let's talk about one of my favorite .NET features: IEnumerable. How to convert a sequence of integers into a monomial. didTheCodeRun = true; Is it possible to control it remotely? More info about Internet Explorer and Microsoft Edge, Use object initializers (style rule IDE0017), Use collection initializers (style rule IDE0028). IEnumerable is a 'streaming' data type, so think of it like a stream instead of an array. See: How to get item from IEnumerable collection using its index in C#? Returns elements from a sequence as long as a specified condition is true. Enumerates a sequence and produces an immutable hash set of its contents. These two different ways to initialize associative collections have slightly different behavior because of the method calls the compiler generates. Some of the answers above suggest using IList instead of IEnumerable. Returns distinct elements from a sequence according to a specified key selector function and using a specified comparer to compare keys. 1) in the first paragraph, explicitly cast it to an array with .ToArray() a cast usually refers to a compile-time operation which affects the virtual methods invoked on the object. You can iterate as much or as little as you want. Converts an IEnumerable to an IQueryable. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Asking for help, clarification, or responding to other answers. Determines whether any element of a sequence satisfies a condition. typeof(IEnumerable).IsAssignableFrom(property.PropertyType) but now that i know that the type is a collection. Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. But there are a few things that make IEnumerable specialand a few things that make it tricky. Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. Creates a Lookup
from an IEnumerable according to a specified key selector function. 1. Returns distinct elements from a sequence according to a specified key selector function. When you call GetOneTwoThree(), youll get a return value despite the fact that none of the code in the function has actually been executed yet! This interface enables iterating over a collection. Returns the last element of a sequence, or a default value if the sequence contains no elements. Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. Invokes a transform function on each element of a sequence and returns the maximum Int32 value. The element initializers can be a simple value, an expression, or an object initializer. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. c# - Return IEnumerable<KeyValuePair> from a private method; use Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. Attempts to determine the number of elements in a sequence without forcing an enumeration. Thanks for contributing an answer to Stack Overflow! Enumerates and transforms a sequence, and produces an immutable dictionary of its contents. Returns a collection of nodes that contains all nodes in the source collection, sorted in document order. The 10 Most Common Mistakes in C# Programming | Toptal Some information relates to prerelease product that may be substantially modified before its released. Inverts the order of the elements in a sequence. Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists. This may seem counterintuitive, but in a lot of cases its a good thing. Invokes a transform function on each element of a sequence and returns the minimum Double value. Code for adding to IEnumerable in C# - iditect.com Think of IEnumerable<T> as a factory for creating IEnumerator<T>. How a top-ranked engineering school reimagined CS curriculum (Ep. Using LINQ you can get all customers names (values) having specific value in this way: var valuesList = items.Where(x => x.Something == myVar).Select(v => v.Name).ToList(); For single customer name you can do this: Making statements based on opinion; back them up with references or personal experience. in a customized tabular view.. you cant lazily initialize a dictionary from a collection. 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