Finding the maximum value in a sequence with LINQ C#

Finding the maximum value in a sequence can be performed using the Max LINQ operator. In it simplest, parameterless form it works on numeric sequences like this:

List<int> integers = new List<int>() { 54, 23, 76, 123, 93, 7, 3489 };
int intMax = integers.Max();

…which gives 3489.

Applying the operator on a list of strings gives the alphabetically maximum value in the list:

string[] bands = { "ACDC", "Queen", "Aerosmith", "Iron Maiden", "Megadeth", "Metallica", "Cream", "Oasis", "Abba", "Blur", "Chic", "Eurythmics", "Genesis", "INXS", "Midnight Oil", "Kent", "Madness", "Manic Street Preachers"			 , "Noir Desir", "The Offspring", "Pink Floyd", "Rammstein", "Red Hot Chili Peppers", "Tears for Fears"						 , "Deep Purple", "KISS"};
string stringMax = bands.Max();

…which yields “The Offspring”.

The operator can be applied to sequences of custom objects:

public class Singer
{
	public int Id { get; set; }
	public string FirstName { get; set; }
	public string LastName { get; set; }
	public int BirthYear { get; set; }
}

IEnumerable<Singer> singers = new List<Singer>() 
{
	new Singer(){Id = 1, FirstName = "Freddie", LastName = "Mercury", BirthYear=1964}
	, new Singer(){Id = 2, FirstName = "Elvis", LastName = "Presley", BirthYear = 1954}
	, new Singer(){Id = 3, FirstName = "Chuck", LastName = "Berry", BirthYear = 1954}
	, new Singer(){Id = 4, FirstName = "Ray", LastName = "Charles", BirthYear = 1950}
	, new Singer(){Id = 5, FirstName = "David", LastName = "Bowie", BirthYear = 1964}
};

int maxSingerBirthYear = singers.Max(s => s.BirthYear);

We applied a selector function to find the highest birth year, i.e. 1964. We can find the maximum first name alphabetically speaking:

String maxSingerName = singers.Max(s => s.FirstName);

…which gives “Ray”.

View the list of posts on LINQ here.

Advertisements

About Andras Nemes
I'm a .NET/Java developer living and working in Stockholm, Sweden.

One Response to Finding the maximum value in a sequence with LINQ C#

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

ultimatemindsettoday

A great WordPress.com site

Elliot Balynn's Blog

A directory of wonderful thoughts

Softwarearchitektur in der Praxis

Wissenswertes zu Webentwicklung, Domain-Driven Design und Microservices

Technology Talks

on Microsoft technologies, Web, Android and others

Software Engineering

Web development

Disparate Opinions

Various tidbits

chsakell's Blog

WEB APPLICATION DEVELOPMENT BEST PRACTICES WITH MICROSOFT STACK & ANGULAR

Cyber Matters

Bite-size insight on Cyber Security for the not too technical.

Guru N Guns's

OneSolution To dOTnET.

Johnny Zraiby

Measuring programming progress by lines of code is like measuring aircraft building progress by weight.

%d bloggers like this: