Determine if all elements fulfil a condition in a sequence with LINQ C#

Say we have the following string 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"};

Say we’d like to determine if all elements in the sequence fulfil a certain condition. Nothing could be easier using the All operator:

bool all = bands.All(b => b.StartsWith("A"));
Console.WriteLine(all);

This yields false as not all band names start with an A. However, their length is certainly longer than 2 characters so the below query returns true:

bool all = bands.All(b => b.Length > 2);
Console.WriteLine(all);

You can view all LINQ-related posts on this blog here.

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

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