Get the first and second objects from a list using LINQ

Question

I have a list of Person objects. How can I get the first and second Person objects that meet a certain criteria from List<Person> People using LINQ?

Let's say here is the list I've got. How can I get the first and second persons that are over 18 that is James and Jodie.

public class Person
{
    public string Name;
    public int age;
}

var People = new List<Person>
{
   new Person {Name = "Jack", Age = 15},
   new Person {Name = "James" , Age = 19},
   new Person {Name = "John" , Age = 14},
   new Person {Name = "Jodie" , Age = 21},
   new Person {Name = "Jessie" , Age = 19}
}

@Red-arrower! The red-arrow is ridiculous! And to tell the truth I don't care one bit about the reputation. I'm here just for asking and learning :) — Vahid, Jun 05 '14 at 09:24

David Pilkington · Accepted Answer · 2014-06-05T09:32:14.430

5

var topTwo = People.Where(a => a.Age > 18).Take(2).ToArray();

Person p1, p2;
if (topTwo.Any())
{
   p1 = topTwo[0];
   if (topTwo.Count > 1)
       p2 = topTwo[1];
}

edited Jun 05 '14 at 09:32

answered Jun 05 '14 at 09:21

David Pilkington

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@PaulB You are most certainly correct – David Pilkington Jun 05 '14 at 09:25
@DavidPilkington Thanks David, can I get the answer in two different variables? p1 and p2? – Vahid Jun 05 '14 at 09:28

score 2 · Answer 2 · answered Jun 05 '14 at 09:23

You can use the 'Take()' function here.

In your case, the following code will get the first 2 elements:

public class Person
{
    public string Name;
    public int age;
}

var People = new List<Person>
{
    new Person {Name = "Jack", Age = 15},
    new Person {Name = "James" , Age = 19},
    new Person {Name = "John" , Age = 14},
    new Person {Name = "Jodie" , Age = 21},
    new Person {Name = "Jessie" , Age = 19}
}

People.Take(2);

The following code will get you the first 2 element with an age of 18:

public class Person
{
    public string Name;
    public int age;
}

var People = new List<Person>
{
    new Person {Name = "Jack", Age = 15},
    new Person {Name = "James" , Age = 19},
    new Person {Name = "John" , Age = 14},
    new Person {Name = "Jodie" , Age = 21},
    new Person {Name = "Jessie" , Age = 19}
}

People.Where(x => x.Age > 18).Take(2);

score 1 · Answer 3 · answered Jun 05 '14 at 09:22

1

var firstTwo = People.Where(a => a.Age > 18).Take(2);

answered Jun 05 '14 at 09:22

PaulB

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Is not it the same answer as earlier posted by @David Pilkington. – Durgesh Chaudhary Jun 05 '14 at 09:24

Get the first and second objects from a list using LINQ

3 Answers3