Nested lambda expression

Question

How can I get the Count of Person whose name equals "john" from a List using lambda expressions. How can I create my lambda expression?

List<Persons> persons;
person.Where(p=>p.Name.Equals("John");

Now do I do a count on the returned List or should I nest it?

Guffa · Accepted Answer · 2011-05-16 12:53:35Z

5

Neither. Use the overload of the Count method that takes an expression:

int cnt = person.Count(p => p.Name.Equals("John"));

answered May 16, 2011 at 12:53

Guffa

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Comments

Jeff LaFay · Accepted Answer · 2011-05-16 12:51:05Z

2

person.Where(p=>p.Name.Equals("John")).Count();

answered May 16, 2011 at 12:51

Jeff LaFay

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Brian Driscoll · Accepted Answer · 2011-05-16 12:52:03Z

1

List<Person> persons;
/* code that populates persons list */
int count = persons.Where(p=>p.Name.Equals("John")).Count();

answered May 16, 2011 at 12:52

Brian Driscoll

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