1.1 KiB
1.1 KiB
title | localeTitle |
---|---|
Count | подсчитывать |
# Любой Возвращает количество элементов в последовательности, удовлетворяющих условию. ### Подпись
Enumerable.Count<TSource> Method (IEnumerable<TSource>, Func<TSource, Boolean>)
## Пример
var fruits = new List<Fruit>() {
new Fruit() { Id = 1, Name = "Orange", Color = "Orange", Quantity: 3 },
new Fruit() { Id = 2, Name = "Strawberry", Color = "Red", Quantity: 12 },
new Fruit() { Id = 3, Name = "Grape", Color = "Purple", Quantity: 25 },
new Fruit() { Id = 4, Name = "Pineapple", Color = "Yellow", Quantity: 1 },
new Fruit() { Id = 5, Name = "Apple", Color = "Red", Quantity: 5 },
new Fruit() { Id = 6, Name = "Mango", Color = "Yellow", Quantity: 2 }
};
// Count of Fruit with Color Red.
var yellowCount = fruits.Count(f => f.Color == "Red"); // 2
// Count of Fruit with Quantity > 2
var quantityOverTwo = fruits.Count(f => f.Quantity > 2); // 4