List.Count

Syntax

List.Count(list as list) as number

About

返回指定列表中的项数。

• list：要检查的列表。

示例 1

查找列表 {1， 2， 3} 中的值数。

用法

List.Count({1, 2, 3})

输出

3

示例 2

查找颜色列表中“红色”出现的次数，忽略大小写。

用法

let
    colors = {"Red", "Blue", "GREEN", "red", "Yellow", "RED"},
    redCount = List.Count(
        List.Select(colors, each Text.Lower(_) = "red")
    )
in
    redCount

输出

3

示例 3

查找在客户列表中购买金额超过 100 美元的客户数量。

用法

let
    customers = {
        [CustomerID = 101, CustomerName = "Alice", AmountPurchased = 150],
        [CustomerID = 102, CustomerName = "Bob", AmountPurchased = 75],
        [CustomerID = 103, CustomerName = "Carol", AmountPurchased = 50],
        [CustomerID = 104, CustomerName = "Dave", AmountPurchased = 90],
        [CustomerID = 105, CustomerName = "Eve", AmountPurchased = 120]
    },
    highValueCustomerCount = List.Count(
        List.Select(customers, each [AmountPurchased] > 100)
    )
in
    highValueCustomerCount

输出

2