计算两个输入值之间的数组中的值数

问题描述

正如标题所示，我想创建一个函数来计算用户输入的两个值之间数组中的值数量.因此，例如，如果数组是[1, 4, 6, 7, 8, 6]，并且用户输入5作为他们的第一个值，并且输入7作为他们的第二个值，则会向他们发出警告，提示说

As the title suggests, I want to create a function the counts the number of values in my array between two values that have been entered by the user. So for example, if the array was [1, 4, 6, 7, 8, 6] and the user entered 5 as their first value and 7 as their second value, they would be greeted with an alert that said

推荐答案

您可以利用 Array#filter (设置为选择的回调提供的this绑定):

var array = [1, 4, 6, 7, 8, 6]

function inRange (x) {
  return this[0] <= x && x <= this[1]
}

var result = array.filter(inRange, [5, 7]).length

console.log('Total number of values:', result)

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