Count number of values in array between two input values

Question

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 arra

Answer 1

You can create an extremely clean solution to this problem by utilizing the second property of Array#filter (which sets the this binding given to your callback of choice):

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)