نطاق ترشيح

الرجوع الي الدرس

Write a function filterRange(arr, a, b) that gets an array arr, looks for elements with values higher or equal to a and lower or equal to b and return a result as an array.

مثال:

          let arr = [5, 3, 8, 1];

let filtered = filterRange(arr, 1, 4);

alert(filtered); // 3,1 (matching values)

alert(arr); // 5,3,8,1 (not modified)

افتح sandbox بالإختبارات.

function filterRange(arr, a, b) {
  // added brackets around the expression for better readability
  return arr.filter(item => (a <= item && item <= b));
}

let arr = [5, 3, 8, 1];

let filtered = filterRange(arr, 1, 4);

alert( filtered ); // 3,1 (matching values)

alert( arr ); // 5,3,8,1 (not modified)

افتح الحل الإختبارات في sandbox.