Filter range
importance: 4
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.
The function should not modify the array. It should return the new array.
For instance:
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)
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)