// array copying 1 ----------------------------------------
function firstFourItems(array) {
  return array.slice(0, 4);
}

function lastThreeItems(array) {
  return array.slice(-3);
}
// array copying 2  -------------------------------------
function minusLastItem(array) {
  return array.slice(0, -1);
}

function copyFirstHalf(array) {
  let halfIndex = array.length/2;
  return array.slice(0,halfIndex);
}

// squares with map -----------------------------------
function squares(array) {
  return array.map(num => num ** 2);
}

// sort drill -----------------------------------------------
function greatestToLeast(array) {
  return array.sort((a, b) => b - a);
}

// filter drill ---------------------------------------------
function shortWords(array) {
  return array.filter(item => item.length < 5)
}

// find drill -----------------------------------------------
function divisibleBy5(array) {
  return array.find(num => num % 5 === 0);
}