arrayFunctions.js

/**
 * isArrayLengthOdd(numbers):
 * - receives array `numbers`
 * - returns true if array has an odd number of elements
 * - returns false otherwise
 *
 * e.g.
 * isArrayLengthOdd([1, 2, 3]) -> true
 * isArrayLengthOdd([1, 2, 3, 4]) -> flase
 */
function isArrayLengthOdd(numbers) {
  if (numbers.length % 2 == 0) {
    return false;
  } else {
    return true;
  }
}
let arrayOdd = [1, 2, 3, 4];
console.log(isArrayLengthOdd(arrayOdd));

/**
 * isArrayLengthEven(numbers):
 * - receives array `numbers`
 * - returns true if array has an even number of elements
 * - returns false otherwise
 *
 * e.g.
 * isArrayLengthEven([1, 2, 3]) -> false
 * isArrayLengthEven([1, 2, 3, 4]) -> true
 */
function isArrayLengthEven(numbers) {
  if (numbers.length % 2 == 0) {
    return true;
  } else {
    return false;
  }
}
let arrayEven = [1, 2, 3, 4];
console.log(isArrayLengthEven(arrayEven));
/**
 * addLailaToArray(instructors):
 * - receives array `instructors`
 * - returns a new array that's a copy of array `instructors` with additional string "Laila"
 *
 * e.g.
 * addLailaToArray(["Mshary", "Hasan"]) -> ["Mshary", "Hasan", "Laila"]
 */
function addLailaToArray(instructor) {
  // Your code here
  instructor.push("Laila");
  return instructor;
}
let instructors = ["Mshary", "Hassan"];
addLailaToArray(instructors);
console.log(addLailaToArray(["Mshary", "Hasan"]));

/**
 * eliminateTeam(teams):
 * - receives array `teams`
 * - removes the last element from the array and return it
 *
 * e.g.
 * eliminateTeam(["Brazil", "Germany", "Italy"]) -> "Italy"
 */
function eliminateTeam(teams) {
  return teams.pop();
}

let teams = ["Brazil", "Germany", "Italy"];
//eliminateTeam(teams);
console.log(eliminateTeam(teams));
/**
 * secondHalfOfArrayIfItIsEven(fruits):
 * - receives array `fruits`
 * - returns a new array that's the second half of the original array if it has an even number of elements
 * - returns an empty array if it has an odd number of elements
 *
 * e.g.
 * secondHalfOfArrayIfItIsEven(["apple", "orange", "banana", "kiwi"]) -> ["banana", "kiwi"]
 * secondHalfOfArrayIfItIsEven(["apple", "orange", "banana", "kiwi", "blueberry"]) -> []
 */
function secondHalfOfArrayIfItIsEven(fruits) {
  // Your code here
  if (fruits.length % 2 == 0) {
    let half = fruits.length / 2;
    return fruits.slice(half);
  } else {
    fruits.splice(0, fruits.length);
    return fruits;
  }
}
let array12 = [1, 2, 3, 4];
// secondHalfOfArrayIfItIsEven(array12);
console.log(secondHalfOfArrayIfItIsEven(array12));
/**
 * youGottaCalmDown(shout):
 * - receives a string `shout`
 * - returns the string `shout` with at most one exclamation mark (!) at the end.
 *
 * e.g.
 * youGottaCalmDown("HI!!!!!!!!!!") -> "HI!"
 * youGottaCalmDown("Taylor Schwifting!!!!!!!!!!!") -> "Taylor Shwifting!"
 * youGottaCalmDown("Hellooooo") -> "Hellooooo"
 *
 * Hint:
 * - Use number method .indexOf()
 * - Use string method .slice()
 */
function youGottaCalmDown(shout) {
  let index = shout.indexOf("!");
  if (index == -1) {
    return shout;
  } else {
    return shout.slice(0, index + 1);
  }
}

let shout = "HI!!!!!!!!!!";
console.log(youGottaCalmDown(shout));