(function () {
  console.log('starting task 8');
  function reverseArray (arr) {
    var newArr = [];
    arr.forEach(function(e) {
      newArr.unshift(e);
    });
    return newArr;
  }

  function reverseArrayInPlace(arr) {
    var temp;
    for(var begin = 0, end = arr.length; end--; begin++) {
      if (begin > end) {
        break;
      }
      temp = arr[begin];
      arr[begin] = arr[end];
      arr[end] = temp;
    }
  }

  console.log('test reverseArray([1,2,3]), res:', reverseArray([1,2,3]).toString() === '3,2,1');
  console.log('test reverseArray([1,2]), res:', reverseArray([1,2]).toString() === '2,1');
  console.log('test reverseArray([]), res:', reverseArray([]).toString() === '');
  console.log('test reverseArray([1]), res:', reverseArray([1]).toString() === '1');
  console.log('test reverseArray([1,2,3,4]), res:', reverseArray([1,2,3,4]).toString() === '4,3,2,1');

  var arr;
  arr = [1,2,3,4];
  reverseArrayInPlace(arr);
  console.log('test reverseArrayInPlace([1,2,3,4]), res:', arr.toString() === '4,3,2,1');
  arr = [1,2,3];
  reverseArrayInPlace(arr);
  console.log('test reverseArrayInPlace([1,2,3]), res:', arr.toString() === '3,2,1');
  arr = [1,2];
  reverseArrayInPlace(arr);
  console.log('test reverseArrayInPlace([1,2]), res:', arr.toString() === '2,1');
  arr = [1];
  reverseArrayInPlace(arr);
  console.log('test reverseArrayInPlace([1]), res:', arr.toString() === '1');
  arr = [];
  reverseArrayInPlace(arr);
  console.log('test reverseArrayInPlace([]), res:', arr.toString() === '');
}())