freeCodeCamp/curriculum/challenges/chinese-traditional/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/seek-and-destroy.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
a39963a4c10bc8b4d4f06d7e	過濾數組元素	1	16046	seek-and-destroy

--description--

You will be provided with an initial array as the first argument to the destroyer function, followed by one or more arguments. 從初始數組中移除所有與後續參數相等的元素。

The function must accept an indeterminate number of arguments, also known as a variadic function. You can access the additional arguments by adding a rest parameter to the function definition or using the arguments object.

--hints--

destroyer([1, 2, 3, 1, 2, 3], 2, 3) 應返回 [1, 1]。

assert.deepEqual(destroyer([1, 2, 3, 1, 2, 3], 2, 3), [1, 1]);

destroyer([1, 2, 3, 5, 1, 2, 3], 2, 3) 應返回 [1, 5, 1]。

assert.deepEqual(destroyer([1, 2, 3, 5, 1, 2, 3], 2, 3), [1, 5, 1]);

destroyer([3, 5, 1, 2, 2], 2, 3, 5) 應返回 [1]。

assert.deepEqual(destroyer([3, 5, 1, 2, 2], 2, 3, 5), [1]);

destroyer([2, 3, 2, 3], 2, 3) 應返回 []。

assert.deepEqual(destroyer([2, 3, 2, 3], 2, 3), []);

destroyer(["tree", "hamburger", 53], "tree", 53) 應返回 ["hamburger"]。

assert.deepEqual(destroyer(['tree', 'hamburger', 53], 'tree', 53), [
  'hamburger'
]);

destroyer(["possum", "trollo", 12, "safari", "hotdog", 92, 65, "grandma", "bugati", "trojan", "yacht"], "yacht", "possum", "trollo", "safari", "hotdog", "grandma", "bugati", "trojan") 應返回 [12,92,65]。

assert.deepEqual(
  destroyer(
    [
      'possum',
      'trollo',
      12,
      'safari',
      'hotdog',
      92,
      65,
      'grandma',
      'bugati',
      'trojan',
      'yacht'
    ],
    'yacht',
    'possum',
    'trollo',
    'safari',
    'hotdog',
    'grandma',
    'bugati',
    'trojan'
  ),
  [12, 92, 65]
);

--seed--

--seed-contents--

function destroyer(arr) {
  return arr;
}

destroyer([1, 2, 3, 1, 2, 3], 2, 3);

--solutions--

function destroyer(arr) {
  var hash = Object.create(null);
  [].slice.call(arguments, 1).forEach(function(e) {
    hash[e] = true;
  });
  return arr.filter(function(e) { return !(e in hash);});
}

destroyer([1, 2, 3, 1, 2, 3], 2, 3);