Oliver Eyton-Williams ee1e8abd87

feat(curriculum): restore seed + solution to Chinese (#40683 )

* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>

2021-01-12 19:31:00 -07:00

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id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
a10d2431ad0c6a099a4b8b52	检查对象属性	5	16011	everything-be-true

--description--

对于第一个参数（对象数组）中的每个元素，检查第二个参数（字符串）所对应的属性值是否都为 truthy。

换句话说，函数的第一个参数是一个对象数组，第二个参数是一个字符串 pre，表示对象的属性。如果数组中的每个对象里，pre 对应属性值均为 truthy，则返回 true；否则返回 false。

JavaScript 中，如果一个值在 Boolean 的上下文中（比如 if 语句）的执行结果为 true，那么我们称这个值是 truthy 的。

别忘了，你可以使用点号表示法（.）或方括号表示法（[]）来访问对象的属性。

--hints--

truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex") 应返回 true。

assert.strictEqual(
  truthCheck(
    [
      { user: 'Tinky-Winky', sex: 'male' },
      { user: 'Dipsy', sex: 'male' },
      { user: 'Laa-Laa', sex: 'female' },
      { user: 'Po', sex: 'female' }
    ],
    'sex'
  ),
  true
);

truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex") 应返回 false。

assert.strictEqual(
  truthCheck(
    [
      { user: 'Tinky-Winky', sex: 'male' },
      { user: 'Dipsy' },
      { user: 'Laa-Laa', sex: 'female' },
      { user: 'Po', sex: 'female' }
    ],
    'sex'
  ),
  false
);

truthCheck([{"user": "Tinky-Winky", "sex": "male", "age": 0}, {"user": "Dipsy", "sex": "male", "age": 3}, {"user": "Laa-Laa", "sex": "female", "age": 5}, {"user": "Po", "sex": "female", "age": 4}], "age") 应返回 false。

assert.strictEqual(
  truthCheck(
    [
      { user: 'Tinky-Winky', sex: 'male', age: 2 },
      { user: 'Dipsy', sex: 'male', age: 0 },
      { user: 'Laa-Laa', sex: 'female', age: 5 },
      { user: 'Po', sex: 'female', age: 4 }
    ],
    'age'
  ),
  false
);

truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true}, {"name": "FastForward", "onBoat": null}], "onBoat") 应返回 false。

assert.strictEqual(
  truthCheck(
    [
      { name: 'Pete', onBoat: true },
      { name: 'Repeat', onBoat: true },
      { name: 'FastForward', onBoat: null }
    ],
    'onBoat'
  ),
  false
);

truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true, "alias": "Repete"}, {"name": "FastForward", "onBoat": true}], "onBoat") 应返回 true。

assert.strictEqual(
  truthCheck(
    [
      { name: 'Pete', onBoat: true },
      { name: 'Repeat', onBoat: true, alias: 'Repete' },
      { name: 'FastForward', onBoat: true }
    ],
    'onBoat'
  ),
  true
);

truthCheck([{"single": "yes"}], "single") 应返回 true。

assert.strictEqual(truthCheck([{ single: 'yes' }], 'single'), true);

truthCheck([{"single": ""}, {"single": "double"}], "single") 应返回 false。

assert.strictEqual(
  truthCheck([{ single: '' }, { single: 'double' }], 'single'),
  false
);

truthCheck([{"single": "double"}, {"single": undefined}], "single") 应返回 false。

assert.strictEqual(
  truthCheck([{ single: 'double' }, { single: undefined }], 'single'),
  false
);

truthCheck([{"single": "double"}, {"single": NaN}], "single") 应返回 false。

assert.strictEqual(
  truthCheck([{ single: 'double' }, { single: NaN }], 'single'),
  false
);

--seed--

--seed-contents--

function truthCheck(collection, pre) {
  return pre;
}

truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex");

--solutions--

function truthCheck(collection, pre) {
  return collection.every(function(e) { return e[pre]; });
}

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