freeCodeCamp/curriculum/challenges/russian/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/everything-be-true.russian.md

id	title	isRequired	challengeType	videoUrl	localeTitle
a10d2431ad0c6a099a4b8b52	Everything Be True	true	5		Все верно

Description

Проверьте, является ли предикат (второй аргумент) правдивым для всех элементов коллекции (первый аргумент). Другими словами, вам предоставляется массив объектов. Предикат pre будет свойством объекта, и вам нужно вернуть true если его значение является truthy . В противном случае верните false . В JavaScript truthy значениями являются значения, которые переводятся в true при оценке в булевом контексте. Помните, что вы можете получить доступ к свойствам объекта с помощью либо точечной нотации, либо обозначения [] . Не забудьте использовать Read-Search-Ask, если вы застряли. Попробуйте подключить программу. Напишите свой собственный код.

Instructions

Tests

tests:
  - text: '<code>truthCheck([{&quot;user&quot;: &quot;Tinky-Winky&quot;, &quot;sex&quot;: &quot;male&quot;}, {&quot;user&quot;: &quot;Dipsy&quot;, &quot;sex&quot;: &quot;male&quot;}, {&quot;user&quot;: &quot;Laa-Laa&quot;, &quot;sex&quot;: &quot;female&quot;}, {&quot;user&quot;: &quot;Po&quot;, &quot;sex&quot;: &quot;female&quot;}], &quot;sex&quot;)</code> должны верны.'
    testString: 'assert.strictEqual(truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex"), true, "<code>truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex")</code> should return true.");'
  - text: '<code>truthCheck([{&quot;user&quot;: &quot;Tinky-Winky&quot;, &quot;sex&quot;: &quot;male&quot;}, {&quot;user&quot;: &quot;Dipsy&quot;}, {&quot;user&quot;: &quot;Laa-Laa&quot;, &quot;sex&quot;: &quot;female&quot;}, {&quot;user&quot;: &quot;Po&quot;, &quot;sex&quot;: &quot;female&quot;}], &quot;sex&quot;)</code> должен возвращать false.'
    testString: 'assert.strictEqual(truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex"), false, "<code>truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex")</code> should return false.");'
  - text: '<code>truthCheck([{&quot;user&quot;: &quot;Tinky-Winky&quot;, &quot;sex&quot;: &quot;male&quot;, &quot;age&quot;: 0}, {&quot;user&quot;: &quot;Dipsy&quot;, &quot;sex&quot;: &quot;male&quot;, &quot;age&quot;: 3}, {&quot;user&quot;: &quot;Laa-Laa&quot;, &quot;sex&quot;: &quot;female&quot;, &quot;age&quot;: 5}, {&quot;user&quot;: &quot;Po&quot;, &quot;sex&quot;: &quot;female&quot;, &quot;age&quot;: 4}], &quot;age&quot;)</code> должен возвращать значение false.'
    testString: '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, "<code>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")</code> should return false.");'
  - text: '<code>truthCheck([{&quot;name&quot;: &quot;Pete&quot;, &quot;onBoat&quot;: true}, {&quot;name&quot;: &quot;Repeat&quot;, &quot;onBoat&quot;: true}, {&quot;name&quot;: &quot;FastFoward&quot;, &quot;onBoat&quot;: null}], &quot;onBoat&quot;)</code> должен возвращать false'
    testString: 'assert.strictEqual(truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true}, {"name": "FastFoward", "onBoat": null}], "onBoat"), false, "<code>truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true}, {"name": "FastFoward", "onBoat": null}], "onBoat")</code> should return false");'
  - text: '<code>truthCheck([{&quot;name&quot;: &quot;Pete&quot;, &quot;onBoat&quot;: true}, {&quot;name&quot;: &quot;Repeat&quot;, &quot;onBoat&quot;: true, &quot;alias&quot;: &quot;Repete&quot;}, {&quot;name&quot;: &quot;FastFoward&quot;, &quot;onBoat&quot;: true}], &quot;onBoat&quot;)</code> должен возвращать true'
    testString: 'assert.strictEqual(truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true, "alias": "Repete"}, {"name": "FastFoward", "onBoat": true}], "onBoat"), true, "<code>truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true, "alias": "Repete"}, {"name": "FastFoward", "onBoat": true}], "onBoat")</code> should return true");'
  - text: '<code>truthCheck([{&quot;single&quot;: &quot;yes&quot;}], &quot;single&quot;)</code> должен возвращать true'
    testString: 'assert.strictEqual(truthCheck([{"single": "yes"}], "single"), true, "<code>truthCheck([{"single": "yes"}], "single")</code> should return true");'
  - text: '<code>truthCheck([{&quot;single&quot;: &quot;&quot;}, {&quot;single&quot;: &quot;double&quot;}], &quot;single&quot;)</code> должен возвращать false'
    testString: 'assert.strictEqual(truthCheck([{"single": ""}, {"single": "double"}], "single"), false, "<code>truthCheck([{"single": ""}, {"single": "double"}], "single")</code> should return false");'
  - text: '<code>truthCheck([{&quot;single&quot;: &quot;double&quot;}, {&quot;single&quot;: undefined}], &quot;single&quot;)</code> должен возвращать false'
    testString: 'assert.strictEqual(truthCheck([{"single": "double"}, {"single": undefined}], "single"), false, "<code>truthCheck([{"single": "double"}, {"single": undefined}], "single")</code> should return false");'
  - text: '<code>truthCheck([{&quot;single&quot;: &quot;double&quot;}, {&quot;single&quot;: NaN}], &quot;single&quot;)</code> должен возвращать false'
    testString: 'assert.strictEqual(truthCheck([{"single": "double"}, {"single": NaN}], "single"), false, "<code>truthCheck([{"single": "double"}, {"single": NaN}], "single")</code> should return false");'

Challenge Seed

function truthCheck(collection, pre) {
  // Is everyone being true?
  return pre;
}

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

Solution

// solution required