freeCodeCamp/reset-an-inherited-constructor-property.chinese.md at 39df9d94c912b7b4ea424ff9cc6e55ea3f576f44

Kristofer Koishigawa b3213fc892 fix(i18n): chinese test suite (#38220 )

* fix: Chinese test suite

Add localeTiltes, descriptions, and adjust test text and testStrings to get the automated test suite working.

* fix: ran script, updated testStrings and solutions

2020-03-03 18:49:47 +05:30

2.1 KiB

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id, title, challengeType, videoUrl, localeTitle

id	title	challengeType	videoUrl	localeTitle
587d7db1367417b2b2512b86	Reset an Inherited Constructor Property	1		重置继承的构造函数属性

Description

当一个对象从另一个对象继承它的prototype ，它也继承了supertype的构造函数属性。这是一个例子：

函数Bird（）{}
Bird.prototype = Object.create（Animal.prototype）;
let duck = new Bird（）;
duck.constructor // function Animal（）{...}

但duck和所有Bird实例都应该表明它们是由Bird而不是Animal建造的。为此，您可以手动将Bird's构造函数属性设置为Bird对象：

Bird.prototype.constructor = Bird;
duck.constructor // function Bird（）{...}

Instructions

修复代码，使duck.constructor和beagle.constructor返回各自的构造函数。

Tests

tests:
  - text: <code>Bird.prototype</code>应该是<code>Animal</code>一个实例。
    testString: assert(Animal.prototype.isPrototypeOf(Bird.prototype));
  - text: <code>duck.constructor</code>应该返回<code>Bird</code> 。
    testString: assert(duck.constructor === Bird);
  - text: <code>Dog.prototype</code>应该是<code>Animal</code>一个实例。
    testString: assert(Animal.prototype.isPrototypeOf(Dog.prototype));
  - text: <code>beagle.constructor</code>应该返回<code>Dog</code> 。
    testString: assert(beagle.constructor === Dog);

Challenge Seed

function Animal() { }
function Bird() { }
function Dog() { }

Bird.prototype = Object.create(Animal.prototype);
Dog.prototype = Object.create(Animal.prototype);

// Add your code below this line



let duck = new Bird();
let beagle = new Dog();

Solution

// solution required

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