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leetcode-cn/problem (English)/检查是否是类的对象实例(English) [check-if-object-instance-of-class].html
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<p>Write a function that checks if a given object is an instance of a given class or superclass. For this problem, an object is considered an instance of a given class if that object has access to that class&#39;s methods.</p>
<p>Write a function that checks if a given value&nbsp;is an instance of a given class or superclass. For this problem, an object is considered an instance of a given class if that object has access to that class&#39;s methods.</p>
<p>There are&nbsp;no constraints on the data types that can be passed to the function.</p>
<p>There are&nbsp;no constraints on the data types that can be passed to the function. For example, the value or the class could be&nbsp;<code>undefined</code>.</p>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
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<strong>Explanation:</strong>
class Animal {};
class Dog extends Animal {};
checkIfInstance(new Dog(), Animal); // true
checkIfInstanceOf(new Dog(), Animal); // true
Dog is a subclass of Animal. Therefore, a Dog object is an instance of both Dog and Animal.</pre>