leetcode-problemset/leetcode/originData/check-if-object-instance-of-class.json

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            "title": "Check if Object Instance of Class",
            "titleSlug": "check-if-object-instance-of-class",
            "content": "<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>\n\n<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>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () =&gt; checkIfInstanceOf(new Date(), Date)\n<strong>Output:</strong> true\n<strong>Explanation: </strong>The object returned by the Date constructor is, by definition, an instance of Date.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () =&gt; { class Animal {}; class Dog extends Animal {}; return checkIfInstanceOf(new Dog(), Animal); }\n<strong>Output:</strong> true\n<strong>Explanation:</strong>\nclass Animal {};\nclass Dog extends Animal {};\ncheckIfInstanceOf(new Dog(), Animal); // true\n\nDog is a subclass of Animal. Therefore, a Dog object is an instance of both Dog and Animal.</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () =&gt; checkIfInstanceOf(Date, Date)\n<strong>Output:</strong> false\n<strong>Explanation: </strong>A date constructor cannot logically be an instance of itself.\n</pre>\n\n<p><strong class=\"example\">Example 4:</strong></p>\n\n<pre>\n<strong>Input:</strong> func = () =&gt; checkIfInstanceOf(5, Number)\n<strong>Output:</strong> true\n<strong>Explanation: </strong>5 is a Number. Note that the &quot;instanceof&quot; keyword would return false. However, it is still considered an instance of Number because it accesses the Number methods. For example &quot;toFixed()&quot;.\n</pre>\n",
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            "exampleTestcases": "() => checkIfInstanceOf(new Date(), Date)\n() => { class Animal {}; class Dog extends Animal {}; return checkIfInstanceOf(new Dog(), Animal); }\n() => checkIfInstanceOf(Date, Date)\n() => checkIfInstanceOf(5, Number)",
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                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * @param {*} obj\n * @param {*} classFunction\n * @return {boolean}\n */\nvar checkIfInstanceOf = function(obj, classFunction) {\n    \n};\n\n/**\n * checkIfInstanceOf(new Date(), Date); // true\n */",
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                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "function checkIfInstanceOf(obj: any, classFunction: any): boolean {\n\n};\n\n/**\n * checkIfInstanceOf(new Date(), Date); // true\n */",
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            "hints": [
                "In Javascript, inheritance is achieved with the prototype chain.",
                "You can get the prototype of an object with the Object.getPrototypeOf(obj) function. Alternatively, you can code obj['__proto__'].",
                "You can compare an object's __proto__ with classFunction.prototype.",
                "Traverse the entire prototype chain until you find a match."
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            "sampleTestCase": "() => checkIfInstanceOf(new Date(), Date)",
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