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            "title": "Compact Object",
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            "content": "<p>Given an object or array&nbsp;<code>obj</code>, return a <strong>compact object</strong>. A <strong>compact object</strong>&nbsp;is the same as the original object, except with keys containing <strong>falsy</strong> values removed. This operation applies to the object and any nested objects. Arrays are considered objects where&nbsp;the indices are&nbsp;keys. A value is&nbsp;considered <strong>falsy</strong>&nbsp;when <code>Boolean(value)</code> returns <code>false</code>.</p>\n\n<p>You may assume the&nbsp;<code>obj</code> is&nbsp;the output of&nbsp;<code>JSON.parse</code>. In other words, it is valid JSON.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> obj = [null, 0, false, 1]\n<strong>Output:</strong> [1]\n<strong>Explanation:</strong> All falsy values have been removed from the array.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> obj = {&quot;a&quot;: null, &quot;b&quot;: [false, 1]}\n<strong>Output:</strong> {&quot;b&quot;: [1]}\n<strong>Explanation:</strong> obj[&quot;a&quot;] and obj[&quot;b&quot;][0] had falsy values and were removed.</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> obj = [null, 0, 5, [0], [false, 16]]\n<strong>Output:</strong> [5, [], [16]]\n<strong>Explanation:</strong> obj[0], obj[1], obj[3][0], and obj[4][0] were falsy and removed.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>obj</code> is a valid JSON object</li>\n\t<li><code>2 &lt;= JSON.stringify(obj).length &lt;= 10<sup>6</sup></code></li>\n</ul>\n",
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                    "code": "type JSONValue = null | boolean | number | string | JSONValue[] | { [key: string]: JSONValue };\ntype Obj = Record<string, JSONValue> | Array<JSONValue>;\n\nfunction compactObject(obj: Obj): Obj {\n\t\n};",
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