leetcode-problemset/leetcode/originData/counter.json

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            "title": "Counter",
            "titleSlug": "counter",
            "content": "<p>Given an integer&nbsp;<code>n</code>,&nbsp;return a <code>counter</code> function. This <code>counter</code> function initially returns&nbsp;<code>n</code>&nbsp;and then returns 1 more than the previous value every subsequent time it is called (<code>n</code>, <code>n + 1</code>, <code>n + 2</code>, etc).</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nn = 10 \n[&quot;call&quot;,&quot;call&quot;,&quot;call&quot;]\n<strong>Output:</strong> [10,11,12]\n<strong>Explanation: \n</strong>counter() = 10 // The first time counter() is called, it returns n.\ncounter() = 11 // Returns 1 more than the previous time.\ncounter() = 12 // Returns 1 more than the previous time.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> \nn = -2\n[&quot;call&quot;,&quot;call&quot;,&quot;call&quot;,&quot;call&quot;,&quot;call&quot;]\n<strong>Output:</strong> [-2,-1,0,1,2]\n<strong>Explanation:</strong> counter() initially returns -2. Then increases after each sebsequent call.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>-1000<sup>&nbsp;</sup>&lt;= n &lt;= 1000</code></li>\n\t<li><code>0 &lt;= calls.length &lt;= 1000</code></li>\n\t<li><code>calls[i] === &quot;call&quot;</code></li>\n</ul>\n",
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            "exampleTestcases": "10\n[\"call\",\"call\",\"call\"]\n-2\n[\"call\",\"call\",\"call\",\"call\",\"call\"]",
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                    "lang": "JavaScript",
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                    "code": "/**\n * @param {number} n\n * @return {Function} counter\n */\nvar createCounter = function(n) {\n    \n    return function() {\n        \n    };\n};\n\n/** \n * const counter = createCounter(10)\n * counter() // 10\n * counter() // 11\n * counter() // 12\n */",
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                    "lang": "TypeScript",
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                    "code": "function createCounter(n: number): () => number {\n    \n    return function() {\n\t\t\n    }\n}\n\n\n/** \n * const counter = createCounter(10)\n * counter() // 10\n * counter() // 11\n * counter() // 12\n */",
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            "hints": [
                "In JavaScript, a function can return a closure. A closure is defined as a function and the variables declared around it (it's lexical environment).",
                "A count variable can be initialized in the outer function and mutated in the inner function."
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            "sampleTestCase": "10\n[\"call\",\"call\",\"call\"]",
            "metaData": "{\n  \"name\": \"createCounter\",\n  \"params\": [\n    {\n      \"name\": \"n\",\n      \"type\": \"integer\"\n    },\n    {\n      \"type\": \"string[]\",\n      \"name\": \"calls\"\n    }\n  ],\n  \"return\": {\n    \"type\": \"integer\"\n  },\n  \"languages\": [\n    \"javascript\",\n    \"typescript\"\n  ],\n  \"manual\": true\n}",
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