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56 lines
8.1 KiB
JSON
56 lines
8.1 KiB
JSON
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"questionFrontendId": "2726",
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"boundTopicId": null,
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"title": "Calculator with Method Chaining",
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"titleSlug": "calculator-with-method-chaining",
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"content": "<p>Design a <code>Calculator</code> class. The class should provide the mathematical operations of addition, subtraction, multiplication, division, and exponentiation. It should also allow consecutive operations to be performed using method chaining. The <code>Calculator</code> class constructor should accept a number which serves as the initial value of <code>result</code>.</p>\n\n<p>Your <font face=\"monospace\"><code>Calculator</code> </font>class should have the following methods:</p>\n\n<ul>\n\t<li><code>add</code> - This method adds the given number <code>value</code> to the <code>result</code> and returns the updated <code>Calculator</code>.</li>\n\t<li><code>subtract</code> - This method subtracts the given number <code>value</code> from the <code>result</code> and returns the updated <code>Calculator</code>.</li>\n\t<li><code>multiply</code> - This method multiplies the <code>result</code> by the given number <code>value</code> and returns the updated <code>Calculator</code>.</li>\n\t<li><code>divide</code> - This method divides the <code>result</code> by the given number <code>value</code> and returns the updated <code>Calculator</code>. If the passed value is <code>0</code>, an error <code>"Division by zero is not allowed"</code> should be thrown.</li>\n\t<li><code>power</code> - This method raises the <code>result</code> to the power of the given number <code>value</code> and returns the updated <code>Calculator</code>.</li>\n\t<li><code>getResult</code> - This method returns the <code>result</code>.</li>\n</ul>\n\n<p>Solutions within <code>10<sup>-5</sup></code> of the actual result are considered correct.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> actions = ["Calculator", "add", "subtract", "getResult"], values = [10, 5, 7]\n<strong>Output:</strong> 8\n<strong>Explanation:</strong> \nnew Calculator(10).add(5).subtract(7).getResult() // 10 + 5 - 7 = 8\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> actions = ["Calculator", "multiply", "power", "getResult"], values = [2, 5, 2]\n<strong>Output:</strong> 100\n<strong>Explanation:</strong> \nnew Calculator(2).multiply(5).power(2).getResult() // (2 * 5) ^ 2 = 100\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> actions = ["Calculator", "divide", "getResult"], values = [20, 0]\n<strong>Output:</strong> "Division by zero is not allowed"\n<strong>Explanation:</strong> \nnew Calculator(20).divide(0).getResult() // 20 / 0 \n\nThe error should be thrown because we cannot divide by zero.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 <= actions.length <= 2 * 10<sup>4</sup></code></li>\n\t<li><code>1 <= values.length <= 2 * 10<sup>4</sup></code><code> - 1</code></li>\n\t<li><code>actions[i] is one of "Calculator", "add", "subtract", "multiply", "divide", "power", and "getResult"</code></li>\n\t<li><code><font face=\"monospace\">Last action is always "getResult"</font></code></li>\n\t<li><code><font face=\"monospace\">values is a JSON array of numbers</font></code></li>\n</ul>\n",
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"difficulty": "Easy",
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"exampleTestcases": "[\"Calculator\", \"add\", \"subtract\", \"getResult\"]\n[10, 5, 7]\n[\"Calculator\", \"multiply\", \"power\", \"getResult\"]\n[2, 5, 2]\n[\"Calculator\", \"divide\", \"getResult\"]\n[20, 0]",
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"categoryTitle": "JavaScript",
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{
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"lang": "JavaScript",
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"langSlug": "javascript",
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"code": "class Calculator {\n \n /** \n * @param {number} value\n */\n constructor(value) {\n\n }\n\n /** \n * @param {number} value\n * @return {Calculator}\n */\n add(value){\n\n }\n\n /** \n * @param {number} value\n * @return {Calculator}\n */\n subtract(value){\n\n }\n\n /** \n * @param {number} value\n * @return {Calculator}\n */ \n multiply(value) {\n\n }\n\n /** \n * @param {number} value\n * @return {Calculator}\n */\n divide(value) {\n\n }\n \n /** \n * @param {number} value\n * @return {Calculator}\n */\n power(value) {\n\n }\n \n /** \n * @return {number}\n */\n getResult() {\n \n }\n}",
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},
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{
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"lang": "TypeScript",
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"langSlug": "typescript",
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"code": "class Calculator {\n \n constructor(value : number) {\n\n }\n \n add(value : number) : Calculator {\n\n }\n \n subtract(value : number) : Calculator {\n\n }\n \n multiply(value : number) : Calculator {\n\n }\n\n divide(value : number) : Calculator {\n\n }\n \n power(value : number) : Calculator {\n\n }\n\n getResult() : number {\n \n }\n}",
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"sampleTestCase": "[\"Calculator\", \"add\", \"subtract\", \"getResult\"]\n[10, 5, 7]",
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