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59 lines
13 KiB
JSON
59 lines
13 KiB
JSON
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"categoryTitle": "JavaScript",
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"boundTopicId": 2300583,
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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> \nactions = ["Calculator", "add", "subtract", "getResult"], \nvalues = [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> \nactions = ["Calculator", "multiply", "power", "getResult"], \nvalues = [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> \nactions = ["Calculator", "divide", "getResult"], \nvalues = [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>actions</code> is a valid JSON array of strings</li>\n\t<li><code>values</code> is a valid JSON array of numbers</li>\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> - 1</code></li>\n\t<li><code>actions[i]</code> is one of "Calculator", "add", "subtract", "multiply", "divide", "power", and "getResult"</li>\n\t<li>First action is always "Calculator"</li>\n\t<li>Last action is always "getResult"</li>\n</ul>\n",
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"translatedTitle": "使用方法链的计算器",
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"translatedContent": "<p>设计一个类 <code>Calculator</code> 。该类应提供加法、减法、乘法、除法和乘方等数学运算功能。同时，它还应支持连续操作的方法链式调用。<code>Calculator</code> 类的构造函数应接受一个数字作为 <code>result</code> 的初始值。</p>\n\n<p>你的 <code>Calculator</code> 类应包含以下方法：</p>\n\n<ul>\n\t<li><code>add</code> - 将给定的数字 <code>value</code> 与 <code>result</code> 相加，并返回更新后的 <code>Calculator</code> 对象。</li>\n\t<li><code>subtract</code> - 从 <code>result</code> 中减去给定的数字 <code>value</code> ，并返回更新后的 <code>Calculator</code> 对象。</li>\n\t<li><code>multiply</code> - 将 <code>result</code> 乘以给定的数字 <code>value</code> ，并返回更新后的 <code>Calculator</code> 对象。</li>\n\t<li><code>divide</code> - 将 <code>result</code> 除以给定的数字 <code>value</code> ，并返回更新后的 <code>Calculator</code> 对象。如果传入的值为 <code>0</code> ，则抛出错误 <code>\"Division by zero is not allowed\"</code> 。</li>\n\t<li><code>power</code> - 计算 <code>result</code> 的幂，指数为给定的数字 <code>value</code> ，并返回更新后的 <code>Calculator</code> 对象。（<code>result = result ^ value</code> ）</li>\n\t<li><code>getResult</code> - 返回 <code>result</code> 的值。</li>\n</ul>\n\n<p>结果与实际结果相差在 <code>10<sup>-5</sup></code><sup> </sup>范围内的解被认为是正确的。</p>\n\n<p> </p>\n\n<p><b>示例 1：</b></p>\n\n<pre>\n<b>输入：</b>actions = [\"Calculator\", \"add\", \"subtract\", \"getResult\"], \nvalues = [10, 5, 7]\n<b>输出：</b>8\n<b>解释：</b>\nnew Calculator(10).add(5).subtract(7).getResult() // 10 + 5 - 7 = 8\n</pre>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<pre>\n<b>输入：</b>actions = [\"Calculator\", \"multiply\", \"power\", \"getResult\"], \nvalues = [2, 5, 2]\n<b>输出：</b>100\n<b>解释：</b>\nnew Calculator(2).multiply(5).power(2).getResult() // (2 * 5) ^ 2 = 100\n</pre>\n\n<p><strong class=\"example\">示例 3：</strong></p>\n\n<pre>\n<b>输入：</b>actions = [\"Calculator\", \"divide\", \"getResult\"], \nvalues = [20, 0]\n<b>输出：</b>\"Division by zero is not allowed\"\n<b>解释：</b>\nnew Calculator(20).divide(0).getResult() // 20 / 0 \n\n由于不能除以零，因此应抛出错误。\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>actions</code> 是一个有效的 JSON 字符串数组</li>\n\t<li><code>values</code> 是一个有效的 JSON 字符串数组</li>\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> - 1</code></li>\n\t<li><code>actions[i]</code> 是 \"Calculator\", \"add\", \"subtract\", \"multiply\", \"divide\", \"power\", 和 \"getResult\" 其中的元素</li>\n\t<li>第一个操作总是 \"Calculator\"</li>\n\t<li>最后一个操作总是 \"getResult\"</li>\n</ul>\n",
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