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g2701_2800.s2726_calculator_with_method_chaining.readme.md Maven / Gradle / Ivy

2726\. Calculator with Method Chaining

Easy

Design a `Calculator` 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 `Calculator` class constructor should accept a number which serves as the initial value of `result`.

Your `Calculator` class should have the following methods:

*   `add` - This method adds the given number `value` to the `result` and returns the updated `Calculator`.
*   `subtract` - This method subtracts the given number `value` from the `result` and returns the updated `Calculator`.
*   `multiply` - This method multiplies the `result` by the given number `value` and returns the updated `Calculator`.
*   `divide` - This method divides the `result` by the given number `value` and returns the updated `Calculator`. If the passed value is `0`, an error `"Division by zero is not allowed"` should be thrown.
*   `power` - This method raises the `result` to the power of the given number `value` and returns the updated `Calculator`.
*   `getResult` - This method returns the `result`.

Solutions within 10-5 of the actual result are considered correct.

**Example 1:**

**Input:** actions = ["Calculator", "add", "subtract", "getResult"], values = [10, 5, 7]

**Output:** 8

**Explanation:** new Calculator(10).add(5).subtract(7).getResult() // 10 + 5 - 7 = 8

**Example 2:**

**Input:** actions = ["Calculator", "multiply", "power", "getResult"], values = [2, 5, 2]

**Output:** 100

**Explanation:** new Calculator(2).multiply(5).power(2).getResult() // (2 \* 5) ^ 2 = 100

**Example 3:**

**Input:** actions = ["Calculator", "divide", "getResult"], values = [20, 0]

**Output:** "Division by zero is not allowed"

**Explanation:** new Calculator(20).divide(0).getResult() // 20 / 0 The error should be thrown because we cannot divide by zero.

**Constraints:**

*   2 <= actions.length <= 2 * 104
*   1 <= values.length <= 2 * 104 - 1
*   `actions[i] is one of "Calculator", "add", "subtract", "multiply", "divide", "power", and "getResult"`
*   `Last action is always "getResult"`
*   `values is a JSON array of numbers`