/**
* ROLE: EXECUTABLE
* CONNECTED VIA: ES6 modules
* PURPOSE: JavaScript calculator implementation
* FAILURE MODES: Division by zero throws error, invalid factorial input throws error
*
* Authority: multilang-test.md
*/
// JavaScript Calculator - ES6 Class
class Calculator {
constructor(precision = 10) {
this.history = [];
this.precision = precision;
}
add(a, b) {
const result = a + b;
this.history.push({ op: 'add', a, b, result, ts: new Date() });
return parseFloat(result.toFixed(this.precision));
}
subtract(a, b) {
const result = a - b;
this.history.push({ op: 'subtract', a, b, result, ts: new Date() });
return parseFloat(result.toFixed(this.precision));
}
multiply(a, b) {
const result = a * b;
this.history.push({ op: 'multiply', a, b, result, ts: new Date() });
return parseFloat(result.toFixed(this.precision));
}
divide(a, b) {
if (b === 0) throw new Error('Division by zero');
const result = a / b;
this.history.push({ op: 'divide', a, b, result, ts: new Date() });
return parseFloat(result.toFixed(this.precision));
}
power(base, exp) {
const result = Math.pow(base, exp);
this.history.push({ op: 'power', a: base, b: exp, result, ts: new Date() });
return parseFloat(result.toFixed(this.precision));
}
factorial(n) {
if (n < 0) throw new Error('Factorial undefined for negative');
let result = 1;
for (let i = 2; i <= n; i++) result *= i;
this.history.push({ op: 'factorial', a: n, result, ts: new Date() });
return result;
}
getHistory() {
return this.history;
}
}
module.exports = Calculator;
