js数字累加

// 简单累加示例
function simpleSum(numbers) {
    let sum = 0;
    for (let i = 0; i < numbers.length; i++) {
        sum += numbers[i];
    }
    return sum;
}

const numbers = [1, 2, 3, 4, 5];
console.log(simpleSum(numbers)); // 输出: 15

// 条件累加示例
function conditionalSum(numbers, condition) {
    let sum = 0;
    for (let i = 0; i < numbers.length; i++) {
        if (condition(numbers[i])) {
            sum += numbers[i];
        }
    }
    return sum;
}

const isEven = (num) => num % 2 === 0;
console.log(conditionalSum(numbers, isEven)); // 输出: 6 (2 + 4)

// 使用BigInt处理大整数
const bigNumber = BigInt("9007199254740991");
console.log(bigNumber + BigInt(1)); // 输出: 9007199254740992n

// 使用decimal.js处理高精度浮点数
const Decimal = require('decimal.js');
const a = new Decimal(0.1);
const b = new Decimal(0.2);
console.log(a.plus(b).toString()); // 输出: "0.3"

// 异步累加示例
async function asyncSum(asyncNumbers) {
    const results = await Promise.all(asyncNumbers.map(async (num) => num()));
    return results.reduce((acc, val) => acc + val, 0);
}

const asyncNumbers = [
    () => Promise.resolve(1),
    () => Promise.resolve(2),
    () => Promise.resolve(3)
];

asyncSum(asyncNumbers).then(sum => console.log(sum)); // 输出: 6