如何对正数和负数求和

Question

谁能帮助我如何在javascript中汇总/收集正数和负数？ 我使用什么方法

Answer 1

一些有用的方法可以是filter和reduce假设您指的是要汇总的数字数组 [原文如此] （我假设您的意思是总和）：

 const nums = [5, 3, -2, 0, 9, -8, 7] const positiveNumsTotal = nums.filter(num => num > 0).reduce((a, b) => a + b, 0) const negativeNumsTotal = nums.filter(num => num < 0).reduce((a, b) => a + b, 0) const overallTotal = nums.reduce((a, b) => a + b, 0) console.log(`nums array: ${JSON.stringify(nums)}`) console.log(`Postive number total: ${positiveNumsTotal}`) console.log(`Negative numbers total: ${negativeNumsTotal}`) console.log(`Overall total: ${overallTotal}`)