如何对求出给定数组中的平均成绩

Question

ar scoreStr = "小2明:87;小花:81;小红:97;小1:76;小99:74;小2:94;小西:90;小伍:76;小迪:64;小曼:76";

var tostring = Object.prototype.toStrin

Answer 1

var scoreStr = "小2明:87;小花:81;小红:97;小1:76;小99:74;小2:94;小西:90;小伍:76;小迪:64;小曼:76";var list = scoreStr.split(';');var arr = []list.forEach(item => {    arr.push(parseInt(item.split(':')[1], 10))})var sum = arr.reduce((total, num) => total + num)var av = sum / arr.lengthconsole.log(av) // 平均成绩