版本对比 两个版本号 一样长度

// 版本号 对比

const edition = (curV, reqV)=>{

// 当前版本号：curV；比较版本号：reqV

if (curV && reqV) {

//将两个版本号拆成数字

var arr1 = curV.split('.'),

arr2 = reqV.split('.');

var minLength = Math.min(arr1.length, arr2.length),

position = 0,

diff = 0;

//依次比较版本号每一位大小，当对比得出结果后跳出循环（后文有简单介绍）

while (position < minLength && ((diff = parseInt(arr1[position]) - parseInt(arr2[position])) == 0)) {

position++;

}

diff = (diff != 0) ? diff : (arr1.length - arr2.length);

//若curV大于reqV，则返回true

return diff > 0;

} else {

//输入为空

console.log("版本号不能为空");

return false;

}

}