求一个正则！获取数字后进行处理，再替换原来的数字

Question

const datas =[

    "http://images/38f78c640...../images1_wh400&200.png",

    "http://images/38f78c640...../images2_wh400&200.png",

    "http://images/38f78c640...../images3_wh400&200.png",

] 

正则图片里的数字除以2，640/2,360/2，替换成 "http://images/38f78c640...../images1_wh200&100.png",地址里固定的就是图片名了，"images？_wh？&？.png"

Answer 1

datas.join(",").replace(/\d+/g,function(match){    return (+match)/2;}).split(",");