javascript - 做Codewars JavaScript初学者挑战(Doing codewars JavaScript beginner challenge)

Question

I just joined this highly recommended website.

(我刚刚加入了这个强烈推荐的网站。)

Hope someone can help me understand code a bit better.

(希望有人可以帮助我更好地理解代码。)

I am now doing the codewars challenge to make Credit Card Mask .

(我现在正在做代码战挑战来制作信用卡面膜。)

So i need to mask all the numbers with # and leave the last 4 visable.

(所以我需要用＃掩盖所有数字，并保留最后4个可见的数字。)

Here is my code :

(这是我的代码：)

function maskify(cc) {
let mask= '' ;
let all = mask.slice()
all = all.slice(-4)
for (i = 0 ; i < mask.length ; i++){
 i += '#'
}
return mask[i] + all ;
}
maskify(2,3,2,1,3,2,1,321321)

can someone explain to me what I am doing wrong.

(有人可以向我解释我在做什么错。)

My JS knowlage is still basic.

(我的JS知识仍然很基础。)

  ask by marian nestorov translate from so

Answer 1

等待大神答复