更新时间:2021-10-05 09:29:48
带有reduce https://jsfiddle的变量.net/58z7nrfy/1/
var a = [1,2,3,1,2,3,2,2,3,4,5,5,12,1,23,4,1];
var b = a.reduce(function(p,c,i,a){
if (p.indexOf(c) == -1) p.push(c);
else p.push('')
return p;
}, [])
console.log(b)
[1、2、3,,",,",,",,",4、5,,12,",23,,",] >