题解 | #数组去重#
数组去重
http://www.nowcoder.com/practice/0b5ae9c4a8c546f79e2547c0179bfdc2
// set方法
Array.prototype.uniq = function () {
return [...new Set(this)]
}// map
Array.prototype.uniq = function () {
const sMap = new Map()
this.forEach((itm,idx) => {
if(!sMap.has(itm)){
sMap.set(itm,'1')
}
})
return Array.from(sMap.keys())
}