过滤数据中重复的项
平时的js数值处理中,我们经常需要删除重复的项,此处针对该操作记录一下
- 删除重复的值
function deleteDuplicateData(arr){
return arr.filter((item,index,self) => {
return index === self.indexOf(item)
})
}
deleteDuplicateData([1,2,2,3])
- 删除对象数组中重复的项
let data = [
{id:1,filename: 'a'},
{id:2,filename: 'b'},
{id:3,filename: 'a'},
]
function deleteDuplicateData() {
return data.filter((item, index, self) =>
index === self.findIndex((it) => (
it.filename === item.filename
)),
)
}
deleteDuplicateData(data)