复杂结构的数组去重怎么操作

Question

[[{"title":"11111111111","field":"","colspan":2,"rowspan":"1"},{"title":"11111111111","field":"","colspan":2,"rowspan":"1"},{"title":"22222222","field":"","colspan":"4","rowspan":"1"},{"title":"22222222","field":"","colspan":"4","rowspan":"1"},{"title":"22222222","field":"","colspan":"4","rowspan":"1"},{"title":"22222222","field":"","colspan":"4","rowspan":"1"}],[{"title":"3333333333","field":"","colspan":"2","rowspan":"1"},{"title":"3333333333","field":"","colspan":"2","rowspan":"1"},{"title":"4444444444","field":"","colspan":"3","rowspan":"1"},{"title":"4444444444","field":"","colspan":"3","rowspan":"1"},{"title":"4444444444","field":"","colspan":"3","rowspan":"1"},{"title":"单位数量2","field":"单位数量2","colspan":"1","rowspan":"3"}],[{"title":"中止1","field":"中止","colspan":"1","rowspan":"2"},{"title":"单位数量3","field":"单位数量3","colspan":"1","rowspan":"2"},{"title":"单位数量4","field":"单位数量4","colspan":"1","rowspan":"2"},{"title":"555555555","field":"","colspan":"2","rowspan":"1"},{"title":"555555555","field":"","colspan":"2","rowspan":"1"},{"title":"单位数量2","field":"单位数量2","colspan":"1","rowspan":"3"}],[{"title":"中止1","field":"中止","colspan":"1","rowspan":"2"},{"title":"单位数量3","field":"单位数量3","colspan":"1","rowspan":"2"},{"title":"单位数量4","field":"单位数量4","colspan":"1","rowspan":"2"},{"title":"单位数量5","field":"单位数量5","colspan":"1","rowspan":"1"},{"title":"单位数量6","field":"单位数量6","colspan":"1","rowspan":"1"},{"title":"单位数量2","field":"单位数量2","colspan":"1","rowspan":"3"}]]只保留第一次出现的后几次出现的删除结果要变成这样[[{"title":"11111111111","field":"","colspan":"3","rowspan":"1"},{"title":"22222222","field":"","colspan":"4","rowspan":"1"}],[{"title":"单位数量1","field":"单位数量1","colspan":"1","rowspan":"3"},{"title":"3333333333","field":"","colspan":"2","rowspan":"1"},{"title":"4444444444","field":"","colspan":"3","rowspan":"1"},{"title":"单位数量2","field":"单位数量2","colspan":"1","rowspan":"3"}],[{"title":"中止1","field":"中止","colspan":"1","rowspan":"2"},{"title":"单位数量3","field":"单位数量3","colspan":"1","rowspan":"2"},{"title":"单位数量4","field":"单位数量4","colspan":"1","rowspan":"2"},{"title":"555555555","field":"","colspan":"2","rowspan":"1"}],[{"title":"单位数量5","field":"单位数量5","colspan":"1","rowspan":"1"},{"title":"单位数量6","field":"单位数量6","colspan":"1","rowspan":"1"}]]

Answer 1

arr.map(items=>{
varresult=[]
items.forEach(item=>{
if(!result.find(_item=>JSON.stringify(item)===JSON.stringify(_item))){
result.push(item)
}
})
returnresult
})