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js 數(shù)組對(duì)象去掉相同的

JavaScript

瀟湘沐 2019-10-16 17:07:19

原始數(shù)據(jù)：(20)[{…},{…},{…},{…},{…},{…},__ob__:Observer]0:dataContent:(...)topic:"年齡"1:dataContent:(...)topic:"性別"2:dataContent:(...)topic:"性別"3:{__ob__:Observer}4:{__ob__:Observer}刪除數(shù)組對(duì)象topic字段相同的，圖中有兩個(gè)topic：性別，只想留住后面的，要?jiǎng)h除前面那個(gè)topic：性別的，把下標(biāo)為1的刪除留下標(biāo)為2的期望得到:(20)[{…},{…},{…},{…},{…},{…},__ob__:Observer]0:dataContent:(...)topic:"年齡"2:dataContent:(...)topic:"性別"3:{__ob__:Observer}4:{__ob__:Observer}更新：topic字段值不固定

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2 回答

手掌心

TA貢獻(xiàn)1942條經(jīng)驗(yàn) 獲得超3個(gè)贊

//傳key值和value值數(shù)組function(keys,value){keys.forEach((k,i)=>{letindex=arr.findIndex(item=>item[k]==value[i])arr.splice(index,1)})}

反對(duì) 回復(fù) 2019-10-16

大話西游666

TA貢獻(xiàn)1817條經(jīng)驗(yàn) 獲得超14個(gè)贊

functiondemo(list){letkeys=[],item;for(leta=list.length-1;a>=0;a--){item=list[a]if(keys.some(t=>t===item.topic)){list.splice(a,1)}else{keys.push(item.topic)}}returnlist}vararr=[{name:'張三',topic:'班主任'},{name:'李四',topic:'體育老師'},{name:'王五',topic:'班主任'},{name:'趙六',topic:'體育老師'}]varres=demo(arr)console.log(JSON.stringify(res))//=>[{"name":"王五","topic":"班主任"},{"name":"趙六","topic":"體育老師"}]