連想配列の重複チェック 【Lodash, find】 - Qiita

const targetA = [ {name: "taro"}, {name: "ichiro"}, {name: "tetsuto"}, {name: "lisa"} ]; const targetB = [ {name: "yuki"}, {name: "ichiro"}, {name: "takeya"}, {name: "lisa"} ]; // 重複してるユーザーを取得 const duplicatedList = targetA.filter(user => { return _.find(targetB, user); }); // 重複していないユーザーを取得 const originalList = targetA.filter(user => { return !_.find(targetB, user); });