find の存在を忘れるのでメモ
const family = [ {id: 1, name: 'Loid'}, {id: 2, name: 'Anya'}, {id: 3, name: 'Yor'}, ] const person = family.find(f => f.id === 2); console.info(person.name); //-> Anya
牌語備忘録 -pygo
find の存在を忘れるのでメモ
const family = [ {id: 1, name: 'Loid'}, {id: 2, name: 'Anya'}, {id: 3, name: 'Yor'}, ] const person = family.find(f => f.id === 2); console.info(person.name); //-> Anya
const getDupeList = (arr) => { return Array.from(new Set(arr.filter((v, i, array) => { return !(array.indexOf(v) === i); }))); } console.log(getDupeList([1, 2, 3, 1, 2, 4, 5, 1])); //-> [ 1, 2 ]