MrZhang

摘要： const difference= (a, b) => { const sA = new Set(a), sB = new Set(b); return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))]; } // difference([1,2,3], [1,2,4]) -> [3,4] let arr1 = [　... 阅读全文