js 实现去重
ES6 set去重
Array.from(new Set([1,2,3,3,4,4])) // [1,2,3,4] [...new Set([1,2,3,3,4,4])] // [1,2,3,4]
使用 for of 去重(On)
Array.prototype.distinct = function() { const map = {} const result = [] for (const n of this) { if (!(n in map)) { map[n] = 1 result.push(n) } } return result } [1,2,3,3,4,4].distinct(); //[1,2,3,4]