Raymone Lin

function toTree(data) { var result = []; var map = {}; data.forEach((item) => { map[item.id] = item; }); data.forEach((item) => { var parent = map[item.parentId]; if (parent) { (parent.children ||...

默写一遍 function Promise(constructor){ let self = this; self.status = "pending"; self.value = undefined; self.reason = underfined; function resolved(value){ if(self.state === "pending"){ self.status = "resolved"; self.value = value; } } function...