javascript - 更好的做法:消除嵌套循环？

我正在遍历像这样的一些对象（使用Underscore.js）：

      _.each(obj.Things, function(thing) {
        _.each(thing.SubThings, function(subThing) {
          _.each(subThing.SubSubThing, function(subSubThing) {
            things.push(subSubThing);
          });
        });
      });

从架构上来说，我不喜欢它的外观。有没有一种更清洁的方式来完成这样的任务？

最佳答案

提高代码可读性的一种方法是取消嵌套调用并仅使用常规函数调用。

_.each(obj.Things, processThing);

function processThing(thing) {
    _.each(thing.SubThings, processSubThing);
}

function processSubThing(subThing) {
    _.each(subThing.SubSubThing, processSubSubThing);
}

function processSubSubThin(subSubThing) {
    things.push(subSubThing);
}

如果使用ES6 / ES2015，则可以使用箭头功能

let processThing = thing => _.each(thing.SubThings, processSubThing);

let processSubThing = subThing => _.each(subThing.SubSubThing, processSubSubThing);

let processSubSubThin = subSubThing => things.push(subSubThing);

_.each(obj.Things, processThing);