课程: JavaScript: Maps and Sets

今天就学习课程吧！

今天就开通帐号，24,700 门业界名师课程任您挑！

Group entries with groupBy

Group entries with groupBy - JavaScript教程

课程: JavaScript: Maps and Sets

开始一个月试用 购买团队方案

Group entries with groupBy

“

- [Instructor] The groupBy method is a static map method that organizes elements of an iterable into groups based on values returned by a specific callback function. This is a really great enhancement for the map object and those of you that have been around JavaScript for a bit, you've probably seen something similar in libraries like Lodash and the Object Constructor also now utilizes groupBy as well. So it's a really wonderful and powerful method that can help you organize your data the way that you need it. And I'll show you an example of one particular way that you could potentially use groupBy in your own development. In this example, we have an array called inventory. In our inventory, we have effectively baking supplies. And let's say I own a bakery and I want to determine a very quick and easy way to know what things that I need to order. Usually for me and my bakery, if anything gets below a quantity of six, perhaps that's the time for me to restock. So if we think about how…

内容