See: https://robferguson.org/blog/2018/09/28/ionic-3-filtering-sorting-and-pipes/
Every application starts out with what seems like a simple task: get some data, transform it, and then show it to your users. You can use a service to fetch data from your server and a pipe to transform it. However, Angular doesn’t provide pipes for filtering or sorting lists.
Angular doesn’t provide them because …
