Briefly describe the use of angular custom filters in pages and controllers

Another feature of angularjs is that it provides a filter, which can operate the data results by operating the pipeline under UNIX.

By using pipes, it is convenient to display views in two-way data binding.

In the process of processing, the filter changes the data into a new format, and can use the chain style of pipeline, and can accept additional parameters.

First set the custom filter.

Define module name: angular

Use in the page.

Used in the controller.

First, inject $filter. When using it

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