Creating a Map from the existing data

We just saw how to add values individually to maps. This can be tedious, however. For example, if we are working with a dataset that might be very large or unknown ahead of time, it would be nice to initialize a map with a function call rather than hundreds or thousands.

In this recipe, we'll take a look at how to create a new Map with the preexisting data.

Getting ready

This recipe assumes that you already have a workspace that allows you to create and run ES modules in your browser. If you don't, refer to the first two chapters.

How to do it...

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