Modern JavaScript from the Beginning - Second Edition - Maps

The video tutorial introduces maps, a data structure added in ES2015, explaining their key-value pair nature. It covers how to create a map, add and retrieve data using set and get methods, and check for key existence with the has method. The tutorial also demonstrates deleting keys, iterating over maps with foreach, and converting maps to arrays. A practical example of using maps in a poll project is discussed, highlighting their utility in tracking poll answers and votes.

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