Collection and their methods must show examples

[zakishaheen]

Please complete the information below:

Where is the problem?

Every collection e.g. Map, List, etc.

What is the problem?

Usage examples are not provided which makes it hard for beginners to understand, e.g. how function pointers work or how to even use the API.

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Please don't change anything below this point.

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• Build ID: 2018-07-06T21:05:29+0000:0afe35d8f6fa936bb97d49ea0448dab4d6a1b159
• Page requested: /hack/reference/class/HH.Map/map/
• Page requested at: Wed, 11 Jul 2018 18:31:29 +0000
• Controller: APIMethodPageController