FAQ: Object-Oriented Programming II - A Few Requirements

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This community-built FAQ covers the “A Few Requirements” exercise from the lesson “Object-Oriented Programming II”.

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2

Hello,
How come this date module must be requested between comas, implying it’s a string?
In my opinion it should have been required like so: require Date but instead it’s required like below:

require “date”

Thanks,
Fanny

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3

The reason there are quotes is because modules have file names. They are not identifiers in the global namespace.

Modules

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4

Hello! I’m wondering why we don’t use a capitalised version of “Date” when we require the module?

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5

Because we loading a file, not importing a class. The file name will look like, “date.rb” or something similar.

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6

The notes read " Some modules, like Math , are already present in the interpreter. Others need to be explicitly brought in [.]"

Brought in from where? Additionally, since they were not explicitly user-defined modules, why were they left out of the interpreter?

7

Date is part of the Ruby standard library - in my case, the module is in a file in a folder within my Ruby installation folder as date.rb

Files containing modules that don’t need require to work are part of the Ruby Core. For example, Math is ready to use without require. See also Ruby Core API Vs Standard Library and this answer on Reddit for more on why.

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