Exercises in Programming Style–Things

Yan Cui

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NOTE : read the rest of the series, or check out the source code.

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Following on from the last post, we will look at the Things style today.

Style 10 – Things

You may also know this style as OOP.

Larger problem is decomposed into things that make sense for the problem domain
Each thing is a capsule of data that exposes procedures to the rest of the world
Data is never accessed directly, only through these procedures
Capsules can re-appropriate procedures defined in other capsules

First, we have a thing for storing data from a file:

Then, we another thing for storing the stop words we’ll dealing with later:

Next, we have another thing that keeps track of the word frequencies:

Finally, we have a thing that controls the flow of our application:

And to tie everything together, we need to construct and run the controller:

Voila!

You can find the source code for this exercise here.

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