My favourite part of the book "Clean Code" so far is the chapter where he advocates that functions ideally have zero arguments and then advocates that functions ideally do not have side effectspic.twitter.com/ylRTNSbWwy
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To be clear, a function with zero arguments and no side effects is a constant
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So, what the author means by "functions" is "methods". With a method, there's always one implicit "argument", `this`, the object on which the method is being called. What he's actually asserting is that the ideal method only interacts with `this`
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Additionally, he doesn't consider it to be a side-effect when a method call interacts with `this` (sets member variables, for example)
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So, for example, instead of one method passing a Boolean flag `isSuite` into an inner method call, he sets `this.isSuite = isSuite` in the first method and then reads from `this.isSuite` in the inner method
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As we see here: https://github.com/ludwiggj/CleanCode/blob/master/src/clean/code/chapter03/SetupTeardownIncluder.java#L28-L33 …
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End of conversation
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Wait are you saying I was keeping my setters side-effect free for no good reason?
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This is terrible terrible advice
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