When the call to a function doesn’t have any side effects, what is the point of making the call if the results are ignored? In such case, either
the function call is useless and should be dropped or the source code doesn’t behave as expected.
This rule raises an issue on the following methods of the Swift standard library:
-
abs function
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signum method
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distance method
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advanced method
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addingProduct method
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squareRoot method
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remainder, truncatingRemainder methods
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rounded method
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dropLast, drop, dropFirst methods
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lowercased, uppercased methods
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sorted, reversed methods
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prefix, suffix methods
