Metadata

ID: ruby-best-practices/float-division

Language: Ruby

Severity: Notice

Category: Best Practices

Description

The rule requires the use of fdiv for division of two integers when the desired result is a float. This is important because in Ruby, the division of two integers results in an integer. The use of fdiv ensures the result is a float, which can be crucial when precision is required in the calculations.

Non-compliance to this rule can lead to inaccurate results due to integer division. For example, 5 / 2 would result in 2, not 2.5 as one might expect. To avoid this, it is recommended to use the fdiv method which ensures a float result. For example, calling 5.fdiv(2) would correctly return 2.5.

Remember, it’s important to understand the behavior of the language you’re using and to use its methods appropriately to ensure the accuracy of your calculations. In Ruby, when dealing with division and expecting a float result, use fdiv to avoid potential precision loss.

Non-Compliant Code Examples

foo.to_f / bar.to_f

Compliant Code Examples

foo.to_f / bar
foo / bar.to_f
foo.fdiv(bar)

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