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Feature #10131

Greatest multiple of r not greater than x

Added by sawa (Tsuyoshi Sawada) about 6 years ago. Updated about 6 years ago.

Status:
Feedback
Priority:
Normal
Assignee:
-
Target version:
-
[ruby-core:64353]

Description

It happens too often to me that I want to calculate the greatest multiple of numeric r not greater than numeric x. This can be done by a simple operation below:

x, r = 3.7, 0.5
x.div(r).*(r) #=> 3.5

x, r = 41, 6
x.div(r).*(r) #=> 36

but I encounter this operation so often that I think it is an essential operation, and should be done as a single operation. Can any of the existing zero-ary operation be extended to take an optional argument to do this calculation? For example

3.7.floor(0.5) #=> 3.5
41.floor(6)    #=> 36

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