[ruby-core:93925] [Ruby master Feature#16021] floor/ceil/round/truncate should accept a :step argument
From:
shyouhei@...
Date:
2019-07-26 02:17:16 UTC
List:
ruby-core #93925
Issue #16021 has been updated by shyouhei (Shyouhei Urabe). Status changed from Open to Feedback Dan0042 (Daniel DeLorme) wrote: > Equivalent to e.g. `((num / step.to_f).round * step)` > > ``` ruby > 12.3456.floor(step: 0.2) #=> 12.2 > ``` Can I ask you what do you expect for `12.3456.floor(step: 0.0002)` then? ---------------------------------------- Feature #16021: floor/ceil/round/truncate should accept a :step argument https://bugs.ruby-lang.org/issues/16021#change-80055 * Author: Dan0042 (Daniel DeLorme) * Status: Feedback * Priority: Normal * Assignee: * Target version: ---------------------------------------- These rounding methods currently accept a number of (decimal) digits, but a more general mechanism would allow rounding to the nearest multiple of 5, etc. Equivalent to e.g. `((num / step.to_f).round * step)` ``` ruby 12.3456.floor(step: 0.2) #=> 12.2 12.3456.round(step: 0.2) #=> 12.4 12.3456.floor(step: 0.2) #=> 12.4 12.3456.floor(step: 0.2) #=> 12.2 ``` IMHO this should also apply to Time#floor/round/ceil ``` ruby Time.now.floor(step: 3600) #=> current hour Time.now.round(step: 3600) #=> nearest hour Time.now.ceil(step: 3600) #=> next hour ``` We can also consider that instead of `:step` , `:by` might be quite readable. ``` ruby 12.3456.round(by: 0.2) #=> 12.4 ``` -- https://bugs.ruby-lang.org/ Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>