Bug #18983
closedRange#size for beginless Range is not nil.
Description
Range#size
should, according to Official docs,
Returns the count of elements in self if both begin and end values are numeric; otherwise, returns nil
but it doesn't with beginless non-Numeric Ranges (in Ruby-3.1.2 or earlier).
(..?a).size # => Infinity
(nil..nil).size # => Infinity
whereas it certainly does with endless Ranges
(?a..).size # => nil
Files
Updated by thiagofm (Thiago Massa) about 2 years ago
- File 6378.patch 6378.patch added
Updated by thiagofm (Thiago Massa) about 2 years ago
Nevermind. Build failed.
Updated by jeremyevans0 (Jeremy Evans) about 2 years ago
Returning Infinity for numeric ranges bounded in either direction is expected (there are tests explicitly for it).
It does seem inconsistent that (..object).size
returns Infinity and (object..).size
returns nil for non-numeric objects. I think returning nil in both cases makes sense.
Updated by mame (Yusuke Endoh) about 2 years ago
- Related to Bug #14699: Subtle behaviors with endless range added
Updated by matz (Yukihiro Matsumoto) about 2 years ago
I agree with inconsistency; if edges were numeric, return the count (or Infinity), otherwise it should return nil.
nil .. nil
can be considered as numeric-range both edge omitted, but at the moment I feel it should return nil as well.
Let us experiment how it works.
Matz.
Updated by mame (Yusuke Endoh) about 2 years ago
Updated by mame (Yusuke Endoh) about 2 years ago
Oops, I missed the attached patch. Sorry
Updated by mame (Yusuke Endoh) about 2 years ago
- Status changed from Open to Closed
Applied in changeset git|e026368061c56bc925aff58910a4b02f18b78c70.
Range#size returns nil for (.."a") and (nil..)
Fixes [Bug #18983]