From: ruby-core@...
Date: 2017-03-16T18:46:11+00:00
Subject: [ruby-core:80191] [Ruby trunk Feature#13208] Vector.zero(n) and	vector.zero?

Issue #13208 has been updated by marcandre (Marc-Andre Lafortune).


Martin is exactly right. See https://en.wikipedia.org/wiki/Vacuous_truth

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Feature #13208: Vector.zero(n) and vector.zero?
https://bugs.ruby-lang.org/issues/13208#change-63630

* Author: qitar888 (Chia-sheng Chen)
* Status: Closed
* Priority: Normal
* Assignee: marcandre (Marc-Andre Lafortune)
* Target version: 
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Found that I need this recently, and class `Matrix` has these two function while `Vector` not.
So I add two function based on `Matrix` counterpart and also add test.

Usage

``` ruby
require 'matrix'
v = Vector.zero(3)  # => Vector[0, 0, 0]
v.zero?  # => true
w = Vector[1, 0, 0]
w.zero?  # => false
```

---Files--------------------------------
0001-Add-Vector.zero-n-and-vector.zero.patch (2.06 KB)


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