Feature #2265: Matrix#empty? [patch]

• Status: Closed
• Assignee: marcandre (Marc-Andre Lafortune)
• Target version: 1.9.2

[marcandre (Marc-Andre Lafortune)]

=begin
Now that the Matrix library handles well empty matrices, how about a new instance method #empty?

diff --git a/lib/matrix.rb b/lib/matrix.rb
index b577ef3..45ef25e 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -386,6 +386,14 @@ class Matrix
#++

#

• Returns +true+ if this is an empty matrix, i.e. if the number of rows

• or the number of columns is 0.

• def empty?
• column_size == 0 || row_size == 0
• end

• Returns +true+ if this is a regular matrix.

def regular?
@@ -924,7 +932,7 @@ class Matrix

Overrides Object#to_s

def to_s

• if row_size == 0 || column_size == 0

• if empty?
  "Matrix.empty(#{row_size}, #{column_size})"
  else
  "Matrix[" + @rows.collect{|row|
  @@ -939,7 +947,7 @@ class Matrix

Overrides Object#inspect

def inspect

• if row_size == 0 || column_size == 0

• if empty?
  "Matrix.empty(#{row_size}, #{column_size})"
  else
  "Matrix#{@rows.inspect}"
  =end

[marcandre (Marc-Andre Lafortune)]

• Assignee changed from keiju (Keiju Ishitsuka) to marcandre (Marc-Andre Lafortune)
• Target version set to 1.9.2

=begin

=end

[marcandre (Marc-Andre Lafortune)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

=begin
This issue was solved with changeset r27156.
Marc-Andre, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end