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* lib/matrix.rb: New method #empty? [ruby-core:26284]

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27156 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
marcandre 2010-04-01 18:02:27 +00:00
parent 39aad8fa83
commit fac245828b
1 changed files with 10 additions and 2 deletions
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12
lib/matrix.rb
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@ -386,6 +386,14 @@ class Matrix
# TESTING -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- # TESTING -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#++ #++
#
# 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. # Returns +true+ if this is a regular matrix.
# #
@ -910,7 +918,7 @@ class Matrix
# Overrides Object#to_s # Overrides Object#to_s
# #
def to_s def to_s
if row_size == 0 || column_size == 0 if empty?
"Matrix.empty(#{row_size}, #{column_size})" "Matrix.empty(#{row_size}, #{column_size})"
else else
"Matrix[" + @rows.collect{|row| "Matrix[" + @rows.collect{|row|
@ -923,7 +931,7 @@ class Matrix
# Overrides Object#inspect # Overrides Object#inspect
# #
def inspect def inspect
if row_size == 0 || column_size == 0 if empty?
"Matrix.empty(#{row_size}, #{column_size})" "Matrix.empty(#{row_size}, #{column_size})"
else else
"Matrix#{@rows.inspect}" "Matrix#{@rows.inspect}"