Bug #1518: Matrix#[] Raises NoMethodError for Invalid Index

• Status: Closed
• Assignee: keiju (Keiju Ishitsuka)

[runpaint (Run Paint Run Run)]

=begin

m = Matrix[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
>> m[2,8]
=> nil
>> m[8,2]
NoMethodError: undefined method []' for nil:NilClass from /usr/lib/ruby/1.9.0/matrix.rb:264:in []'
from (irb):13
from /usr/bin/irb1.9:12:in `

'

The #[] accessor for Matrix raises a particularly disconcerting NoMethodError when its passed an index which is out of bounds for the second argument. To be consistent with itself, it should return nil when either index is invalid.
=end

[marcandre (Marc-Andre Lafortune)]

• Category set to lib
• Assignee set to keiju (Keiju Ishitsuka)

=begin

=end

[keiju (Keiju Ishitsuka)]

• Status changed from Open to Closed

=begin

=end