Undefined value (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Undefined value" in English language version.

refsWebsite

Global rank English rank

low place

9,807^th place

1web.archive.org

1^st place

1^st place

3,959^th place

3,208^th place

catb.org (Global: 3,959^th place; English: 3,208^th place)

"Nasal demons". Jargon File. Retrieved 2014-06-12.

perl.org (Global: low place; English: 9,807^th place)

perldoc.perl.org

"undef". Perl 5 documentation. 2009-09-25. Retrieved 2010-03-26.
"defined". Perl 5 documentation. 2009-09-25. Retrieved 2010-03-26.

web.archive.org (Global: 1^st place; English: 1^st place)

Carr, Richard (2006-10-01). "C# Nullable Numeric Data Types". C# Fundamentals tutorial. Archived from the original on 2007-01-21. Retrieved 2010-03-27.