[1] X Sharp/Nodes (2009-01-22 20:51:58 +09:00 版) <http://wiki.codeglide.com/X_Sharp/Nodes#The_in_operator>

[2] Bug 623437 – Making an argument optional changes the order in which the method is enumerated ( (2011-08-26 23:32:09 +09:00 版)) <https://bugzilla.mozilla.org/show_bug.cgi?id=623437>

[3] 623437 – Making an argument optional changes the order in which the method is enumerated ( (2013-12-05 07:41:47 +09:00 版)) <https://bugzilla.mozilla.org/show_bug.cgi?id=623437>

[4] Web Applications 1.0 r6529 internal note to avoid changing canvas method order in the future ( (2011-08-26 09:52:00 +09:00 版)) <http://html5.org/tools/web-apps-tracker?from=6528&to=6529>

[5] 631117 – js1k demo no longer working ( (2013-12-05 07:43:10 +09:00 版)) <https://bugzilla.mozilla.org/show_bug.cgi?id=631117>