sstephenson/prototype — comment on commit 460be4691af9e4e92908c9ac707597bad69be57c
File: src/prototype/lang/array.js line 517
By keithamus:

Sincerest apologies, I missed the part about conforming to the spec, requiring `length` to be ToUInt32. (For everyone else, read here: http://es5.github.com/#x15.4.4.19 - step #4).