I find it interesting that, because some design decisions seem odd to you at first sight, you immediately conclude that the reason is a poor understanding of Ja

I find it interesting that, because some design decisions seem odd to you at first sight, you immediately conclude that the reason is a poor understanding of JavaScript. The `toArray` function, for example, is just performance optimization: http://jsperf.com/toarray-slice-call-vs-loop http://jsperf.com/toarray-slice-call-vs-loop