Parallel JS will soon be included in Firefox Nightly builds. This project was initially called River Trail . It automatically parallelizes code that uses the ParallelArray type and its array-like methods (map() etc.). [Source of this post: “Parallel JS lands” by Nicholas D. Matsakis.]
(Note: a blog post on the March TC39 meeting will be posted at some time in the future.)
This blog post explores the Lehmer code, a way of mapping integers to permutations. It can be used to compute a random permutation (by computing a random integer and mapping it to a permutation) and more.
Twitter’s “Follow” button has an HTML5 context menu . The button below allows you to try it out. On Firefox, you get a context menu whose top three items are “Follow”, “@rauschma on Twitter” and “Tweet to @rauschma”. Alas, other browsers don’t support the customization of context menus, yet.