Tuesday, August 19th, 2008
>Alex Russell has seen the confusion of the many names that were bandied around with the Harmony news last week. There are so many names, that involve specs, projects, and general technical jargon that it can get a little confusing. Alex has made it very clear:
- ECMAScript 3
- ECMAScript 4
A new language which was to be mostly backwards compatible but add optional (gradual) typing and class-based inheritance. Based loosely on Adobe’s ActionScript 3. This is the language effort which died as a result of Harmony.
- ECMAScript 3.1
- Aka: ES3.1. A set of small additions to ES3.
Planning for this edition was started at Microsoft and Yahoo’s behest late last year, causing the split in the working group which has been healed by the Harmony announcement.
- ActionScript 3
- Aka: AS3
compiler from Adobe) in order to be usable by programmers.
- A VM which implements the same byte-code language as Tamarin (known as “ABC”) but which is designed for use in mobile devices and other scenarios where code size and VM footprint are important. It implements trace-tree JIT-ing as a way to speed up hot-spots. Also donated to Mozilla by Adobe.
- A new code-name for a language which is to come after ES3.1. It will feature many of the things ES4 was trying to accomplish, but may attempt them from different directions and will
focus much more on incremental, step-wise evolution of the language.
Posted by Dion Almaer at 7:48 am