javascript

• full support
• generator api translator tests
• target version: Ecmascript 5

JavaScript equivalents used for pseudo types and concepts:

Pseudo	JavaScript
List[T]	Array
Dictionary[K, V]	Object
Set[T]	Object with boolean values
Tuple[T1, T2..]	Array
Array	Array
Int	Number
Float	Number
String	String
for-loops	for, _.each
classes	objects and prototypical inheritance
methods	prototype functions
functions	functions

standard library

We use some standard javascript methods (.splice, .slice, Math...), node.js standard library (File) and lodash. JavaScript doesn't really have the equivalent of a all-implementations-use-it standard library historically, and lodash or underscore are widely used to fill that gap for a lot of base type methods, so that was a good match for pseudo's goal. In the future pseudo might add support for different JS api translators targeting/using different libraries/your own library

ecmascript version

Currently Ecmascript 5 is the most popular version, so that's what pseudo targets. Actually ES6/ES7/Coffeescript/Typescript are closer semantically and have a richer choice of builtin types/language structures, so they would be even easier to support in next versions.

future versions

io:read is not currently supported, because it's typically equivalent to a callback for the stdin stream in Node. Pseudo would support callback-based js api-s from v0.3 or v0.4