vadr: Make R the language you wish R was like.
In crowding/vadr: Macros, metaprogramming, and pleasant programming idioms.

Description Details Author(s)

This package implements workalikes for the author's (and perhaps your) favorite features from other languages, making R programs shorter and more expressive. The centerpiece is an efficient facility for Common Lisp-style macros. Built on that are a nice destructuring-bind for parallel assignment of variables, a pipline macro similar to the "->" macro of Clojure, and other utilities.

Of note are:

chain, a function for increasing code clarity and concision by carrying the output of one function into the input of the next, akin to UNIX shell pipelines, or the -> macro of Clojure.
bind, an R-ish implementation of "destructuring bind" or parallel assignment.
index, which provides some "missing" indexing operations on data.frames;
qq or quasiquote, a more complete version of bquote;
dots which exposes dot lists (...) as first class objects with a useful API.
macro which helps write syntactic transforming functions and makes them fast;
fun, which is the shortest possible way to define a throwaway function.