(via Coffeescript)
The name pazy is a contraction of persistent and lazy.
This is my humble attempt at implementing a collection of practical, immutable data structures for use in my Javascript projects. I am using Coffeescript instead of plain Javascript because it provides a clutter-free way of writing code that translates into clean and straightforward Javascript.
Currently included are various collection classes inspired by Rich Hickey’s persistent hash tries (as found in his Clojure programming language), several data structures described by Chris Okasaki in his PhD thesis, an experimental implementation of arbitrary precision integers based on lazy sequences, a union-find data structure and some useful primitives such as suspend and recur/resolve. The latest addition are finger trees.
I am not a specialist in functional programming or data structures, and I am fairly new to Javascript, so more than anything else, this is about me figuring out how these things work. Nonetheless, I am trying to make the code as efficient and robust as possible without sacrificing clarity.
A test suite using the fantastic Jasmine framework is included.
This code is being made available under the MIT Licence
Copyright © 2011 Olaf Delgado-Friedrichs (odf@github.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.