fx

====================================== fx - a functional programming approach

::

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| | _ | |'| || |,|igher-order function coding.

Introduction

TL;DR - YAGNI.

Inspired by Haskell <http://www.haskell.org/>'s rich set of operators, this is an approach to functional programming with operators in Python <http://www.python.org/>.

"It's fun... It's insane... It's insanely fun."

-- John Doe

Features

• Currying functions with <<, &
• Piping output of functions with |
• Composing functions with **
• Flipping order of arguments of function with ~
• and more

Examples

::

from fx import f double_all = f(map) << 2 .mul | list double_all([1, 2, 3]) [2, 4, 6] double_all |= f(map) << str | ' '.join double_all([1, 2, 3]) '2 4 6' sum_upto = 1 .add | f(range) << 1 | sum sum_upto(100) 5050 parse_hex_str = ~f(int) << 16 parse_hex_str('ff') 255 parse_hex_str('c0ffee') 12648430

project euler problem 1

euler_p1 = f(range) << 1 | f(filter) << (lambda n: n % 3 == 0 or n % 5 == 0) | sum euler_p1(10) 23 euler_p1(1000) 233168

project euler problem 20

fact = f(lambda n: 1 if n == 1 else n * fact(n - 1)) euler_p20 = str ** fact | sum ** f(map) << int euler_p20(10) 27 euler_p20(100) 648

Requirements

• CPython >= 2.6

Installation

Install from PyPI::

pip install fx

Install from source, download source package, decompress, then cd into source directory, run::

make install

License

BSD New, see LICENSE for details.

Links

Documentation: http://fx.readthedocs.org/

Issue Tracker: https://bitbucket.org/pyx/fx/issues/

Source Package @ PyPI: http://pypi.python.org/pypi/fx/

Mercurial Repository @ bitbucket: https://bitbucket.org/pyx/fx/

Git Repository @ Github: https://github.com/pyx/fx/