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A library to inject common functional programming operations as methods into iterable objects.

Project description

A library to inject common functional programming operations as methods into iterable objects. Currently, it injects filter, flat_map, foldl, foldr, map, and reduce operations.

Getting the library

The library can be installed via pip install funcipy. Similarly, it can be uninstalled via pip uninstall funcipy.

Usage

When you want to inject common functional programming operations as methods into an object O, invoke funcipy.funcipy.funcify function with O as the argument. If O is iterable, then the function will return an object that

  1. provides the same interface as the input object and
  2. has functional programming operations as methods.

Otherwise, O is returned as is.

Here are few example invocations.

from funcipy.funcipy import funcify
import functools
import itertools
import operator

i = range(5, 15)
print("Map function: " + ' '.join(map(str, i)))
tmp1 = funcify(i)
print("Map function applied to funcified object: " + ' '.join(map(str, tmp1)))
print("Map method: " + ' '.join(tmp1.map(str)))
print("Map and Filter Method chaining: " +
      ' '.join(tmp1.filter(lambda x: x % 2).map(str)))

print("Reduce function: " + str(functools.reduce(operator.add, i, 5)))
print("Reduce method: " + str(tmp1.reduce(operator.add, 5)))
print("Reduce function: " + str(functools.reduce(operator.sub, i)))
print("Foldl method: " + str(tmp1.foldl(operator.sub)))
print("Foldr method: " + str(tmp1.foldr(operator.sub)))
print("Flat-map operation: " + ' '.join(itertools.chain.from_iterable(
    map(str, i))))
print("Flat-map method: " + ' '.join(funcify(i).flat_map(str)))

Attribution

Copyright (c) 2017, Venkatesh-Prasad Ranganath

Licensed under BSD 3-clause “New” or “Revised” License (https://choosealicense.com/licenses/bsd-3-clause/)

Authors: Venkatesh-Prasad Ranganath

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