pyChaining 0.0.2

java stream style(high order, map reduce and method chaining) library for simplify the multiple map and filter operations

Installation

pip install xethhung/pyChaining

Usage

from pyChaining import Chains

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).list()
assert xx == [1, 2, 3, 4, 5, 6, 7]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).filter(lambda x: x % 2 == 1).list()
assert xx == [1, 3, 5, 7]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).filter(lambda x: x % 2 == 1).map(lambda x: x * 2).list()
assert xx == [2, 6, 10, 14]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).filter(lambda x: x % 2 == 1).map(lambda x: x * 2)
    .skip(1).list()
assert xx == [6, 10, 14]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).filter(lambda x: x % 2 == 1).map(lambda x: x * 2)
    .skip(2).list()
assert xx == [10, 14]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).filter(lambda x: x % 2 == 1).map(lambda x: x * 2)
    .first()
assert xx == 2

xx = Chains.of([1, 2, 3, 4, 5, 6, 7]).filter(lambda x: x % 2 == 1).map(lambda x: x * 2)
    .last()
assert xx == 14

xx = Chains.of([1, 2, 3, 4, 5, 6, 7])
    .skipUntil(lambda x: x == 2).list()
assert xx == [2, 3, 4, 5, 6, 7]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7])
    .stopBefore(lambda x: x == 5).list()
assert xx == [1, 2, 3, 4]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7])
    .stopAt(lambda x: x == 5).list()
assert xx == [1, 2, 3, 4, 5]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7])
    .stopAfter(lambda x: x == 5, 1).list()
assert xx == [1, 2, 3, 4, 5, 6]

xx = Chains.of([1, 2, 3, 4, 5, 6, 7])
    .flatMap(lambda x: [x, x]).list()
assert xx == [1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7]

xx = Chains.of([[1, 2, 3], [4, 5], [6, 7]])
    .flatten().list()
assert xx == [1, 2, 3, 4, 5, 6, 7]