signed0

from math import sqrt
from itertools import islice, chain

def subtract_coords(a, b):
    '''Returns a - b'''

    return (a[0] - b[0], a[1] - b[1])

def dot_product(a, b):
    return a[0] * b[0] + a[1] * b[1]

Rubentxu

package main

import (
    "fmt"
    "errors"
)

type Maybe interface {
    Return(value interface{}) Maybe
    Bind(func(interface{}) Maybe) Maybe

signed0

''''
From http://code.activestate.com/recipes/363602-lazy-property-evaluation/

Usage:

class MyClass():
    @lazyloaded
    def config(self):
        return {'yay': 'nay'}