gavinwahl

from math import ceil

def split_up(s, length=160):
    """
    Splits the string s into pages of no longer than length. Includes
    pages numbers. Tries not to split in the middle of a word.

    >>> split_up("abc", 5)
    ['abc']
    >>> split_up("abcdef", 5)

gavinwahl

from itertools import tee

class consume_once(object):
    """
    Takes an iterator and returns an iterable that can be consumed
    multiple times while only consuming the original a single time.

    >>> x = consume_once(i for i in range(3))
    >>> list(x)
    [0, 1, 2]

gavinwahl

CREATE OR REPLACE FUNCTION check_fk_child() RETURNS trigger AS $$
DECLARE
  fk_local TEXT := TG_ARGV[0];
  parent_table TEXT := TG_ARGV[1];
  fk_val INT;
  is_valid BOOLEAN;
  query TEXT;
BEGIN
  -- fk_val = getattr(NEW, fk_local)
  EXECUTE format('SELECT $1.%I', fk_local) USING NEW INTO fk_val;

gavinwahl

var group_reduce = function (dependentKey, key_func, reduce) {
  return Ember.reduceComputed.call(null, dependentKey, {
    initialValue: Ember.A,
    initialize: function(initialValue, changeMeta, instanceMeta) {
      instanceMeta.meta = new Ember.Map();
    },
    addedItem: function (accumulatedValue, obj, changeMeta, instanceMeta) {
      var key = key_func(obj), reduced_object;

      if (instanceMeta.meta.get(key) === undefined) {

gavinwahl

from abc import ABCMeta, abstractmethod


class AbstractModelMeta(ABCMeta, type(models.Model)):
    pass

class ABCModel(models.Model):
    __metaclass__ = AbstractModelMeta

    class Meta:

gavinwahl

{-# LANGUAGE RankNTypes #-}

type Lens t i =  Functor f => (i -> f i) -> t -> f t

data Person = Person { _name :: String, _age :: Int } deriving Show

nameLens :: Lens Person String
nameLens f (Person name age) = fmap (\newName -> Person newName age) (f name)

ageLens :: Lens Person Int

gavinwahl

{-# LANGUAGE RankNTypes #-}


(!) = flip (.)

lit :: a -> s -> (s, a)
lit x s = (s, x)

run :: (forall a. a -> (a, b)) -> b
run x = snd $ x undefined

gavinwahl

class CheckedAtBooleanField(models.DateTimeField):
    """
    A db field that acts like a checkbox in forms, but is backed by a
    DateTimeField in the database. `None` represents that the box was
    not checked, a timestamp value indicates that the box was checked
    at that time. If the form is saved again, the time is not updated.

    Specifically, the timestamp indicates when a user chose to opt in.

    When setting the attribute on the model, it's possible to use the

gavinwahl

diff --git a/django/utils/functional.py b/django/utils/functional.py
index c512084..11a5500 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -84,13 +84,14 @@ def lazy(func, *resultclasses):
         called on the result of that function. The function is not evaluated
         until one of the methods on the result is called.
         """
-        __dispatch = None
+        __prepared = False

gavinwahl

def terminal_split(items, is_terminal):
    SENTINAL = object()
    ret = [[]]
    for item, next_item in izip_longest(items, items[1:], fillvalue=SENTINAL):
        ret[-1].append(item)
        if next_item is not SENTINAL and is_terminal(item) and not is_terminal(next_item):
            ret.append([])
    return ret

def is_terminal(x):