anfedorov

import re

class ReDict(dict):
    
    def __setitem__(self, key, value):
        dict.__setitem__(self, re.compile(key), value)

    def __getitem__(self, key):
        return [v for k,v in self.items() if k.match(key)]

anfedorov

from __future__ import division
from collections import namedtuple

Stats = namedtuple('Stats', 'count min max average variance')

def statgenerator(initial=None):
    l = u = None   # lower and upper values seen
    n = v = a = 0  # count, variance, average (arithmetic mean)
    q = 0          # running sum (see wikipedia)

anfedorov

from __future__ import division
from collections import namedtuple

Stats = namedtuple('Stats', 'count min max average variance')

def statgenerator(initial=()):
    l = u = None   # lower and upper values seen
    n = v = a = 0  # count, variance, average (arithmetic mean)
    q = 0          # running sum (see wikipedia)

anfedorov

from itertools import islice
from time import time

def after(n=0):
    while 1:
        n += 1
        yield n
        
def filter_factors(n, g):
    while 1:

anfedorov

from itertools import islice

def after(n=0):
    while 1:
        n += 1
        yield n
        
def filter_factors(n, g):
    while 1:
        x = g.next()

anfedorov

>>> def delay(n):
...     x = [None]*(n+1)
...     i = 0
...     while 1:
...         x[i] = yield(x[i])
...         i = (i + 1) % (n + 1)
... 
>>> f = delay(3)
>>> f.next()
>>> f.send(1)

anfedorov

>>> def foo(x,y):
        while 1:
            x = yield(x)
            y = yield(y)
    
>>> f = foo(1,2)

>>> f.next()
1
>>> f.send(3)

anfedorov

"Maximally functional" HTTP server

# High level

HTTPServer : (http_request, db) -> (response, db_delta)

# "Internals"

Resolve : http_request       -> db_query
Lookup  : db, db_query       -> data

anfedorov

function I(x) { return x; }

function walk(obj, pre, post) {
    var k, v;
    obj = (pre||I)(obj);
    if (typeof(obj) === 'object') {
        for (k in obj) if (obj.hasOwnProperty(k)) {
            v = (post||I)(walk(obj[k], pre, post));
            if (v === undefined) {
                delete obj[k];

anfedorov

    goog.memoize = function(f, opt_serializer) {
      var functionHash = goog.getHashCode(f);
      var serializer = opt_serializer || goog.memoize.simpleSerializer;
  
      return function() {
        // Maps the serialized list of args to the corresponding return value.
        var cache = this[goog.memoize.CACHE_PROPERTY_];
        if (!cache) {
          cache = this[goog.memoize.CACHE_PROPERTY_] = {};
        }