chekunkov

#!/usr/bin/env python
import sys
import pprint


def displayhook_pprint(o):
    """Display hook powered by pprint.

    https://www.python.org/dev/peps/pep-0217/

conormm

R to python data wrangling snippets

The dplyr package in R makes data wrangling significantly easier. The beauty of dplyr is that, by design, the options available are limited. Specifically, a set of key verbs form the core of the package. Using these verbs you can solve a wide range of data problems effectively in a shorter timeframe. Whilse transitioning to Python I have greatly missed the ease with which I can think through and solve problems using dplyr in R. The purpose of this document is to demonstrate how to execute the key dplyr verbs when manipulating data using Python (with the pandas package).

dplyr is organised around six key verbs:

n-st

javascript:(function(){if(location.href.indexOf('http')!=0){input=prompt('URL:','http://');if(input!=null){location.href='http://web.archive.org/web/*/'+input}}else{location.href='http://web.archive.org/web/*/'+location.href;}})();

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

bkaradzic

Orthodox C++

What is Orthodox C++?

Orthodox C++ (sometimes referred as C+) is minimal subset of C++ that improves C, but avoids all unnecessary things from so called Modern C++. It's exactly opposite of what Modern C++ suppose to be.

Why not Modern C++?

bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

need12648430

import sys
from quarrel import Quarrel

@Quarrel("multiply", int, int)
@Quarrel("multiply", int)
def multiply_int(a, b = 2):
  print(a * b)

@Quarrel("greet", str)
def greet(name):

bluetech

#!/usr/bin/python2
"""Display the error message for an Oracle error either from the internet
or from the cache db, based on the error code ("the query") you get when
confronted with the error."""

import sys, os, re, urllib2, urlparse, anydbm
from BeautifulSoup import BeautifulSoup

BASE_URL = "http://download.oracle.com/docs/cd/B19306_01/server.102/b14219/"
TOC_URL = BASE_URL + "toc.htm"

jkominek

#!/usr/bin/python

#################
# NOTE
# Now at https://github.com/jkominek/updatestars
#################

import requests
import json
import re

isaacs

# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.