simonmichael

# unregister broken GHC packages. Run this a few times to resolve dependency rot in installed packages.                                                                                                                                     
# ghc-pkg-clean -f cabal/dev/packages*.conf also works.                                                                                                                                                                                     
function ghc-pkg-clean() {
    for p in `ghc-pkg check $* 2>&1  | grep problems | awk '{print $6}' | sed -e 's/:$//'`
    do
        echo unregistering $p; ghc-pkg $* unregister $p
    done
}

# remove all installed GHC/cabal packages, leaving ~/.cabal binaries and docs in place.                                                                                                                                                     

eranation

//equivalent of "select count (distinct fieldName) from someTable"
db.someCollection.aggregate([{ $group: { _id: "$fieldName"}  },{ $group: { _id: 1, count: { $sum: 1 } } } ])

Nurdok

Python Number Conversion Chart

From	To	Expression

krisys

'''
The MIT License (MIT)

Copyright (c) 2013 Krishna Bharadwaj <krishna@krishnabharadwaj.info>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is

arvearve

Mathematics: What do grad students in math do all day?

by Yasha Berchenko-Kogan

A lot of math grad school is reading books and papers and trying to understand what's going on. The difficulty is that reading math is not like reading a mystery thriller, and it's not even like reading a history book or a New York Times article.

The main issue is that, by the time you get to the frontiers of math, the words to describe the concepts don't really exist yet. Communicating these ideas is a bit like trying to explain a vacuum cleaner to someone who has never seen one, except you're only allowed to use words that are four letters long or shorter.

What can you say?

Airblader

#!/usr/bin/env python2.7
# -*- coding: utf-8 -*-
# vim:ts=2:sw=2:expandtab

import os
import xcb
from xcb.xproto import *
from PIL import Image

XCB_MAP_STATE_VIEWABLE = 2

AlexeyMK

def d(*args):
  d_name = 'd'
  import inspect

  cur = inspect.currentframe()
  calling_frame = inspect.getouterframes(cur)[1]
  frameinfo = inspect.getframeinfo(calling_frame[0])
  string = frameinfo.code_context[0].strip()
  import ast
  ast_module = ast.parse(string)

vinhkhuc

# Implementation of a simple MLP network with one hidden layer. Tested on the iris data set.
# Requires: numpy, sklearn>=0.18.1, tensorflow>=1.0

# NOTE: In order to make the code simple, we rewrite x * W_1 + b_1 = x' * W_1'
# where x' = [x | 1] and W_1' is the matrix W_1 appended with a new row with elements b_1's.
# Similarly, for h * W_2 + b_2
import tensorflow as tf
import numpy as np
from sklearn import datasets
from sklearn.model_selection import train_test_split

jgoosey

--Haskell Quine
--Implementation 1
import Control.Monad
import Control.Monad.Instances
main = (putStr . ap (++) show)
  "--Haskell Quine\n--Implementation 1\nimport Control.Monad\nimport Control.Monad.Instances\nmain = (putStr . ap (++) show) "

--Implementation 2
--main = putStrLn (s ++ show s) where s =
--  "--Haskell Quine\n--Implementation 2\nmain = putStrLn (s ++ show s) where s ="

owainlewis

module Example () where

import Network.HTTP

-- Non HTTPS

-- 1. Perform a basic HTTP get request and return the body
get :: String -> IO String
get url = simpleHTTP (getRequest url) >>= getResponseBody