chitchcock

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

schlamar

import os
import sys
import traceback
from functools import wraps
from multiprocessing import Process, Queue


def processify(func):
    '''Decorator to run a function as a process.
    Be sure that every argument and the return value

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

FredLoney

import inspect
import logging

HEADER_FMT = "Call stack at %s, line %d in function %s, frames %d to %d of %d:"
"""The log header message formatter."""

STACK_FMT = "%s, line %d in function %s."
"""The log stack message formatter."""

def log_stack(logger=None, limit=None, start=0):

Hamatti

function parse_git_branch_name {                                                
  git rev-parse --abbrev-ref HEAD                                             
}                                                                               

function parse_git_description {                                                
  git config branch.$(parse_git_branch_name).description                      
}

alias gs='echo $(parse_git_branch_name): $(parse_git_description) && git status'

miki725

#!/bin/bash
#
# DESCRIPTION:
#
#   Set the bash prompt according to:
#    * the active virtualenv
#    * the branch of the current git/mercurial repository
#    * the return value of the previous command
#    * the fact you just came from Windows and are used to having newlines in
#      your prompts.

greeness

simple and clear algorithm description:
http://www.titouangalopin.com/blog/articles/2014/05/simhash-or-the-way-to-compare-quickly-two-datasets

a python impl
http://liangsun.org/posts/a-python-implementation-of-simhash-algorithm/

original paper of simhash
http://www.cs.princeton.edu/courses/archive/spr04/cos598B/bib/CharikarEstim.pdf

simhash impl doc

alukach

from django.contrib import admin, messages
from django.http import HttpResponseRedirect
from django.shortcuts import render

from my_app.forms import CustomForm


class FakeModel(object):
    class _meta:
        app_label = 'my_app'  # This is the app that the form will exist under

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.

julianlam

Exposing a directory on the host machine to an LXC container

1. Log into the container and create an empty directory, this will be the mount point
2. Log out and stop the container.
3. Open to your container's config file
   • For regular LXC containers: /var/lib/lxc/mycontainer/config
   • For unprivileged LXC containers: $HOME/.local/share/lxc/mycontainer/config
4. Add a new line above the lxc.mount directive, that follows the format below. Substitute proper paths as necessary:
   • lxc.mount.entry = /path/to/folder/on/host /path/to/mount/point none bind 0 0

• Both of these paths are relative to the host machine.