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

avoine

#!/usr/bin/env python
#
# Copyright 2012 Patrick Hetu <patrick.hetu@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,

olivierlacan

git config --global alias.hist "log --pretty=format:'%h %ad | %s%d [%an]' --graph --date=short"
git config --global alias.lol "log --graph --decorate --pretty=oneline --abbrev-commit --all"
git config --global alias.mylog "log --pretty=format:'%h %s [%an]' --graph"

To check that they've been added correctly, first run git config --list. You should see something like this in the midst of all your other configuration:

alias.hist=log --pretty=format:"%h %ad | %s%d [%an]" --graph --date=short

themartorana

#!/bin/sh
START=`date +%s%N`

# Do stuff here

END=`date +%s%N`
ELAPSED=`echo "scale=8; ($END - $START) / 1000000000" | bc`

keeperofthenecklace

# First attempting to use Capybara directly, you will ran into issues when trying to set HTTP header.
# Using Basic HTTP Authentication requires that we needed to set the header.
# Also we need to set the Content-Type and Accept headers to ensure that Rails handles the input and output correctly.
# When using Rack, Capybara delegates request and response handling down to Rack::Test. 
# So I used Rack::Test directly in my step definitions, and it works.
# Rack::Test has a module called Rack::Test::Methods that can be mixed into a class to provide it
# with methods for get, post, put, delete as well as last_request, last_response, header and more. 
# I mixed Rack::Test::Methods into the Cucumber world at the top of our API steps file like so:

##############################

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

benhosmer

f = open('user.yaml')

dataMap = yaml.load(f)

f.close()
print ""
print "=-----------="
print "dataMap is a ", type(dataMap), dataMap
print "=-----------="
print "main items are", type(dataMap['main']), dataMap['main']

KWMalik

##Google Interview Questions: Product Marketing Manager

• Why do you want to join Google? -- Because I want to create tools for others to learn, for free. I didn't have a lot of money when growing up so I didn't get access to the same books, computers and resources that others had which caused money, I want to help ensure that others can learn on the same playing field regardless of their families wealth status or location.
• What do you know about Google’s product and technology? -- A lot actually, I am a beta tester for numerous products, I use most of the Google tools such as: Search, Gmaill, Drive, Reader, Calendar, G+, YouTube, Web Master Tools, Keyword tools, Analytics etc.
• If you are Product Manager for Google’s Adwords, how do you plan to market this?
• What would you say during an AdWords or AdSense product seminar?
• Who are Google’s competitors, and how does Google compete with them? -- Google competes on numerous fields: --- Search: Baidu, Bing, Duck Duck Go

seratch

access_key_id: xxx
secret_access_key: yyy

mattratleph

vimdiff cheat sheet

##git mergetool

In the middle file (future merged file), you can navigate between conflicts with ]c and [c.

Choose which version you want to keep with :diffget //2 or :diffget //3 (the //2 and //3 are unique identifiers for the target/master copy and the merge/branch copy file names).

:diffupdate (to remove leftover spacing issues)

:only (once you’re done reviewing all conflicts, this shows only the middle/merged file)