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Latency Comparison Numbers
--------------------------
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
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD*              150,000   ns    0.15 ms

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#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <stdlib.h>

int map_create(lua_State *lua);
int map_slice(lua_State *lua);

int main(int argc, char **argv){
	lua_State *lua = lua_open();

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BREW_HOME=$HOME/.homebrew

    $ brew install zookeeper
    $ C_INCLUDE_PATH=${BREW_HOME}/Cellar/zookeeper/3.3.3/include/c-client-src/ pip install zkpython

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Browser histories

Unless you are using Safari on OSX, most browsers will have some kind of free plugin that you can use to export the browser's history. So that's probably the easiest way. The harder way, which seems to be what Safari wants is a bit more hacky but it will also work for other browsers. Turns out that most of them, including Safari, have their history saved in some kind of sqlite database file somewhere in your home directory.

The OSX Finder cheats a little bit and doesn't show us all the files that actually exist on our drive. It tries to protect us from ourselves by hiding some system and application-specific files. You can work around this by either using the terminal (my preferred method) or by using the Cmd+Shft+G in Finder.

Once you locate the file containing the browser's history, copy it to make a backup just in case we screw up.

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Default

Powerlevel9k

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Useful Links / Sources

PrestoDB Selects Doc

Housekeeping

change column type

ALTER TABLE logs.trades CHANGE recentprice price int;

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collapsible markdown?

CLICK ME

yes, even hidden code blocks!

print("hello world!")

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Note that this is sandbox. If you have not registered profiles in sandbox you 
will need to do so prior to making these calls. You will also need at least 
one campaign, ad group, and keyword before you see anything in the report. 
While in sandbox, we will return “dummy” data so that you can see how an actual 
report would look.
 
To make it look nicer, I always export my access token prior to making calls. 
You could do the same for API-Scope (profile Id) if you wish. Make sure to use 
quotes around the access token if it isn’t URL encoded. It has a | (pipe) 
symbol and your shell won’t like it.

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Why Git doesn't track renames – original email by Linus Torvalds

A copy / backup of Linus' email from 15 Apr 2005.

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#!/usr/bin/python -O

################################################################################
################################################################################
#
# State-Based Text Merging Algorithm
# For 6.033 Design Project 2
# TA: Katherine Fang
# 9 May 2012
#