For example, you want to set 40% alpha transparence to #000000
(black color), you need to add 66
like this #66000000
.
""" | |
Lyle Scott, III // lyle@ls3.io | |
Multiple ways to rotate a 2D point around the origin / a point. | |
Timer benchmark results @ https://gist.github.com/LyleScott/d17e9d314fbe6fc29767d8c5c029c362 | |
""" | |
from __future__ import print_function | |
import math |
""" | |
Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy) | |
BSD License | |
""" | |
import numpy as np | |
# data I/O | |
data = open('input.txt', 'r').read() # should be simple plain text file | |
chars = list(set(data)) | |
data_size, vocab_size = len(data), len(chars) |
Magic words:
psql -U postgres
Some interesting flags (to see all, use -h
or --help
depending on your psql version):
-E
: will describe the underlaying queries of the\
commands (cool for learning!)-l
: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
# ReachView code is placed under the GPL license. | |
# Written by Egor Fedorov (egor.fedorov@emlid.com) | |
# Copyright (c) 2015, Emlid Limited | |
# All rights reserved. | |
# If you are interested in using ReachView code as a part of a | |
# closed source project, please contact Emlid Limited (info@emlid.com). | |
# This file is part of ReachView. |
• 45-minute systems interview, focus on responding to real world problems with an unhealthy service, such as a web server or database. The interview will start off at a high level troubleshooting a likely scenario, dig deeper to find the cause and some possible solutions for it. The goal is to probe your knowledge of systems at scale and under load, so keep in mind the challenges of the Facebook environment.
• Focus on things such as tooling, memory management and unix process lifecycle.
More specifically, linux troubleshooting and debugging. Understanding things like memory, io, cpu, shell, memory etc. would be pretty helpful. Knowing how to actually write a unix shell would also be a good idea. What tools might you use to debug something? On another note, this interview will likely push your boundaries of what you know (and how to implement it).
Interview is all about taking an ambiguous question of how you might build a system and letting
// MultiExporter.jsx | |
// Version 0.1 | |
// Version 0.2 Adds PNG and EPS exports | |
// Version 0.3 Adds support for exporting at different resolutions | |
// Version 0.4 Adds support for SVG, changed EPS behaviour to minimise output filesize | |
// Version 0.5 Fixed cropping issues | |
// Version 0.6 Added inner padding mode to prevent circular bounds clipping | |
// | |
// Copyright 2013 Tom Byrne | |
// Comments or suggestions to tom@tbyrne.org |
I recently had the following problem:
- From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
- That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.
We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like
ssh -L 3306:localhost:3306 remotehost
import pyproj | |
from shapely.geometry import shape | |
from shapely.ops import transform | |
geom = {'type': 'Polygon', | |
'coordinates': [[[-122., 37.], [-125., 37.], | |
[-125., 38.], [-122., 38.], | |
[-122., 37.]]]} | |
s = shape(geom) |