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@rfong
rfong / add-ssh-user.sh
Last active May 9, 2017 01:20
make an ssh user on an ubuntu mashine
sudo adduser $USER
#sudo usermod -aG sudo $USER # Give user sudo?
su - $USER
mkdir ~/.ssh
chmod 0700 ~/.ssh
touch ~/.ssh/authorized_keys
chmod 0600 ~/.ssh/authorized_keys
vim ~/.ssh/authorized_keys
chown -R $USER:$USER ~/.ssh
@rfong
rfong / docker_cleanup.sh
Created January 29, 2017 02:33
#!/bin/bash
# remove exited containers:
docker ps --filter status=dead --filter status=exited -aq | xargs -r docker rm -v
# remove unused images:
docker images --no-trunc | grep '<none>' | awk '{ print $3 }' | xargs -r docker rmi
# remove unused volumes:
find '/var/lib/docker/volumes/' -mindepth 1 -maxdepth 1 -type d | grep -vFf <(
@rfong
rfong / django_enum.py
Last active February 22, 2017 19:24
from enum import Enum
from django.db import models
class Blips(Enum):
BLOOP = 1
BLIP_CHOICES = (
(SomeEnum.BLOOP, 'Bloop'),
)
@rfong
rfong / slinky_video.py
Last active February 3, 2017 19:27
Turn yourself into a slinky by time-delaying successive chunks of a webcam capture with OpenCV! https://vimeo.com/183155228
import copy
import datetime
import numpy as np
from optparse import OptionParser
import time
import cv2
from matplotlib import pyplot as plt
@rfong
rfong / video_edge_detection.py
Last active October 14, 2021 21:15
Simple live OpenCV transformation on image frames from webcam capture that renders edges as white on a black background.
import numpy as np
import cv2
def np_rotate_array(arr, shift):
"""Shift a numpy array to the right so that it wraps around."""
return np.concatenate([arr[shift:], arr[:shift]])
def main():
@rfong
rfong / angular-util.js
Last active December 3, 2019 23:42
Globally available utility library in a JS namespace, in case you aren't allowed to use lodash for some reason
// Globally available utility library.
(function (window, document) {
'use strict';
// attach as a property of window
var util = window.util || (window.util = {});
function uniqify(list) {
var uniqified = {};
@rfong
rfong / django_retry_decorator.py
Last active September 6, 2019 09:00
django retry decorator for tests
import unittest
from django.utils.functional import wraps
def retry(tries=1, ignore_exception=None):
"""
Decorator to retry a test.
:param ignore_exception: Exception class to catch.
:param tries: number of times to try running the wrapped function.
Don't use if you need to do something with the return value.
@rfong
rfong / angular-template.js
Last active December 3, 2019 23:41
/* Quick new angular app
* Accompany in template with:
<html ng-app="AppName"
ng-controller="AppCtrl">
*/
var app = angular.module('AppName', []);
app.config(['$interpolateProvider', '$httpProvider',
function($interpolateProvider, $httpProvider) {
// Change angular templating syntax from {{var}} to {[var]} so as not to
@rfong
rfong / django_mixins.py
Last active February 22, 2017 19:27
useful django queryset mixins. import in settings to use.
from django.db import models
from django.db.models.query import QuerySet
class QuerySetExplainMixin:
"""
Dump SQL EXPLAIN for a Queryset.
Usage: `queryset.explain()`
"""
def explain(self, analyze=False, verbose=False):
@rfong
rfong / cprint.py
Created October 29, 2015 10:04
colorfulprint
from cStringIO import StringIO
output = StringIO()
class bcolors:
HEADER = '\033[95m'
BLUE = '\033[94m'
GREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'