Aron Podrigal ar45

Useful Bash Features

Ctrl + r - search through command history
Alt + * - expand the * before running
Ctrl + Alt + e - expand the variables and aliases before running
Alt + # - turn current command into a comment and put it into history

AngularJS Directive Attribute Binding Explanation

When using directives, you often need to pass parameters to the directive. This can be done in several ways. The first 3 can be used whether scope is true or false. This is still a WIP, so validate for yourself.

Raw Attribute Strings

<div my-directive="some string" another-param="another string"></div>

	function interpolateUrl(url, params, replaceMissing) {
	return url.replace(/:([^\/]+)/g, (match, p1) => {
	return params[p1] \|\| ( replaceMissing ? '' : match );
	});
	}

	def thr = Thread.currentThread()
	def build = thr?.executable
	def env = build.getBuildVariables()
	//def env = build.getEnvironment()

	println env
	def ghprbCommentBody = env.get("ghprbCommentBody")
	println "ghprbCommentBody=$ghprbCommentBody"

	from functools import lru_cache, wraps


	class cached_method:
	"""Decorotor for class methods.
	Using pythons non data descriptor protocol, creates a new `functools.lru_cache` funcion wrapper
	on first access of a instances method to cache the methods return value.
	"""
	def __new__(cls, func=None, **lru_kwargs):
	if func is None:

	DO $$
	DECLARE
	stmt TEXT;
	BEGIN
	FOR stmt IN SELECT 'DROP TABLE IF EXISTS "' \|\| tablename \|\| '" CASCADE;'
	from pg_tables
	WHERE schemaname = 'public'
	LOOP
	EXECUTE stmt;
	END LOOP;

	for file in `cat files.txt`;
	do
	outfile=/tmp/`basename $file`;
	ffmpeg -i $file -ar 8000 -ac 1 -acodec pcm_s16le -ab 128k $outfile \
	&& mv $outfile $file;
	done;

	from sqlalchemy.engine import create_engine
	from sqlalchemy.orm import sessionmaker


	def create_engine_from_django_settings(database='default'):
	from django.conf import settings
	db = settings.DATABASES[database]
	engine = db['ENGINE'].lower()
	if 'postgresql' in engine:
	sqlalchemy_engine = 'postgresql'

	[Unit]
	Description=Chrome browsers cgroup
	After=multi-user.target

	[Service]
	ExecStart=/bin/bash -x -c '[ -d /sys/fs/cgroup/memory/user.slice/chrome ] \|\| /bin/mkdir /sys/fs/cgroup/memory/user.slice/chrome; chmod 766 /sys/fs/cgroup/memory/user.slice/chrome/tasks; echo "Satrting"; CHROME_MEMORY_LIMIT_IN_BYTES=${CHROME_MEMORY_LIMIT_IN_BYTES:-5368709120}; echo "${CHROME_MEMORY_LIMIT_IN_BYTES}" >/sys/fs/cgroup/memory/user.slice/chrome/memory.limit_in_bytes; echo "Setting CHROME_MEMORY_LIMIT_IN_BYTES=${CHROME_MEMORY_LIMIT_IN_BYTES}";'
	;ExecStart=/bin/mkdir /sys/fs/cgroup/memory/user.slice/chrome
	;ExecStop=/bin/rm /sys/fs/cgroup/memory/user.slice/chrome
	EnvironmentFile=-/etc/environment
	Type=oneshot

	#!/bin/sh

	exit_error()
	{
	echo "$1" >&2 && exit 1
	}


	valid_ip()
	{