Aleksei Tcelishchev casualuser

Getting an Alpine shell

Often usefull for in-cluster debugging.

$ kubectl run --generator=run-pod/v1 --image=alpine:3.5 -it alpine-shell -- /bin/sh

detach (without killing the container):

Available Public Wildcard DNS Domains pointing to localhost (127.0.0.1)

It turns out that some kind hearted people already set up wildcard domains for you already. You can use any domain below and/or any subdomain of these and they currently resolve to 127.0.0.1 but could switch at any time to resolve somewhere else. Here's the list of ones I know about. Let me know if there are more!

localhost - It will always works. Do you know why? I hope so.
[*.]fuf.me - Managed by @fidian; it will always point to localhost for IPv4 and IPv6
[*.]fbi.com - 👏 👏 👏 👏 👏
[*.]localtest.me
[*.]127-0-0-1.org.uk
[*.]vcap.me

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

	SWIG/_m2crypto.i:30: Error: Unable to find 'openssl/opensslv.h'

	SWIG/_m2crypto.i:33: Error: Unable to find 'openssl/safestack.h'

	SWIG/_evp.i:12: Error: Unable to find 'openssl/opensslconf.h'

	SWIG/_ec.i:7: Error: Unable to find 'openssl/opensslconf.h'

	error: command 'swig' failed with exit status 1

	def get_count(q):
	count_q = q.statement.with_only_columns([func.count()]).order_by(None)
	count = q.session.execute(count_q).scalar()
	return count

	q = session.query(TestModel).filter(...).order_by(...)

	# Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ...
	print q.count()

	#!/usr/bin/env bash

	# A helper for kind to create and delete clusters with untrusted local registry.
	# Based on https://kind.sigs.k8s.io/docs/user/local-registry/
	#
	# Note: kind 0.10.0

	# Settings for kind cluster
	CLUSTER_NAME="kube-19"
	KIND_NODE_IMAGE="kindest/node:v1.19.7"

	"""Comparison of fetching web pages sequentially vs. asynchronously

	Requirements: Python 3.5+, Requests, aiohttp, cchardet

	For a walkthrough see this blog post:
	http://mahugh.com/2017/05/23/http-requests-asyncio-aiohttp-vs-requests/
	"""
	import asyncio
	from timeit import default_timer

	import re

	# http://stackoverflow.com/a/13752628/6762004
	RE_EMOJI = re.compile('[\U00010000-\U0010ffff]', flags=re.UNICODE)

	def strip_emoji(text):
	return RE_EMOJI.sub(r'', text)

	print(strip_emoji('🙄🤔'))

	var mediaJSON = { "categories" : [ { "name" : "Movies",
	"videos" : [
	{ "description" : "Big Buck Bunny tells the story of a giant rabbit with a heart bigger than himself. When one sunny day three rodents rudely harass him, something snaps... and the rabbit ain't no bunny anymore! In the typical cartoon tradition he prepares the nasty rodents a comical revenge.\n\nLicensed under the Creative Commons Attribution license\nhttp://www.bigbuckbunny.org",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" ],
	"subtitle" : "By Blender Foundation",
	"thumb" : "images/BigBuckBunny.jpg",
	"title" : "Big Buck Bunny"
	},
	{ "description" : "The first Blender Open Movie from 2006",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4" ],

Aleksei Tcelishchev casualuser

Getting an Alpine shell

Available Public Wildcard DNS Domains pointing to localhost (127.0.0.1)

Better local require() paths for Node.js

Problem

Possible solutions