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@logaretm
logaretm / sw.js
Created February 25, 2020 20:46
Caching GraphQL responses with Service Workers
const QUERY_CACHE_KEY = 'CACHE_V_0';
const GRAPHQL_URL = 'https://example.com/graphql';
self.addEventListener('fetch', e => {
if (isGraphql(e.request)) {
handleGraphQL(e);
}
});
@wojteklu
wojteklu / clean_code.md
Last active May 21, 2024 14:31
Summary of 'Clean code' by Robert C. Martin

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.


General rules

  1. Follow standard conventions.
  2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
  3. Boy scout rule. Leave the campground cleaner than you found it.
  4. Always find root cause. Always look for the root cause of a problem.

Design rules

@haroldtreen
haroldtreen / promise-test.js
Last active August 25, 2023 13:59
Testing promise rejection with Mocha
const { assert } = require('chai');
function isError(e) {
if (typeof e === 'string') {
return Promise.reject(new Error(e));
}
return Promise.resolve(e);
}
@kennwhite
kennwhite / 1944_OSS_Simple_Sabotage_Field_Manual.md
Last active May 17, 2024 09:58
1944 OSS Simple Sabotage Field Manual
@mattiaslundberg
mattiaslundberg / Ansible Let's Encrypt Nginx setup
Last active April 19, 2024 16:03
Let's Encrypt Nginx setup with Ansible
Ansible playbook to setup HTTPS using Let's encrypt on nginx.
The Ansible playbook installs everything needed to serve static files from a nginx server over HTTPS.
The server pass A rating on [SSL Labs](https://www.ssllabs.com/).
To use:
1. Install [Ansible](https://www.ansible.com/)
2. Setup an Ubuntu 16.04 server accessible over ssh
3. Create `/etc/ansible/hosts` according to template below and change example.com to your domain
4. Copy the rest of the files to an empty directory (`playbook.yml` in the root of that folder and the rest in the `templates` subfolder)
@benhoyt
benhoyt / birthday_probability.py
Created August 5, 2016 18:27
"Birthday problem" calculator in Python
"""Calculate the probability of generating a duplicate random number after
generating "n" random numbers in the range "d".
Usage: python birthday_probability.py n [d=365]
Each value can either be an integer directly, or in the format "2**x", where
x is the number of bits in the value.
For example, to calculate the probability that two people will have the same
birthday in a room with 23 people:
@harto
harto / before.js
Created April 20, 2016 17:33
Mocha before() & beforeEach() execution order with nested describe()
'use strict';
describe('mocha before hooks', function () {
before(() => console.log('*** top-level before()'));
beforeEach(() => console.log('*** top-level beforeEach()'));
describe('nesting', function () {
before(() => console.log('*** nested before()'));
beforeEach(() => console.log('*** nested beforeEach()'));
it('is a nested spec', () => true);
});
@martijnvermaat
martijnvermaat / ssh-agent-forwarding-screen.md
Created December 21, 2013 15:06
SSH agent forwarding and screen

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.

@goldsmith
goldsmith / python_mavericks_guide.sh
Last active June 3, 2020 12:18
When I upgraded my Mac to OS X Mavericks, a lot of utilities (like Python, virtualenv, Xcode) broke, and it was pretty stressful trying to get it all set back up. Hopefully this guide can spare you some of that pain.Note: I'm by no means a Linux or Mac expert, so please fork and let me know if anything is redundant, incorrect, or missing!
# A guide to prevent pain and suffering while upgrading to OS X Mavericks
# This will vary greatly depending on system set up, so read the instructions carefully
# Back up Virtulenvs
####################
# Very important!
# For each virtualenv you have, run "pip freeze > requirements.txt" while in the activated virtualenv
# in order to prevent loss of dependencies during the upgrade.
@jamarparris
jamarparris / Generate Mongo Object ID in PostGres
Last active March 20, 2024 00:04
Create ObjectIds in PostGres following the MongoDB semantics. Very similar to the Instagram approach linked below.http://docs.mongodb.org/manual/reference/object-id/http://instagram-engineering.tumblr.com/post/10853187575/sharding-ids-at-instagram
The MIT License (MIT)
Copyright (c) 2013 Jamar Parris
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE S