mitchellh

I get asked pretty regularly what my opinion is on merge commits vs rebasing vs squashing. I've typed up this response so many times that I've decided to just put it in a gist so I can reference it whenever it comes up again.

I use merge, squash, rebase all situationally. I believe they all have their merits but their usage depends on the context. I think anyone who says any particular strategy is the right answer 100% of the time is wrong, but I think there is considerable acceptable leeway in when you use each. What follows is my personal and professional opinion:

dvlden

This is my personal list of functions that I wrote for converting mov files to mp4!

Command Flags

Flag	Options	Description
-codec:a	libfaac, libfdk_aac, libvorbis	Audio Codec
-quality	best, good, realtime	Video Quality
-b:a	128k, 192k, 256k, 320k	Audio Bitrate
-codec:v	mpeg4, libx264, libvpx-vp9	Video Codec

birme

const request = require('request');

const DATA_API = 'https://data.example.com/api';
const DATA_API_KEY = process.env.API_KEY;

exports.search = function(event, context, callback) {
  const targets = [ 'ID1', 'ID2', 'ID3' ];
  callback(null, targets);
};

nepsilon

How to kill a frozen SSH session?

No need to close your terminal tab anymore (or furiously hitting your keyboard) when your SSH session frozen. SSH has an escape sequence that will let you properly close the connection and give you back the prompt. In order, type: Return, ~, .

That’s it! This will send an escape sequence to your local SSH socket and close the connection.

SSH has more escape sequences under the hood, hit Return ~ ? to display the full list:

nepsilon

Simple cache busting with Nginx

You update your app.js or styles.css, but have a caching of 30 days and none of the clients will get the latest version? 😟

While the best would be to use a build mechanism to generate new filenames on the server, here is how to ensure clients get your last updates:

1. Change the name of the files in the HTML, for example styles.css to styles.123.css

2. Add this cache busting snippet in your nginx conf:

reggi

How to setup AWS lambda function to talk to the internet and VPC

I'm going to walk you through the steps for setting up a AWS Lambda to talk to the internet and a VPC. Let's dive in.

So it might be really unintuitive at first but lambda functions have three states.

1. No VPC, where it can talk openly to the web, but can't talk to any of your AWS services.
2. VPC, the default setting where the lambda function can talk to your AWS services but can't talk to the web.
3. VPC with NAT, The best of both worlds, AWS services and web.

schickling

docker-machine import/export

Script to import and export docker-machine configurations to sync between hosts/collaborators

Export (on host A)

$ docker-machine ls
NAME       ACTIVE   DRIVER         STATE     URL                            SWARM   DOCKER    ERRORS
dev        -        digitalocean   Running   tcp://example.com:2376                 v1.10.1

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

florentb

# Clear all cache
$ varnishadm "ban req.url ~ /"
# or
$ varnishadm "ban req.http.host ~ www.mydomain.com"

# Purge only CSS
$ varnishadm "ban req.http.host ~ www.mydomain.com && req.url ~ .css"

jaydenseric

Video conversion with FFmpeg

Install

On mac:

1. Download the latest release.
2. Extract the binary and place it in /usr/local/bin.

Command basics