There are a couple ways to extract map tiles from the various archives - the most popular being MBTiles and PMTiles these days. The best way, though, is using tile-join from felt/tippecanoe:
tile-join -e dir/ input.pmtiles
This will output all tiles as a hierarchy in dir - dir/{z}/{x}/{y}.{ext}. When working with vector tiles, you might need to specify -pC (no tile compression). By default, tiles are compressed in the archive, but if you need the raw tiles in a directory, specifying this option will output the raw, uncompressed files.
Here are the headline features of Sierra, and my thoughts about them.
Siri
Don’t use it on the phone, won’t use it on the Mac. It would be nice if I could use it by typing, though.
Universal Clipboard
This seems like a massive security risk. It works via iCloud, so if someone (like my daughter) is using my iPad, then it will sync the clipboard to that, too. How do I turn it off?
I stumbled upon Convox a couple weeks ago, and found it pretty interesting. It’s led by a few people formerly from Heroku, and it certainly feels like it. A simple command-line interface to manage your applications on AWS, with almost no AWS-specific configuration required.
An example of how simple it is to deploy a new application:
$ cd ~/my-new-application
$ convox apps create
$ convox apps info
Name my-new-application
Status creating
Release (none)Processes (none)Endpoints
$ convox deploy
Deploying my-new-application
Creating tarball... OK
Uploading... 911 B / 911 B 100.00 % 0RUNNING: tar xz
...
... wait 5-10 minutes for the ELB to be registered ...
$ convox apps info
Name my-new-application
Status running
Release RIIDWNBBXKL
Processes web
Endpoints my-new-application-web-L7URZLD-XXXXXXX.ap-northeast-1.elb.amazonaws.com:80 (web)
Now, you can access your application at that ELB specified in the “Endpoints” section.
Elixir’s Getting Started guides go over the &Module.function/arity and &(...) anonymous function shorthand, but there are a couple neat tricks that are not immediately apparent about this shorthand.
In the beginning of 2015, I wrote a blog post about how my then-current programming language of choice (Ruby) was showing itself to not be as future-proof as I would have liked it to be.
A lot has changed since then, but a lot has remained the same.
First: I have started a few open-source Elixir projects:
Exfile -- a file upload handling, persistence, and processing library. Extracted from an image upload service I’m working on (also in Elixir).
The initial push to get me in to Elixir was indeed its performance, but that’s not what kept me. At the same time, I also tried learning Go and more recently, Rust has caught my attention.
In my 5-minute lightning talk, I talked about the basics of using Exfile. Exfile is a file upload persistence and processing library for Elixir with integrations for Ecto and Phoenix.
I’m a big Let’s Encrypt fan. They provide free SSL certificates for your web servers so you can protect the traffic from prying eyes. In fact, the connection between your web browser and my blog server is made private thanks to Let’s Encrypt.
Using Let’s Encrypt requires some setup and automation on your part if you want to use it in the AWS cloud, but AWS recently launched something called the AWS Certificate Manager or “ACM”. ACM takes care of issuing, renewing, and provisioning certificates for you – which is great because uploading SSL certificates to CloudFront and Elastic Load Balancers is not the most fun thing to do. I would pay for this, but Amazon has decided to give it to everyone for free. :-)
There’s a guide to writing browser acceptance tests for Phoenix. Acceptance tests are nice, but sometimes you want to have unit tests. This is very easy to do with your Elixir code, but what about your JavaScript code that lives inside your Phoenix application?
I couldn’t find a good guide on this, so I’ll go over what I have set up for one of my latest Phoenix projects.
Setup
First, install mocha if you haven’t already. I’ll be using mocha, but you can use whatever test runner you want to. You’ll also need babel-register -- this will allow you to use Babel while the tests are being run in Node.
In Ruby, there is a very handy class called StringIO. Basically, it allows you to treat a string like you would an IO object, such as an open file, etc. Very useful for in-memory “files” that you may not want to write to a temporary file.
In Elixir, there is a module called StringIO in the standard library. At first glance, these seem pretty similar:
