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Tyler Barker

@tylerbarker.com

308 followers 342 following 46 posts

Dev in Aus 🇦🇺 Building with #ElixirLang tylerbarker.com

Posts Replies Media

Tyler Barker @tylerbarker.com · 19/07/2025

The real reason to get a split keyboard 🧠

An office desk with two KRK studio monitors, a MacBook Pro and external display, a midi piano keyboard and split ergo keyboard, with Reason open for music making.

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Tyler Barker @tylerbarker.com · 18/02/2025

Maybe the most amazing thing about Elixir to me pattern matching on binaries. Parsing a WAV file is almost as simple as writing down the file spec verbatim - look at this! #ElixirLang

Plaintext formatted to read as a table, outlining the WAV file specification. It reads:
```
WAV File Format Structure
------------------------

Position | Sample Value | Description
----------|-------------|-------------
1-4 | "RIFF" | Marks the file as a riff file. Characters are each 1 byte long.
5-8 | File size | Size of the overall file - 8 bytes, in bytes (32-bit integer).
| (integer) | Typically, you'd fill this in after creation.
9-12 | "WAVE" | File Type Header. For our purposes, it always equals "WAVE".
13-16 | "fmt " | Format chunk marker. Includes trailing null
17-20 | 16 | Length of format data as listed above
21-22 | 1 | Type of format (1 is PCM) - 2 byte integer
23-24 | 2 | Number of Channels - 2 byte integer
25-28 | 44100 | Sample Rate - 32 bit integer. Common values are 44100 (CD),
| | 48000 (DAT). Sample Rate = Number of Samples per second, or Hertz.
29-32 | 176400 | (Sample Rate * BitsPerSample * Channels) / 8
33-34 | 4 | (BitsPerSample * Channels) / 8
| | 1 - 8 bit mono
| | 2 - 8 bit stereo/16 bit mono
| | 4 - 16 bit stereo
35-36 | 16 | Bits per sample
37-40 | "data" | "data" chunk header. Marks the beginning of the data section.
41-44 | File size | Size of the data section.
| (data) |

Note: Sample values shown are for a 16-bit stereo source.
```

An Elixir code sample that showcases the power of pattern matching binaries as bitstrings - in this case for a WAV audio file. The code reads:
```
<<"RIFF",
chunk_size::little-size(32),
"WAVE",
"fmt ",
subchunk1_size::little-size(32),
audio_format::little-size(16),
num_channels::little-size(16),
sample_rate::little-size(32),
byte_rate::little-size(32),
block_align::little-size(16),
bits_per_sample::little-size(16),
data_chunk::binary>> = File.read!("./banger.wav")
```

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Tyler Barker @tylerbarker.com · 08/02/2025

Saving this for the dozens of us in the NBA <> Elixir Venn diagram when that day comes.

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Tyler Barker @tylerbarker.com · 14/01/2025

Ever wanted your LiveView components to sparkle? Use this hook: gist.github.com/tylerbarker/... #ElixirLang #LiveView

0110

Tyler Barker @tylerbarker.com · 26/11/2024

Cloak is rad! I'm rebuilding my wife's website which handles some sensitive data. Last I checked, cloak_ecto doesn't support SQLite - but it didn't take much to do it myself 🔒 github.com/danielberkom...

Ecto schema with binary values, marked encrypted fields.

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