Have you ever wondered what is the fastest way to get Array with unique items?

I've got [Pine64 Single Board Computer](https://www.pine64.org/?product=pine-a64-lts) (the first generation) and it has not so low memory, compared to Raspberry Pi, mine has 2GB. But still, when having there [Prometheus.io](https://prometheus.io), [Nextcloud](https://nextcloud.com/) and [rTorrent](https://github.com/rakshasa/rtorrent/wiki/Config-Guide) (with ruTorrent for web interface), plus samba share, it suddenly isn't that much, those 2GB of memory.

This is short example about Observables and how they can be really evil. Fortunately we have a hero called [Object.freeze(obj)](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze?redirectlocale=en-US&redirectslug=JavaScript%2FReference%2FGlobal_Objects%2FObject%2Ffreeze).

TLDR; Think about when Web Workers make sense and when not. It's tempting to run something on the background, but not always. This is the story of what I did wrong.

After more than one year of struggle with Micro M3D printer I decided to buy something bigger, faster, and more reliable. So why not original Prusa i3 MK2, which was on top of the chart (which I can not find anymore) while M3D was at the bottom.

I want to track and graph everything, which includes power consumption in my flat. But checking and regularly values and writing them down in spreadsheet is tiresome. Then I found [this guide](http://www.thalin.se/2015/05/power-meter-pulse-logger-with-esp8266.html) and after some modifications I've managed to collect actual power consumption, send it to Prometheus and see graphs in Grafana.

[SMPlayer](http://www.smplayer.eu/) is powerful GUI for mplayer and for some time form mpv too. It already has UI for downloading subtitles from opensubtiles.org, but that's all you can do with online subtitles. Fortunately [mpv](https://mpv.io) comes to rescue with it's support for .lua scripts.

LIFX bulbs are great, but when you just need to turn them on, off or just change brightness, it can be not very comfortable, to do this simple task by app. So I decided to create much simpler way to do this. And then I came across NodeMCU, small development board similar to Arduino with integrated Wi-Fi, with cost of about $5.

Project LIFX: The Light Bulb Reinvented has collected in november 2012 more than $1.3 million (goal set to 100 thousand). It's goal was to manufacture RGB-W LED bulbs LIFX, which you can control via WiFi. Author promised, they'll be ready in march 2013, but path to the final product was more difficult than expected. My 4 bulbs arrived in february 2014, so I've had to wait 15 months, but it was worth it.

Problem: When ajax request has cache off it always creates request with timestamp e.g. `_=1456134256000`, and as it is get parameter, views are called and Drupal cache is not hit. And when cache is on, request is made without timestamp, and browser returns data from it's cache, so it doesn't hit server. What I needed is that script gets past browser cache, but hits Drupal cache.