OpenSSL issues building Ruby 2.2.2 with ruby-install

Trying out chruby and ruby-install and installing Ruby 2.2.2 with ruby-install was giving be the error:

Setting the LDFLAGS env var solved this for me:

 

Alacritty Dracula Theme

Trying out Alacritty and can’t live without the Dracula theme. So here it is. Just added it to your alacritty.yml

 

Stupid coding mistakes

Made a really annoying mistake today while writing some code to delete data out of Redis.

The mistake was in the final method keep_keys. Every check to see if a key should be rejected I was adding an element to the flattened_keys array over and over again, causing my deletion to slow down over time. A simple change to memoize the keep keys made the process go from never finishing to, completing in a few seconds.

Clearer text in iTerm

For a while, and since moving to a 4k monitor, text has always looked a bit fuzzy when using iTerm. I just discovered that setting thin strokes to always be on has made a huge difference in the crispness of text.

Books of 2015

This year’s standout books were “The Dark Forest” which was the follow on from last year’s “The Three-Body Problem” and “I am Pilgrim”. “Brain Maker” was a real eye opener into the workings of the gut biome. Sadly most other books didn’t really grab me. I’ve also started keeping a track of books I ended up skimming through.

  • The Tiger that Isn’t (4/1/15 – Statistics)
  • It’s not all about me (24/1/15 – Psychology)
  • Just Fucking Ship (28/1/15 – Business)
  • Story of Your Life and Others (5/2/15 – Fiction)
  • Traction (10/2/15 – Business – Skimmed last 40%)
  • The Mom Test (22/2/15 – Business)
  • Stop Reading Self-Help Books (24/2/15 – Self-Help)
  • The Shell Collector (27/2/15 – Fiction)
  • JFDI (1/3/15 – Self-Help/Business)
  • Smartcuts – Audiobook (10/3/15 – Business)
  • Effective Javascript (Skimmed ~60%) (19/4/3015 – Computing)
  • Servers for Hackers (Skimmed ~ 90%) (20/4/2015 – Computing)
  • How Adam Smith Can Change Your Life (29/4/15 – Life)
  • Better than Before – Audiobook (15/5/15 – Psychology)
  • I Am Pilgrim (19/5/15 – Fiction)
  • The Zen Programmer (10/6/15 – Life)
  • Nikon D610 Experience (22/6/15 – Photography)
  • 31 Days to Overcome Your Fear of Shooting Street Photography (23/6/15)
  • How to Shoot Street Portraits (28/6/15 – Photography)
  • Adobe Lightroom 6 Training (28/6/15 – Photography)
  • The Flash Photography Field Guide (Skimmed ~50%) (2/7/15 – Photography)
  • The Street Photography Composition Manual (4/7/15 – Photography)
  • SEO 2016 (15/7/2015 – SEO)
  • Growing Rails Applications in Practice (17/7/2015 – Technology)
  • Make Love not Porn (3/8/2015 – Psychology)
  • Brain Maker (23/8/2015 – Health)
  • The Dark Forest (7/9/2015 – Fiction)
  • Total Recall (15/10/2015 – Autobiography)
  • Meta programming Ruby (21/11/2015)
  • No More Mr. Nice Guy (9/12/2015 – Self-help)
  • Redis in Action (Skimmed ~40%) (19/12/2015 – Technology)
  • Can you go? (18/12/2015 – Training)

Generating product recommendations in Spree using the Jaccard Index

Being able to recommend products to shoppers is a vital part of any online store. The “Customers Who Bought This Item Also Bought” section can lead to a lot of extra sales if done well. The Jaccard Index is a way of measuring similarity between items. Using some custom SQL we can extract the values we need:

With these values we can then calculate the affinity between sold products:

 

Generate a random email address in TextExpander with Applescript

Since my last post about generating random email addresses in TextExpander, I’ve move from using Ruby to Applescript to do so. Here is my script which essentially does the same thing.

 

Using Typeahead.js without Bloodhound

A great library for adding typeahead support to your site is Twitter’s Typeahead.js. Even better is the excellent Bloodhound suggestion engine which comes with it. Sometimes though if you’re dealing with a remote suggestion engine like Elasticsearch’s completion suggester you don’t need to run remote results once again through another suggestion engine. Bypassing Bloodhound is as simple as hooking your own source function into your Typeahead definition.