By Keith Yap

Things I've Learnt

Thomas Jefferson – The Art of Power

The life of Jefferson highlighted, amongst other things – the thirst for knowledge, the capacity to create, the love of family and friends, the hunger for accomplishment, the applause of the world, the marshaling of power, the bending of others… Continue Reading →

Remote connection to Raspberry Pi

Easy SSH when your computer and your PI are on the same network (wifi) Mac/Linux: Open the terminal Windows: Install Putty Ensure the pi is turned on and connected to network Find the ip address of the pi SSH into… Continue Reading →

PostgreSQL Beginner’s Cheat Sheet

Terminal commands: Launch PostgreSQL terminal – psql Copy table from one db to another – pg_dump -t table_name copyfrom_db_name | psql copyto_db_name   PSQL commands: List databases – \d List tables in current database – \dt List table structure – \d table_name List… Continue Reading →

Web Apps

Twitter sentiments – Looks up the 50 most recent tweets from any twitter user, classifies the sentiment of those tweets and outputs the result as a pie chart KS50 Finance – A simulated stock market portfolio tool, useful for learning the… Continue Reading →

Command line apps

The following are apps I’ve developed that currently only run from the command line. Many thanks to the excellent CS50 course for guidance with these. Caesar in C – Encrypts a user defined phrase using the caesar cypher method, and using a key… Continue Reading →

3 often forgotten rules of reporting dashboard design

A dashboard used to mean an array of physical instruments, arranged in front of an operator of some form of machine. The requirement for dashboards has evolved over time and they are now commonly used digitally by companies as a… Continue Reading →

Going Paperless

We’ve all heard this buzzword before, but what does it actually mean? What would a truly paperless working environment look like? To figure these questions out for myself, I decided to try it out first-hand. After a relatively smooth transition,… Continue Reading →

A Book Summary – Tuesdays with Morrie

A young man reconnects with his old university mentor after more than 15 years. Unfortunately, his mentor, Morrie, is slowly dying of a fatal, degenerative disease. Rather than lapsing into self pity however, Morrie chooses to spend what time he… Continue Reading →

Creating data rows from a summary table – Reverse Pivot

I needed to transform a table with data somewhat summarised (see below), back into a database, or data rows.   Thanks to the internet, I uncovered this little trick. Press ALT + D + P to bring up the PivotChart… Continue Reading →

Rent vs Buy Calculator

A simple calculator to determine if you are financially better off to rent or buy a property. Feedback welcomed in the comments below. Notes: this calculator has been tailored to the Australian market (eg. rent is expressed in weeks) there… Continue Reading →

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