Alex Jahraus fanaugen

Scenario

You're developing a system to analyze transactions for potential fraud.

You have a list of transactions, each with a variety of attributes like amount, currency, status, and a fraud score.

Your goal is to calculate total amounts for different currencies only for transactions flagged non clean.

You shall refactor ONLY the analyze_transactions method to be the shortest possible, without changing any other pieces of the code.

Ruby on Ice 2019

Teach by Learning, Lead by Teaching

by Betsy Haibel

ideas from 📕 Pedagogy of the Oppressed by Paulo Freire

Motivations for learning in tech and engineering:

Must-see locations in Leipzig

It depends, of course, on whether you’re looking for nature, culture, history, art, music, or night life, but here are some things to check out:

Obviously, city center, Augustusplatz, with its new Mein Building of Leipzig University (that looks like a church, because it was built where the GDR had destroyed a centuries-old church)
Thomaskirche, if you want to listen to organ music, or see the final resting ground of the mortal remains of J.S. Bach
Moritzbastei – just behind the city skyscraper that is visible from anywhere. This is an underground bar / concert location. Literally underground, with nice round vaults
The area around Markt is also worth walking around
Clara-Zetkin-Park (esp. area around Sachsenbrücke)

VIM Link dump

All these resources have actually helped me.

Learning VIM in 2014 – excellent blog post series, still not outdated. But, of course, you can google "learn VIM in 2019" instead.
VIM articles on the Giant Robots blog – super helpful tips and tricks, especially around the integration of VIM with TMUX and working with Ruby files in VIM
VIM Awesome – the catalogue of VIM plugins
Tim Pope – this guy is the Pope of VIM; he’s written a shit ton of plugins, most of which are pure gold.
VIM Casts – archived video series, a little old, but fantastic for learning the fundamental principles of VIM (and even ancient history behind its predecessor VI) – for instance, you can learn nice trivia such as why grep is called grep (this will make you the center

🚚 this content has moved

📻 My Favourite Podcasts

developer podcasts I’ve listened to

Some of these I still subscribe to, others are no longer in my subsctiption list to make time for non-dev related podcasts

Ruby Book Club [RSS] [discontinued] – Nadia Odunayo and Saron Yitbarek read an hour of a Ruby book each week, then summarise and discuss what they learned
Giant Robots Smashing Into Other Giant Robots by thoughtbot [RSS]

echo "Please pick up the following from the store: $groceries[0]";

This isn't going to work by the way: inserting a variable's value into a string "like $x this" only works with a simple variable such as $x – for array elements you have two other options:

String concatenation:

echo "buy ".$groceries[0]." at the store";

save in a variable beforehand:

	# for each git alias of the form XX, create fish abbreviation gXX
	function git_alias --desc "Add a git abbreviation"
	abbr -a g$argv[1] git $argv[2]
	end
	for _alias in (git config --global --get-regexp '^alias\.*' \| sed s/alias.//)
	git_alias (string split -m1 ' ' "$_alias")
	end

	function steamroller(arr) {

	for (var i = 0; i < arr.length; i++) {
	if(Array.isArray(arr[i])) {
	// recurse: replace this array with all its elements
	// for instance, if arr is [1, [2, 3], 4]
	// then we want to return [1, 2, 3, 4]
	var left = arr.slice(0, i);
	var right = arr.slice(i + 1);
	return steamroller(

	#!/bin/bash

	# Run `rake -D` and format the task descriptions as a
	# GitHub-Markdown table (for our Wiki)
	# Write the output to tasks.md

	touch tasks.md
	echo '<dl>' > tasks.md

	bundle exec rake -D \|