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Frank Versnel
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Renamed 'Week1', 'Week2' to 'Debugging1', 'Debugging2'.
Folders are renamed because they don't correspond with Weeks necessarily. Also added some more bugs.
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Week1/LECTURE.md renamed to Debugging1/LECTURE.md

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3. An observable failure.
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3. You learned how to use `console.log` to look for infections to lead you to
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the defect.
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4. But most of all: don't panic! :)
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<sup>1</sup> Zeller, Andreas - Why Programs Fail, Second Edition: A Guide to
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Systematic Debugging (2009)

‎Debugging1/MAKEME.md‎

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# Homework debugging 1
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Fix all the bugs in `Debugging1/homework`.

Week1/code_examples/example-bug1.js renamed to Debugging1/code_examples/example-bug1.js

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Week1/code_examples/example-bug2.js renamed to Debugging1/code_examples/example-bug2.js

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Week1/homework/bug1.js renamed to Debugging1/homework/bug1.js

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/*
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We want to know if our train arrives soon or not.
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If our train arrives within two hours we consider it to be soon.
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Normally hours wrap around from 24->0. For this assignment we're gonna
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assume hours don't wrap, so hour 24 + 1 becomes 25 and so on.
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Hint: try changing the variables `currentHour` and `trainArrivesHour`
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to find the defect.
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let trainArrivesHour = 9;
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if((trainArrivesHour - currentHour) < 3) {
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console.log("your train arrives soon");
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console.log("our train arrives soon");
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}

‎Debugging1/homework/bug2.js‎

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/*
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This programs should log all the top ten movies except the first three.
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Then it should log all top ten actors except the first three.
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*/
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let top10Movies = [
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'AI',
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'Shawshank Redemption',
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'Godfather',
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'Pulp Fiction',
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'Fight Club',
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'Forrest Gump',
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'Inception',
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'Goodfellas',
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'The Matrix',
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'Interstellar'];
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let top10Actors = [
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'Marlon Brando',
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'Jack Nickolson',
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'Robert De Niro',
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'Al Pacino',
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'Daniel Day-Lewis',
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'Dustin Hoffman',
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'Tom Hanks',
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'Anthony Hopkins',
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'Paul Newman',
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'Denzel Washington'];
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let index = 3;
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for (index; index < top10Movies.length; index++) {
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let movie = top10Movies[index];
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console.log('Top 10 movie: ' + movie);
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}
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for (index; index < top10Actors.length; index++) {
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let actor = top10Actors[index];
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console.log('Top 10 actor: ' + actor);
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}

‎Debugging1/homework/bug3.js‎

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/*
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For each hour our train hasn't arrived this program should log `train arriving
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in n hours`. Where n is the number of hours it takes for the train to arrive.
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Like:
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train arrives in 9 hours
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train arrives in 8 hours
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train arrives in 7 hours
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etc..
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*/
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let currentHour = 0;
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let trainArrivesHour = 9;
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for(let hour = currentHour; currentHour <= trainArrivesHour; hour++) {
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let trainArrivesIn = trainArrivesHour - hour;
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console.log("train arrives in " + trainArrivesIn + " hours");
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}

Week1/homework/bug2.js renamed to Debugging1/homework/bug4.js

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‎Debugging2/LECTURE.md‎

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# Debugging 2
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## Examples
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Work through some examples and/or homework assignments together with the
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students.
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## Creating variables
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Inlining is great but not when debugging.
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TODO Explain how to extract function call results into variables and why that is
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useful.
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## ESLint
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TODO
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## Simplifying input
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Often a program is big, and the defect not obvious. The program fails but you
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have no clue where to start because the program state is too big to reason
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about. Instead of frantically using `console.log` everywhere (which might
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sometimes work) we take one step back. We first simplify the input so that we
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get to a manageable state, something we can reason about. If our program still
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fails we can continue debugging. If it doesn't we need to pick different input.
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*TODO Write a buggy program that uses a lots of input and state.*
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- Maybe a sorting algorithm?
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- Something that uses a stack
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- Filtering algorithm (something that filters on a certain string)

Week1/homework/bug4.js renamed to Debugging2/homework/bug1.js

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