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Chore - Intro code examples #8

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c254c98
Add `Loop` runnable code as reference
hhandoko Aug 31, 2017
a960e27
Add links to source code for reference
hhandoko Aug 31, 2017
4220c83
Fix code example to utilise `max` parameter
hhandoko Aug 31, 2017
fbfb76f
Split code into `exercises` and `references`
hhandoko Aug 31, 2017
a577375
Break long paragraph in intro to make it easier to read
hhandoko Sep 5, 2017
375b0cf
Replace ordered list with regular numbering instead of MD auto-parsed…
hhandoko Sep 13, 2017
8017189
Replace unordered list symbol to `-` for consistency
hhandoko Sep 13, 2017
37e0f47
Fix MD rendering for source code links
hhandoko Sep 13, 2017
b0d1290
Simplify and replace link into footnote-style
hhandoko Sep 13, 2017
9803b09
Revert and add air quotes ;)
hhandoko Sep 13, 2017
f70c2f7
Add generated diff output
hhandoko Sep 13, 2017
9e8a620
Scrub filesystem path
hhandoko Sep 13, 2017
e776285
Add links to diff preview
hhandoko Sep 13, 2017
74e41e2
Fix link to `Loop1.java` file
hhandoko Sep 13, 2017
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Fix MD rendering for source code links
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@hhandoko
hhandoko committed Sep 13, 2017
commit 37e0f479795ea0a05471f728d3a723ddbb7a77c6
48 changes: 8 additions & 40 deletions exercises/intro/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -54,11 +54,7 @@ public class Loop {
}
```

<center>
<small>
_(source: [Loop1.java](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/java/Loop1.java))_
</small>
</center>
_<center><small>(source: [Loop1.java](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/java/Loop1.java))</small></center>_
<br>

This program is, on purpose, easy enough to understand. Consider however, that
Expand Down Expand Up @@ -110,11 +106,7 @@ object Main extends App { // 1.
}
```

<center>
<small>
_(source: [Loop2.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop2.scala))_
</small>
</center>
_<center><small>(source: [Loop2.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop2.scala))</small></center>_
<br>

First you notice that Scala is less verbose: no semicolons needed, no `public
Expand Down Expand Up @@ -210,11 +202,7 @@ def sum(xs: List[Int]): Int = {
val result = sum(square(filterEven(iterate(10))))
```

<center>
<small>
_(source: [Loop3.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop3.scala))_
</small>
</center>
_<center><small>(source: [Loop3.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop3.scala))</small></center>_
<br>

Wow! The number of lines of code just exploded and we introduced a lot of
Expand Down Expand Up @@ -357,11 +345,7 @@ def sum(xs: List[Int]): Int = {
}
```

<center>
<small>
_(source: [Loop4.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop4.scala))_
</small>
</center>
_<center><small>(source: [Loop4.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop4.scala))</small></center>_
<br>

Here we pattern match on a list instead of integer. Note how we used the same
Expand Down Expand Up @@ -410,11 +394,7 @@ def square(xs: List[Int]): List[Int] =
flatMap(xs, x => List(x * x))
```

<center>
<small>
_(source: [Loop5.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop5.scala))_
</small>
</center>
_<center><small>(source: [Loop5.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop5.scala))_</small></center>
<br>

1. `flatMap` takes function `f` as its second argument;
Expand Down Expand Up @@ -466,11 +446,7 @@ def sum(xs: List[Int]): Int =
foldLeft(xs)(0)((acc, x) => acc + x)
```

<center>
<small>
_(source: [Loop6.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop6.scala))_
</small>
</center>
_<center><small>(source: [Loop6.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop6.scala))</small></center>_
<br>

1. `foldLeft[A, R]` is parametrized on type of the input list `A` as well as
Expand Down Expand Up @@ -516,11 +492,7 @@ def sumOfEvenSquares(max: Int): Int = {
}
```

<center>
<small>
_(source: [Loop7.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop7.scala))_
</small>
</center>
_<center><small>(source: [Loop7.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop7.scala))</small></center>_
<br>

Here, `square` really does only what it says and doesn't mess with lists
Expand Down Expand Up @@ -548,11 +520,7 @@ def sumOfEvenSquares(max: Int): Int = {
}
```

<center>
<small>
_(source: [Loop8.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop8.scala))_
</small>
</center>
_<center><small>(source: [Loop8.scala](https://github.com/SingaporeScalaProgrammers/scala-workshop/blob/master/references/intro/src/main/scala/Loop8.scala))</small></center>_
<br>

We use `1 to 10` directly instead of our own `iterate` function. `filter`,
Expand Down