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Add House Exercise (#647)
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‎config.json

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"conditionals"
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]
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},
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{
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"slug": "house",
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"name": "House",
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"uuid": "76a067bc-5bc3-47de-a539-69eb6c80473a",
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"practices": [],
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"prerequisites": [],
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"difficulty": 3
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},
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{
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"slug": "scale-generator",
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"name": "Scale Generator",

‎exercises/practice/house/.docs/instructions.md

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# Instructions
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Recite the nursery rhyme 'This is the House that Jack Built'.
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> The process of placing a phrase of clause within another phrase of clause is called embedding.
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> It is through the processes of recursion and embedding that we are able to take a finite number of forms (words and phrases) and construct an infinite number of expressions.
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> Furthermore, embedding also allows us to construct an infinitely long structure, in theory anyway.
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- [papyr.com][papyr]
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The nursery rhyme reads as follows:
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```text
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This is the house that Jack built.
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This is the malt
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that lay in the house that Jack built.
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This is the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the maiden all forlorn
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that milked the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the man all tattered and torn
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that kissed the maiden all forlorn
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that milked the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the priest all shaven and shorn
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that married the man all tattered and torn
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that kissed the maiden all forlorn
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that milked the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the rooster that crowed in the morn
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that woke the priest all shaven and shorn
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that married the man all tattered and torn
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that kissed the maiden all forlorn
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that milked the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the farmer sowing his corn
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that kept the rooster that crowed in the morn
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that woke the priest all shaven and shorn
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that married the man all tattered and torn
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that kissed the maiden all forlorn
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that milked the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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This is the horse and the hound and the horn
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that belonged to the farmer sowing his corn
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that kept the rooster that crowed in the morn
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that woke the priest all shaven and shorn
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that married the man all tattered and torn
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that kissed the maiden all forlorn
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that milked the cow with the crumpled horn
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that tossed the dog
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that worried the cat
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that killed the rat
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that ate the malt
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that lay in the house that Jack built.
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```
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[papyr]: https://papyr.com/hypertextbooks/grammar/ph_noun.htm

‎exercises/practice/house/.meta/config.json

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{
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"authors": [
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"tomasnorre"
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],
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"files": {
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"solution": [
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"House.php"
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],
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"test": [
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"HouseTest.php"
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],
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"example": [
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".meta/example.php"
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]
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},
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"blurb": "Output the nursery rhyme 'This is the House that Jack Built'.",
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"source": "British nursery rhyme",
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"source_url": "https://en.wikipedia.org/wiki/This_Is_The_House_That_Jack_Built"
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}

‎exercises/practice/house/.meta/example.php

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<?php
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declare(strict_types=1);
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class House
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{
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private const OBJECTS = [
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'house',
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'malt',
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'rat',
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'cat',
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'dog',
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'cow with the crumpled horn',
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'maiden all forlorn',
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'man all tattered and torn',
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'priest all shaven and shorn',
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'rooster that crowed in the morn',
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'farmer sowing his corn',
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'horse and the hound and the horn',
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];
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private const ACTIONS = [
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'Jack built',
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'lay in',
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'ate',
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'killed',
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'worried',
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'tossed',
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'milked',
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'kissed',
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'married',
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'woke',
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'kept',
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'belonged to',
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];
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public function verse(int $verseNumber): array
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{
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$lines = [];
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$totalLines = $verseNumber;
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$itemIndex = $verseNumber - 1;
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for ($lineNumber = 1; $lineNumber <= $totalLines; $lineNumber++) {
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$lineText = '';
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if ($lineNumber === 1) {
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$lineText .= 'This is';
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} else {
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$lineText .= 'that ' . self::ACTIONS[$itemIndex];
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$itemIndex--;
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}
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$lineText .= ' the ' . self::OBJECTS[$itemIndex];
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if ($lineNumber === $totalLines) {
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$lineText .= ' that ' . self::ACTIONS[$itemIndex] . '.';
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}
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$lines[] = $lineText;
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}
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return $lines;
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}
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public function verses(int $start, int $end): array
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{
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$lines = [];
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for ($i = $start; $i <= $end; $i++) {
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$verseLines = $this->verse($i);
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$lines = array_merge($lines, $verseLines);
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if ($i < $end) {
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$lines[] = '';
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}
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}
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return $lines;
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}
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}

‎exercises/practice/house/.meta/tests.toml

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# This is an auto-generated file.
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#
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# Regenerating this file via `configlet sync` will:
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# - Recreate every `description` key/value pair
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# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
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# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
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# - Preserve any other key/value pair
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#
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# As user-added comments (using the # character) will be removed when this file
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# is regenerated, comments can be added via a `comment` key.
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[28a540ff-f765-4348-9d57-ae33f25f41f2]
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description = "verse one - the house that jack built"
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[ebc825ac-6e2b-4a5e-9afd-95732191c8da]
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description = "verse two - the malt that lay"
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[1ed8bb0f-edb8-4bd1-b6d4-b64754fe4a60]
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description = "verse three - the rat that ate"
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[64b0954e-8b7d-4d14-aad0-d3f6ce297a30]
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description = "verse four - the cat that killed"
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[1e8d56bc-fe31-424d-9084-61e6111d2c82]
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description = "verse five - the dog that worried"
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[6312dc6f-ab0a-40c9-8a55-8d4e582beac4]
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description = "verse six - the cow with the crumpled horn"
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[68f76d18-6e19-4692-819c-5ff6a7f92feb]
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description = "verse seven - the maiden all forlorn"
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[73872564-2004-4071-b51d-2e4326096747]
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description = "verse eight - the man all tattered and torn"
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[0d53d743-66cb-4351-a173-82702f3338c9]
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description = "verse nine - the priest all shaven and shorn"
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[452f24dc-8fd7-4a82-be1a-3b4839cfeb41]
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description = "verse 10 - the rooster that crowed in the morn"
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[97176f20-2dd3-4646-ac72-cffced91ea26]
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description = "verse 11 - the farmer sowing his corn"
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[09824c29-6aad-4dcd-ac98-f61374a6a8b7]
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description = "verse 12 - the horse and the hound and the horn"
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[d2b980d3-7851-49e1-97ab-1524515ec200]
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description = "multiple verses"
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[0311d1d0-e085-4f23-8ae7-92406fb3e803]
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description = "full rhyme"

‎exercises/practice/house/House.php

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<?php
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/*
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* By adding type hints and enabling strict type checking, code can become
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* easier to read, self-documenting and reduce the number of potential bugs.
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* By default, type declarations are non-strict, which means they will attempt
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* to change the original type to match the type specified by the
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* type-declaration.
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*
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* In other words, if you pass a string to a function requiring a float,
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* it will attempt to convert the string value to a float.
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*
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* To enable strict mode, a single declare directive must be placed at the top
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* of the file.
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* This means that the strictness of typing is configured on a per-file basis.
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* This directive not only affects the type declarations of parameters, but also
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* a function's return type.
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*
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* For more info review the Concept on strict type checking in the PHP track
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* <link>.
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*
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* To disable strict typing, comment out the directive below.
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*/
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declare(strict_types=1);
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class House
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{
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public function verse(int $verseNumber): array
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{
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throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
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}
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public function verses(int $start, int $end): array
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{
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throw new \BadMethodCallException(sprintf('Implement the %s method', __FUNCTION__));
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}
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}

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