363 lines
13 KiB
Markdown
363 lines
13 KiB
Markdown
# Beer Song
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Recite the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.
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Note that not all verses are identical.
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```text
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99 bottles of beer on the wall, 99 bottles of beer.
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Take one down and pass it around, 98 bottles of beer on the wall.
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98 bottles of beer on the wall, 98 bottles of beer.
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Take one down and pass it around, 97 bottles of beer on the wall.
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97 bottles of beer on the wall, 97 bottles of beer.
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Take one down and pass it around, 96 bottles of beer on the wall.
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96 bottles of beer on the wall, 96 bottles of beer.
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Take one down and pass it around, 95 bottles of beer on the wall.
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95 bottles of beer on the wall, 95 bottles of beer.
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Take one down and pass it around, 94 bottles of beer on the wall.
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94 bottles of beer on the wall, 94 bottles of beer.
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Take one down and pass it around, 93 bottles of beer on the wall.
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93 bottles of beer on the wall, 93 bottles of beer.
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Take one down and pass it around, 92 bottles of beer on the wall.
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92 bottles of beer on the wall, 92 bottles of beer.
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Take one down and pass it around, 91 bottles of beer on the wall.
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91 bottles of beer on the wall, 91 bottles of beer.
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Take one down and pass it around, 90 bottles of beer on the wall.
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90 bottles of beer on the wall, 90 bottles of beer.
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Take one down and pass it around, 89 bottles of beer on the wall.
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89 bottles of beer on the wall, 89 bottles of beer.
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Take one down and pass it around, 88 bottles of beer on the wall.
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88 bottles of beer on the wall, 88 bottles of beer.
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Take one down and pass it around, 87 bottles of beer on the wall.
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87 bottles of beer on the wall, 87 bottles of beer.
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Take one down and pass it around, 86 bottles of beer on the wall.
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86 bottles of beer on the wall, 86 bottles of beer.
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Take one down and pass it around, 85 bottles of beer on the wall.
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85 bottles of beer on the wall, 85 bottles of beer.
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Take one down and pass it around, 84 bottles of beer on the wall.
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84 bottles of beer on the wall, 84 bottles of beer.
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Take one down and pass it around, 83 bottles of beer on the wall.
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83 bottles of beer on the wall, 83 bottles of beer.
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Take one down and pass it around, 82 bottles of beer on the wall.
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82 bottles of beer on the wall, 82 bottles of beer.
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Take one down and pass it around, 81 bottles of beer on the wall.
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81 bottles of beer on the wall, 81 bottles of beer.
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Take one down and pass it around, 80 bottles of beer on the wall.
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80 bottles of beer on the wall, 80 bottles of beer.
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Take one down and pass it around, 79 bottles of beer on the wall.
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79 bottles of beer on the wall, 79 bottles of beer.
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Take one down and pass it around, 78 bottles of beer on the wall.
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78 bottles of beer on the wall, 78 bottles of beer.
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Take one down and pass it around, 77 bottles of beer on the wall.
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77 bottles of beer on the wall, 77 bottles of beer.
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Take one down and pass it around, 76 bottles of beer on the wall.
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76 bottles of beer on the wall, 76 bottles of beer.
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Take one down and pass it around, 75 bottles of beer on the wall.
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75 bottles of beer on the wall, 75 bottles of beer.
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Take one down and pass it around, 74 bottles of beer on the wall.
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74 bottles of beer on the wall, 74 bottles of beer.
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Take one down and pass it around, 73 bottles of beer on the wall.
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73 bottles of beer on the wall, 73 bottles of beer.
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Take one down and pass it around, 72 bottles of beer on the wall.
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72 bottles of beer on the wall, 72 bottles of beer.
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Take one down and pass it around, 71 bottles of beer on the wall.
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71 bottles of beer on the wall, 71 bottles of beer.
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Take one down and pass it around, 70 bottles of beer on the wall.
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70 bottles of beer on the wall, 70 bottles of beer.
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Take one down and pass it around, 69 bottles of beer on the wall.
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69 bottles of beer on the wall, 69 bottles of beer.
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Take one down and pass it around, 68 bottles of beer on the wall.
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68 bottles of beer on the wall, 68 bottles of beer.
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Take one down and pass it around, 67 bottles of beer on the wall.
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67 bottles of beer on the wall, 67 bottles of beer.
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Take one down and pass it around, 66 bottles of beer on the wall.
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66 bottles of beer on the wall, 66 bottles of beer.
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Take one down and pass it around, 65 bottles of beer on the wall.
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65 bottles of beer on the wall, 65 bottles of beer.
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Take one down and pass it around, 64 bottles of beer on the wall.
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64 bottles of beer on the wall, 64 bottles of beer.
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Take one down and pass it around, 63 bottles of beer on the wall.
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63 bottles of beer on the wall, 63 bottles of beer.
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Take one down and pass it around, 62 bottles of beer on the wall.
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62 bottles of beer on the wall, 62 bottles of beer.
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Take one down and pass it around, 61 bottles of beer on the wall.
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61 bottles of beer on the wall, 61 bottles of beer.
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Take one down and pass it around, 60 bottles of beer on the wall.
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60 bottles of beer on the wall, 60 bottles of beer.
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Take one down and pass it around, 59 bottles of beer on the wall.
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59 bottles of beer on the wall, 59 bottles of beer.
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Take one down and pass it around, 58 bottles of beer on the wall.
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58 bottles of beer on the wall, 58 bottles of beer.
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Take one down and pass it around, 57 bottles of beer on the wall.
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57 bottles of beer on the wall, 57 bottles of beer.
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Take one down and pass it around, 56 bottles of beer on the wall.
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56 bottles of beer on the wall, 56 bottles of beer.
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Take one down and pass it around, 55 bottles of beer on the wall.
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55 bottles of beer on the wall, 55 bottles of beer.
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Take one down and pass it around, 54 bottles of beer on the wall.
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54 bottles of beer on the wall, 54 bottles of beer.
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Take one down and pass it around, 53 bottles of beer on the wall.
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53 bottles of beer on the wall, 53 bottles of beer.
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Take one down and pass it around, 52 bottles of beer on the wall.
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52 bottles of beer on the wall, 52 bottles of beer.
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Take one down and pass it around, 51 bottles of beer on the wall.
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51 bottles of beer on the wall, 51 bottles of beer.
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Take one down and pass it around, 50 bottles of beer on the wall.
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50 bottles of beer on the wall, 50 bottles of beer.
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Take one down and pass it around, 49 bottles of beer on the wall.
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49 bottles of beer on the wall, 49 bottles of beer.
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Take one down and pass it around, 48 bottles of beer on the wall.
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48 bottles of beer on the wall, 48 bottles of beer.
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Take one down and pass it around, 47 bottles of beer on the wall.
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47 bottles of beer on the wall, 47 bottles of beer.
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Take one down and pass it around, 46 bottles of beer on the wall.
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46 bottles of beer on the wall, 46 bottles of beer.
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Take one down and pass it around, 45 bottles of beer on the wall.
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45 bottles of beer on the wall, 45 bottles of beer.
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Take one down and pass it around, 44 bottles of beer on the wall.
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44 bottles of beer on the wall, 44 bottles of beer.
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Take one down and pass it around, 43 bottles of beer on the wall.
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43 bottles of beer on the wall, 43 bottles of beer.
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Take one down and pass it around, 42 bottles of beer on the wall.
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42 bottles of beer on the wall, 42 bottles of beer.
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Take one down and pass it around, 41 bottles of beer on the wall.
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41 bottles of beer on the wall, 41 bottles of beer.
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Take one down and pass it around, 40 bottles of beer on the wall.
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40 bottles of beer on the wall, 40 bottles of beer.
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Take one down and pass it around, 39 bottles of beer on the wall.
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39 bottles of beer on the wall, 39 bottles of beer.
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Take one down and pass it around, 38 bottles of beer on the wall.
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38 bottles of beer on the wall, 38 bottles of beer.
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Take one down and pass it around, 37 bottles of beer on the wall.
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37 bottles of beer on the wall, 37 bottles of beer.
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Take one down and pass it around, 36 bottles of beer on the wall.
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36 bottles of beer on the wall, 36 bottles of beer.
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Take one down and pass it around, 35 bottles of beer on the wall.
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35 bottles of beer on the wall, 35 bottles of beer.
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Take one down and pass it around, 34 bottles of beer on the wall.
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34 bottles of beer on the wall, 34 bottles of beer.
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Take one down and pass it around, 33 bottles of beer on the wall.
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33 bottles of beer on the wall, 33 bottles of beer.
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Take one down and pass it around, 32 bottles of beer on the wall.
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32 bottles of beer on the wall, 32 bottles of beer.
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Take one down and pass it around, 31 bottles of beer on the wall.
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31 bottles of beer on the wall, 31 bottles of beer.
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Take one down and pass it around, 30 bottles of beer on the wall.
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30 bottles of beer on the wall, 30 bottles of beer.
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Take one down and pass it around, 29 bottles of beer on the wall.
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29 bottles of beer on the wall, 29 bottles of beer.
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Take one down and pass it around, 28 bottles of beer on the wall.
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28 bottles of beer on the wall, 28 bottles of beer.
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Take one down and pass it around, 27 bottles of beer on the wall.
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27 bottles of beer on the wall, 27 bottles of beer.
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Take one down and pass it around, 26 bottles of beer on the wall.
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26 bottles of beer on the wall, 26 bottles of beer.
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Take one down and pass it around, 25 bottles of beer on the wall.
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25 bottles of beer on the wall, 25 bottles of beer.
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Take one down and pass it around, 24 bottles of beer on the wall.
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24 bottles of beer on the wall, 24 bottles of beer.
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Take one down and pass it around, 23 bottles of beer on the wall.
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23 bottles of beer on the wall, 23 bottles of beer.
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Take one down and pass it around, 22 bottles of beer on the wall.
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22 bottles of beer on the wall, 22 bottles of beer.
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Take one down and pass it around, 21 bottles of beer on the wall.
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21 bottles of beer on the wall, 21 bottles of beer.
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Take one down and pass it around, 20 bottles of beer on the wall.
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20 bottles of beer on the wall, 20 bottles of beer.
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Take one down and pass it around, 19 bottles of beer on the wall.
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19 bottles of beer on the wall, 19 bottles of beer.
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Take one down and pass it around, 18 bottles of beer on the wall.
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18 bottles of beer on the wall, 18 bottles of beer.
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Take one down and pass it around, 17 bottles of beer on the wall.
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17 bottles of beer on the wall, 17 bottles of beer.
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Take one down and pass it around, 16 bottles of beer on the wall.
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16 bottles of beer on the wall, 16 bottles of beer.
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Take one down and pass it around, 15 bottles of beer on the wall.
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15 bottles of beer on the wall, 15 bottles of beer.
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Take one down and pass it around, 14 bottles of beer on the wall.
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14 bottles of beer on the wall, 14 bottles of beer.
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Take one down and pass it around, 13 bottles of beer on the wall.
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13 bottles of beer on the wall, 13 bottles of beer.
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Take one down and pass it around, 12 bottles of beer on the wall.
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12 bottles of beer on the wall, 12 bottles of beer.
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Take one down and pass it around, 11 bottles of beer on the wall.
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11 bottles of beer on the wall, 11 bottles of beer.
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Take one down and pass it around, 10 bottles of beer on the wall.
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10 bottles of beer on the wall, 10 bottles of beer.
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Take one down and pass it around, 9 bottles of beer on the wall.
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9 bottles of beer on the wall, 9 bottles of beer.
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Take one down and pass it around, 8 bottles of beer on the wall.
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8 bottles of beer on the wall, 8 bottles of beer.
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Take one down and pass it around, 7 bottles of beer on the wall.
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7 bottles of beer on the wall, 7 bottles of beer.
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Take one down and pass it around, 6 bottles of beer on the wall.
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6 bottles of beer on the wall, 6 bottles of beer.
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Take one down and pass it around, 5 bottles of beer on the wall.
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5 bottles of beer on the wall, 5 bottles of beer.
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Take one down and pass it around, 4 bottles of beer on the wall.
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4 bottles of beer on the wall, 4 bottles of beer.
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Take one down and pass it around, 3 bottles of beer on the wall.
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3 bottles of beer on the wall, 3 bottles of beer.
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Take one down and pass it around, 2 bottles of beer on the wall.
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2 bottles of beer on the wall, 2 bottles of beer.
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Take one down and pass it around, 1 bottle of beer on the wall.
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1 bottle of beer on the wall, 1 bottle of beer.
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Take it down and pass it around, no more bottles of beer on the wall.
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No more bottles of beer on the wall, no more bottles of beer.
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Go to the store and buy some more, 99 bottles of beer on the wall.
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```
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## For bonus points
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Did you get the tests passing and the code clean? If you want to, these
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are some additional things you could try:
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* Remove as much duplication as you possibly can.
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* Optimize for readability, even if it means introducing duplication.
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* If you've removed all the duplication, do you have a lot of
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conditionals? Try replacing the conditionals with polymorphism, if it
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applies in this language. How readable is it?
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Then please share your thoughts in a comment on the submission. Did this
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experiment make the code better? Worse? Did you learn anything from it?
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## Running tests
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Execute the tests with:
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```bash
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$ elixir beer_song_test.exs
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```
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### Pending tests
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In the test suites, all but the first test have been skipped.
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Once you get a test passing, you can unskip the next one by
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commenting out the relevant `@tag :pending` with a `#` symbol.
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For example:
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```elixir
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# @tag :pending
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test "shouting" do
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assert Bob.hey("WATCH OUT!") == "Whoa, chill out!"
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end
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```
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Or, you can enable all the tests by commenting out the
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`ExUnit.configure` line in the test suite.
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```elixir
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# ExUnit.configure exclude: :pending, trace: true
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```
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For more detailed information about the Elixir track, please
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see the [help page](http://exercism.io/languages/elixir).
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## Source
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Learn to Program by Chris Pine [http://pine.fm/LearnToProgram/?Chapter=06](http://pine.fm/LearnToProgram/?Chapter=06)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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