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eferim's solution

to Pig Latin in the Delphi Pascal Track

Published at Nov 03 2018 · 0 comments
Instructions
Test suite
Solution

Note:

This exercise has changed since this solution was written.

Implement a program that translates from English to Pig Latin.

Pig Latin is a made-up children's language that's intended to be confusing. It obeys a few simple rules (below), but when it's spoken quickly it's really difficult for non-children (and non-native speakers) to understand.

  • Rule 1: If a word begins with a vowel sound, add an "ay" sound to the end of the word. Please note that "xr" and "yt" at the beginning of a word make vowel sounds (e.g. "xray" -> "xrayay", "yttria" -> "yttriaay").
  • Rule 2: If a word begins with a consonant sound, move it to the end of the word and then add an "ay" sound to the end of the word. Consonant sounds can be made up of multiple consonants, a.k.a. a consonant cluster (e.g. "chair" -> "airchay").
  • Rule 3: If a word starts with a consonant sound followed by "qu", move it to the end of the word, and then add an "ay" sound to the end of the word (e.g. "square" -> "aresquay").
  • Rule 4: If a word contains a "y" after a consonant cluster or as the second letter in a two letter word it makes a vowel sound (e.g. "rhythm" -> "ythmrhay", "my" -> "ymay").

There are a few more rules for edge cases, and there are regional variants too.

See http://en.wikipedia.org/wiki/Pig_latin for more details.

Testing

In order to run the tests for this track, you will need to install DUnitX. Please see the installation instructions for more information.

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Submitting Exercises

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For example, if you're submitting ubob.pas for the Bob exercise, the submit command would be something like exercism submit <path_to_exercism_dir>/delphi/bob/ubob.pas.

Source

The Pig Latin exercise at Test First Teaching by Ultrasaurus https://github.com/ultrasaurus/test-first-teaching/blob/master/learn_ruby/pig_latin/

Submitting Incomplete Solutions

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uTestPigLatin.pas

unit uTestPigLatin;

interface
uses
  DUnitX.TestFramework;

const
  CanonicalVersion = '1.2.0';

type
  [TestFixture]
  PigLatinTest = class(TObject)
  published
//    [Ignore('Comment the "[Ignore]" statement to run the test')]
    procedure Word_beginning_with_a;

    [Ignore]
    procedure Word_beginning_with_e;

    [Ignore]
    procedure Word_beginning_with_i;

    [Ignore]
    procedure Word_beginning_with_o;

    [Ignore]
    procedure Word_beginning_with_u;

    [Ignore]
    procedure Word_beginning_with_a_vowel_and_followed_by_a_qu;

    [Ignore]
    procedure Word_beginning_with_p;

    [Ignore]
    procedure Word_beginning_with_k;

    [Ignore]
    procedure Word_beginning_with_x;

    [Ignore]
    procedure Word_beginning_with_q_without_a_following_u;

    [Ignore]
    procedure Word_beginning_with_ch;

    [Ignore]
    procedure Word_beginning_with_qu;

    [Ignore]
    procedure Word_beginning_with_qu_and_a_preceding_consonant;

    [Ignore]
    procedure Word_beginning_with_th;

    [Ignore]
    procedure Word_beginning_with_thr;

    [Ignore]
    procedure Word_beginning_with_sch;

    [Ignore]
    procedure Word_beginning_with_yt;

    [Ignore]
    procedure Word_beginning_with_xr;

    [Ignore]
    procedure y_is_treated_like_a_consonant_at_the_beginning_of_a_word;

    [Ignore]
    procedure y_is_treated_like_a_vowel_at_the_end_of_a_consonant_cluster;

    [Ignore]
    procedure y_as_second_letter_in_two_letter_word;

    [Ignore]
    procedure A_whole_phrase;
  end;

implementation
uses uPigLatin;


{ PigLatinTest }

procedure PigLatinTest.A_whole_phrase;
begin
  Assert.AreEqual('ickquay astfay unray', TPigLatin.Translate('quick fast run'));
end;

procedure PigLatinTest.Word_beginning_with_a;
begin
  Assert.AreEqual('appleay', TPigLatin.Translate('apple'));
end;

procedure PigLatinTest.Word_beginning_with_a_vowel_and_followed_by_a_qu;
begin
  Assert.AreEqual('equalay', TPigLatin.Translate('equal'));
end;

procedure PigLatinTest.Word_beginning_with_ch;
begin
  Assert.AreEqual('airchay', TPigLatin.Translate('chair'));
end;

procedure PigLatinTest.Word_beginning_with_e;
begin
  Assert.AreEqual('earay', TPigLatin.Translate('ear'));
end;

procedure PigLatinTest.Word_beginning_with_i;
begin
  Assert.AreEqual('iglooay', TPigLatin.Translate('igloo'));
end;

procedure PigLatinTest.Word_beginning_with_k;
begin
  Assert.AreEqual('oalakay', TPigLatin.Translate('koala'));
end;

procedure PigLatinTest.Word_beginning_with_o;
begin
  Assert.AreEqual('objectay', TPigLatin.Translate('object'));
end;

procedure PigLatinTest.Word_beginning_with_p;
begin
  Assert.AreEqual('igpay', TPigLatin.Translate('pig'));
end;

procedure PigLatinTest.Word_beginning_with_qu;
begin
  Assert.AreEqual('eenquay', TPigLatin.Translate('queen'));
end;

procedure PigLatinTest.Word_beginning_with_qu_and_a_preceding_consonant;
begin
  Assert.AreEqual('aresquay', TPigLatin.Translate('square'));
end;

procedure PigLatinTest.Word_beginning_with_q_without_a_following_u;
begin
  Assert.AreEqual('atqay', TPigLatin.Translate('qat'));
end;

procedure PigLatinTest.Word_beginning_with_sch;
begin
  Assert.AreEqual('oolschay', TPigLatin.Translate('school'));
end;

procedure PigLatinTest.Word_beginning_with_th;
begin
  Assert.AreEqual('erapythay', TPigLatin.Translate('therapy'));
end;

procedure PigLatinTest.Word_beginning_with_thr;
begin
  Assert.AreEqual('ushthray', TPigLatin.Translate('thrush'));
end;

procedure PigLatinTest.Word_beginning_with_u;
begin
  Assert.AreEqual('underay', TPigLatin.Translate('under'));
end;

procedure PigLatinTest.Word_beginning_with_x;
begin
  Assert.AreEqual('enonxay', TPigLatin.Translate('xenon'));
end;

procedure PigLatinTest.Word_beginning_with_xr;
begin
  Assert.AreEqual('xrayay', TPigLatin.Translate('xray'));
end;

procedure PigLatinTest.y_as_second_letter_in_two_letter_word;
begin
  Assert.AreEqual('ymay', TPigLatin.Translate('my'));
end;

procedure PigLatinTest.y_is_treated_like_a_consonant_at_the_beginning_of_a_word;
begin
  Assert.AreEqual('ellowyay', TPigLatin.Translate('yellow'));
end;

procedure PigLatinTest.y_is_treated_like_a_vowel_at_the_end_of_a_consonant_cluster;
begin
  Assert.AreEqual('ythmrhay', TPigLatin.Translate('rhythm'));
end;

procedure PigLatinTest.Word_beginning_with_yt;
begin
  Assert.AreEqual('yttriaay', TPigLatin.Translate('yttria'));
end;

initialization
  TDUnitX.RegisterTestFixture(PigLatinTest);
end.
unit uPigLatin;

interface

type
  TPigLatin = class
  private
    class function Rotate(AWord: string) : string;
    class function PigWord(AWord : string) : string;
  public
    class function Translate(AInp : string) : string;
  end;

implementation

{ TPigLatin }

uses System.SysUtils;

class function TPigLatin.PigWord(AWord: string): string;

  function ConsGrp(AWord : string) : string;
  begin
    if AWord.StartsWith('xr') or (AWord[1] in ['a', 'e', 'i', 'o', 'u', 'y'])  then
      exit(AWord);
    if (AWord[1] = 'q') and (AWord[2] = 'u')then
      exit(Rotate(Rotate(AWord)));
    Result := ConsGrp(Rotate(AWord));
  end;

begin
  if (AWord[1] = 'y') and  not AWord.StartsWith('yt') then
    AWord := Rotate(AWord);
  Result := ConsGrp(AWord);
end;

class function TPigLatin.Rotate(AWord: string): string;
begin
  Result := (AWord + AWord[1]).Remove(0,1);
end;

class function TPigLatin.Translate(AInp: string): string;
var sa : TArray<String>;
s : string;
begin
  Result := '';
  sa := AInp.Split([' ']);
  for s in sa do
    Result := TrimLeft(Result + ' ' +  PigWord(s.ToLowerInvariant) + 'ay');
end;

end.

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