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-module(ex1_shapes).
-export([perimeter/1,test_perimeter/0,area/1,test_area/0,enclose/1,test_enclose/0,run_tests/0]).

%% Perimeter function and tests
perimeter({circle, R}) ->
    {ok, math:pi() * 2 * R};
perimeter({rectangle, {A, B}}) ->
    {ok, 2 * A + 2 * B};
perimeter({square, A}) ->
    {ok, 4 * A};

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-module(ex1_bits).
-export([bits_direct/1,test_bits_direct/0,bits_tail/2,test_bits_tail/0,run_tests/0]).

bits_direct(0) ->
    0;
bits_direct(N) ->
    N rem 2 + bits_direct(N div 2).

bits_tail(0, B) ->
    B;

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-module(index).
-export([get_file_contents/1
        ,show_file_contents/1
        ,main/1

        % for tests
        ,get_words/4
        ,get_numbered_words/1
        ,sort_word_pair/2
        ,test_sort_word_pair/0

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-module(hofex).
-export([add/1,times/1,compose/2,id/1,iterate/1
        , compose_all/1
        , test_compose_all/0
        , twice/1
        , test_twice/0
        , test_iterate/0
        ]).

add(X) ->

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-module(rps_game).
-export([play/1,echo/1,play_two/3,play_two/4,rock/1,no_repeat/1,const/1,enum/1,cycle/1,rand/1,val/1,tournament/2
        , least_freq/1
        , most_freq/1
        , rand_strategies/1
        , best_strategy/1

        , t_const/1
        , t_cycle/1
        , t_echo/0

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%% Based on code from 
%%   Erlang Programming
%%   Francecso Cesarini and Simon Thompson
%%   O'Reilly, 2008
%%   http://oreilly.com/catalog/9780596518189/
%%   http://www.erlangprogramming.org/
%%   (c) Francesco Cesarini and Simon Thompson

-module(frequency2).
-export([start/0,allocate/0,deallocate/1,stop/0]).

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-module(billing).
-export([ get_data/0 
        , get_barcodes/0
        , get_bill/3
        , print_bill/1
        , test_print_bill/0
        , test_print_bill2/0
        , test_print_bill3/0
        ]).

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%% Based on code from 
%%   Erlang Programming
%%   Francecso Cesarini and Simon Thompson
%%   O'Reilly, 2008
%%   http://oreilly.com/catalog/9780596518189/
%%   http://www.erlangprogramming.org/
%%   (c) Francesco Cesarini and Simon Thompson

% Using the observer, set up a system of frequency server and at least two clients, and kill the frequency server when the clients are in possession of a frequency – you can make the clients “sleep” at any point using the timer:sleep/1 function – observe that the clients are killed too.
% How would you modify the clients so that they are not affected by the server terminating? How could you then shut down the entire system if you needed to?

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%% Based on code from 
%%   Erlang Programming
%%   Francecso Cesarini and Simon Thompson
%%   O'Reilly, 2008
%%   http://oreilly.com/catalog/9780596518189/
%%   http://www.erlangprogramming.org/
%%   (c) Francesco Cesarini and Simon Thompson

-module(gf).
-behaviour(gen_server).

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module Alphabet exposing (..)

import Char


capitalLetters : List Char
capitalLetters =
    List.range (Char.toCode 'A') (Char.toCode 'Z')
        |> List.map Char.fromCode