Assignment: Consider a list of keyword-value tuples, such as [{erlang, "a functional language"}, {ruby, "an OO language"}]. Write a function that accepts the list and a keyword and returns the associated value for the keyword.

key_lookup.erl

- module(key_lookup).
- export([search/2]).

%Assignment: Consider a list of keyword-value tuples, such as  [{erlang, "a functional language"}, {ruby, "an OO language"}]. Write a function that accepts the list and a keyword and returns the associated value for the keyword.
search(Key, List) -> do_search(Key, List).
 
%With the use of pattern matching we are able to have the do_search1 return once we
%hit the result.
do_search(Key, [{Key, Value}|_]) ->
    io:fwrite("do_search1 Keyword(~p) Value(~p)\n", [Key, Value]),
    Value;
%This one keeps on calling itself. Taking the tail till it hits the above method.
do_search(Key, [_|T]) ->
    io:fwrite("do_search2 Keyword(~p) Tail(~p)\n", [Key, T]),
    do_search(Key, T).