Sunday Feb 10, 2019 - Learning Erlang for an hour

sunday.erl

23> Person = {person, {age, 34}, {hobby, "biking"}}.
{person,{age,34},{hobby,"biking"}}
24> A.          
* 1: variable 'A' is unbound
25> B.
* 1: variable 'B' is unbound
26> A, B = Person.
* 1: variable 'A' is unbound
27> {A, B} = Person
27> .
** exception error: no match of right hand side value {person,{age,34},{hobby,"biking"}}
28> {Type, HobbyName, HobbyType} = Person.
{person,{age,34},{hobby,"biking"}}
29> Type
29> .
person
30> Hobby.
* 1: variable 'Hobby' is unbound
31> HobbyName.
{age,34}
32> Person
32> .
{person,{age,34},{hobby,"biking"}}
33> HobbyType.
{hobby,"biking"}
34> MoneyOnHand = {"cash", 7}.
{"cash",7}
35> Multiplier = fun({Desc, Amt}) -> io.fwrite("10x~n", []), Amt*10 end.
* 1: syntax error before: '.'
35> Multiplier = fun({Desc, Amt}) -> Amt*10 end.                        
#Fun<erl_eval.6.99386804>
36> Multiplier(MoneyOn).
* 1: variable 'MoneyOn' is unbound
37> Multiplier(MoneyOnHand).
70
38> io:fwrite("what if you had 10x $$$'s ~n", []).
what if you had 10x $$$'s 
ok
39>