💰 ポーカースターズ zoom 攻略

after consdering the various code, i come up with this code. we have to use the patter match for the conditional execution. well, it's not bad. but i feel some oddities on erlang's exception and that is the concept of class. for exceptions of class throw, that is the code called throw term , term is returned. my guess is to keep the backward compatibility. it's too verbose and ugly but i think alternatives are worse. here is the verbose code. erlang has exception like many other langauges. but what if the caller want to deal with the error? the catch expression. well, at least, i understand the error handling of erlang.{/INSERTKEYS}{/PARAGRAPH} the erlang has three class of exception: error, exit, and throw. catch exprs catch expression evaluate exprs and return its value on no exception. another type of error is although the query paramters are present, it has a string that cannot be parsed as an integer. suppose, the users forget the query parameters. walkthrough of hello world http server with erlang, cowboy, and rebar3 instead of returning the hello world, we're going to return the sum of two query parameter a, b. but if you care, that is, you want to run some code on the condition of exception, things get verbose. you can use try expression or catch expression try expression is strightforward, if you ignore the awkward erlang grammer that is. {PARAGRAPH}{INSERTKEYS}so hopefully, the higher framework catch these exceptions and restart the process. let's quickly borrow a code from the hello world http server i explained in the previous article. if you don't care about exception, you need to do nothing. try expression can have of section and it will be evaluated only on no exception in exprs. putting it all togather, it's very verbose to handle errors in erlang. whichever you use, it became quite verbose and boilar-plate. but i want to deal the the error. the simplest code that assume no error will be like this. use try expression's of section to pattern match the error value. we can do condional branching with either case expression or function pattern match. it can be done by case expression or function.