[erlang-questions] conditional expressions
Sat Nov 15 22:22:04 CET 2008
X is bound to aaa in the first line you enter in the shell, so your second
line is really "case bbb of  -> aaa = aaa; aaa -> ok end.".
You can unbind/forget X in the shell with f() or f(X), see help().
1> case  of  -> X = aaa; X -> ok end.
3> case bbb of  -> X = aaa; X -> ok end.
** exception error: no case clause matching bbb
* 1: variable 'X' is unbound
7> case bbb of  -> X = aaa; X -> ok end.
2008/11/15 damien morton <>
> 1> case  of  -> X = aaa; X -> ok end.
> 2> case bbb of  -> X = aaa; X -> ok end.
> ** exception error: no case clause matching bbb
> am I missing something?
> On Sun, Nov 16, 2008 at 4:42 AM, mats cronqvist <> wrote:
>> strangely, this also works;
>> case foo() of
>>  -> X = bar();
>> X -> ok
>> as long as X is bound in each clause, you're golden.
>> this might qualify as a gotcha.
> erlang-questions mailing list
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