[erlang-questions] parsing text

[Joe Armstrong]

I think I'd have pretended that the input string were Erlang tokens.
I'd then use the Erlang tokeniser and pattern match the output, thusly:

1 > X="<B>Page Counter</B></TD><TD>4880</TD></TR>".
..
2 > hd([I || {integer,_,I} <- element(2, erl_scan:string(X))]).
4880

erl_scan:string is your friend :-)

/Joe

[I know it's cheating, so your don't have to tell me]






On Fri, Apr 30, 2010 at 9:49 PM, Wes James <comptekki@REDACTED> wrote:
> On Fri, Apr 30, 2010 at 1:46 PM, Colm Dougan <colm.dougan@REDACTED> wrote:
>> If you already found the offset of the start of the number then you
>> can use string:to_inetger (or more generally io_lib:fread) to extract
>> the number, regardless of it being variable length.
>>
>> Eshell V5.7.5  (abort with ^G)
>> 1> string:to_integer("4880</TD></TR>").
>> {4880,"</TD></TR>"}
>>
>> Eshell V5.7.5  (abort with ^G)
>> 1> io_lib:fread("<TD>~d</TD></TR>", "<TD>4880</TD></TR>").
>> {ok,[4880],[]}
>>
>> Colm
>
>
> Hey that's cool!  Thx Colm!
>
> -wes
>
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