Hi Risto,
Thank you! This is exactly what I mean.
best,
Yuheng
On Fri, Aug 22, 2014 at 3:13 AM, Risto Vaarandi <risto.vaara...@gmail.com>
wrote:
> 2014-08-22 6:21 GMT+03:00 Yuheng Du <yuhe...@clemson.edu>:
>
>> Hi guys,
>>
>> I have a user scenario like this:
>>
>> I am using a perl script to do a query which takes in two arguments. The
>> first argument is a string called 'deviceId', the second argument should be
>> a float point number representing a sensor reading.
>>
>> The input of SEC is in Json format:
>>
>> .....
>> "deviceId" => srb_2
>> "reading0“ => 0
>> "reading1" => -2.5
>> "reading2" => 3.5
>>
>> "deviceId" is captured using a Single rule, how can I efficiently
>> capture the value of each "readingN" 's float number using SEC pattern?
>>
>> Also if what I captured is a float point, how can I pass it as an
>> argument to Perl script?
>> Or if what I captured is using a regex like (-*)(\d+).(\d+), how can I
>> pass it as arguments to Perl script, since I might have 2 or 3 arguments?
>> Can I transfer the captured digits to a float number in Perl?
>>
>
> I am not sure I have fully understood the question, but it seems to me
> that it is just a matter of writing a proper regular expression to handle
> all possible float formats? For example, you can try
> => (-?\d+(?:\.\d+)?)$
> which checks the format of the float and sets $1 variable, but you can
> also try
> => (-?[\d.]+)$
> for very crude check which just verifies that data field consists of an
> optional minus, followed by a sequence of digits and dots.
>
> hth,
> risto
>
>
>> Thanks for help!
>>
>> best,
>>
>> Yuheng
>>
>>
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