Hi Gerry,
Roy's initial email indicates he tried both "*" and ".*" but neither worked.
So I'm sticking with my initial guess of broken greediness.
... But we'll never know for sure as regular expressions are pretty
much a black box operation.
Incantations, indeed.
Ethan
On 2/15/2013 10:35 PM, Gerry Creager - NOAA Affiliate wrote:
Ethan
The problem he had, actually, was that he had not used the '.*'
construct but instead, tried what we've all done: "*". getting used to
the '.*' construct, which will work most everywhere, on the command
line, that '*' works.
Tom Yoksas is the one who beat me into submission on regex.
gerry
On Fri, Feb 15, 2013 at 11:26 PM, Roy Mendelssohn - NOAA Federal
<roy.mendelssohn@xxxxxxxx <mailto:roy.mendelssohn@xxxxxxxx>> wrote:
:-)
I think what these means is that I am possessed with reluctant greed.
-Roy
On Feb 15, 2013, at 9:17 PM, Ethan Davis <edavis@xxxxxxxxxxxxxxxx
<mailto:edavis@xxxxxxxxxxxxxxxx>> wrote:
> Hi Roy,
>
> Not much help here I'm afraid. But I can't pass up a chance to
talk regular expressions.
>
> Roy wrote:
>> Okay I am bad at regular expressions
>
> Everyone is bad at regular expressions, even those of us who
"like" them. They have arcane rules (e.g., greedy vs reluctant
quantifiers [1]) which requires a lot of attention to detail and,
to top it all off, they are pretty much impossible to debug.
>
> For those who read [1] for the details, here's my guess as to
why your first attempt failed ...
> In your case, the ".*" is greedy but I'm guessing the way the
date stamp #yyyyMMddHH# is implemented breaks the backtracking
mechanism.
>
> Ethan
>
> [1]
http://stackoverflow.com/questions/5319840/greedy-vs-reluctant-vs-possessive-quantifiers
>
> This StackOverflow question is kind of humorous if you don't
really care about the answer. If you do care (i.e., anyone who has
to use regular expressions), then you have to read it for the
details and not the humor (sorry):
>
>
> On 2/15/2013 8:00 PM, Roy Mendelssohn - NOAA Federal wrote:
>> that was a typo on my part in setting up the example.. I have
pres$. After testing a lot of things, I think
junkF0..#yyyyMMddHH#pres$ works.
>>
>> -Roy
>>
>> On Feb 15, 2013, at 6:49 PM, Dennis Heimbigner
<dmh@xxxxxxxxxxxxxxxx <mailto:dmh@xxxxxxxxxxxxxxxx>> wrote:
>>
>>> One problem is that you have at the end
>>> pre$ rather than pres$
>>> The premature $ would cause a failure.
>>>
>>> Roy Mendelssohn - NOAA Federal wrote:
>>>> Hi All:
>>>> Okay I am bad at regular expressions, and I am having
problems giving featureCollections the correct match to find the
date for files that have slightly different names. To simplify
we want to have file that match
>>>> junkF0OF2013031206pres
>>>> junkF0RL2013031212pres
>>>> both included in the aggregation. I have tried
junk*#yyyyMMddHH#pre$ junk.*#yyyyMMddHH#pre$ and a few other
combinations and both have failed. Any suggetions appreciated.
>>>> -Roy M.
>>>> **********************
>>>> "The contents of this message do not reflect any position of
the U.S. Government or NOAA."
>>>> **********************
>>>> Roy Mendelssohn
>>>> Supervisory Operations Research Analyst
>>>> NOAA/NMFS
>>>> Environmental Research Division
>>>> Southwest Fisheries Science Center
>>>> 1352 Lighthouse Avenue
>>>> Pacific Grove, CA 93950-2097
>>>> e-mail: Roy.Mendelssohn@xxxxxxxx
<mailto:Roy.Mendelssohn@xxxxxxxx> (Note new e-mail address)
>>>> voice: (831)-648-9029 <tel:%28831%29-648-9029>
>>>> fax: (831)-648-8440 <tel:%28831%29-648-8440>
>>>> www: http://www.pfeg.noaa.gov/
>>>> "Old age and treachery will overcome youth and skill."
>>>> "From those who have been given much, much will be expected"
"the arc of the moral universe is long, but it bends toward
justice" -MLK Jr.
>>>> _______________________________________________
>>>> thredds mailing list
>>>> thredds@xxxxxxxxxxxxxxxx <mailto:thredds@xxxxxxxxxxxxxxxx>
>>>> For list information or to unsubscribe, visit:
http://www.unidata.ucar.edu/mailing_lists/
>> **********************
>> "The contents of this message do not reflect any position of
the U.S. Government or NOAA."
>> **********************
>> Roy Mendelssohn
>> Supervisory Operations Research Analyst
>> NOAA/NMFS
>> Environmental Research Division
>> Southwest Fisheries Science Center
>> 1352 Lighthouse Avenue
>> Pacific Grove, CA 93950-2097
>>
>> e-mail: Roy.Mendelssohn@xxxxxxxx
<mailto:Roy.Mendelssohn@xxxxxxxx> (Note new e-mail address)
>> voice: (831)-648-9029 <tel:%28831%29-648-9029>
>> fax: (831)-648-8440 <tel:%28831%29-648-8440>
>> www: http://www.pfeg.noaa.gov/
>>
>> "Old age and treachery will overcome youth and skill."
>> "From those who have been given much, much will be expected"
>> "the arc of the moral universe is long, but it bends toward
justice" -MLK Jr.
>>
>> _______________________________________________
>> thredds mailing list
>> thredds@xxxxxxxxxxxxxxxx <mailto:thredds@xxxxxxxxxxxxxxxx>
>> For list information or to unsubscribe, visit:
http://www.unidata.ucar.edu/mailing_lists/
>
> _______________________________________________
> thredds mailing list
> thredds@xxxxxxxxxxxxxxxx <mailto:thredds@xxxxxxxxxxxxxxxx>
> For list information or to unsubscribe, visit:
http://www.unidata.ucar.edu/mailing_lists/
**********************
"The contents of this message do not reflect any position of the
U.S. Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097
e-mail: Roy.Mendelssohn@xxxxxxxx <mailto:Roy.Mendelssohn@xxxxxxxx>
(Note new e-mail address)
voice: (831)-648-9029 <tel:%28831%29-648-9029>
fax: (831)-648-8440 <tel:%28831%29-648-8440>
www: http://www.pfeg.noaa.gov/
"Old age and treachery will overcome youth and skill."
"From those who have been given much, much will be expected"
"the arc of the moral universe is long, but it bends toward
justice" -MLK Jr.
_______________________________________________
thredds mailing list
thredds@xxxxxxxxxxxxxxxx <mailto:thredds@xxxxxxxxxxxxxxxx>
For list information or to unsubscribe, visit:
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--
Gerry Creager
NSSL/CIMMS
405.325.6731
