ListPopper -  what would that do?

I might be misunderstanding but instead of manipulating the list before
exploding why not explode everything, use a CharacterCodeExtractor to
grab the first character and then a Tester to see if it is an S.

Mark

Mark Ireland, Product Support Engineer
Safe Software Inc. Surrey, BC, CANADA
[EMAIL PROTECTED] http://www.safe.com
Solutions for Spatial Data Translation, Distribution and Access


> -----Original Message-----
> From: Jason Birch [mailto:[EMAIL PROTECTED] 
> Sent: Tuesday, March 08, 2005 10:39 AM
> To: [email protected]
> Cc: annettefarrell
> Subject: RE: [fme] listexploder transformer
> 
> Hi,
> 
> I don't know if this is any more efficient than the method 
> you're using, but... I've attached a workspace that uses a 
> Grepper with the expression ^([^S]*)(.*)$ to split out the 
> first part of the string from the symbol code then does a 
> ListExploder to generate the individual features.
> There are a couple intermediate steps to clean up the text 
> list before doing the ListExploder.
> 
> There are a few cases where features get dropped by the 
> ListExploder, but as long as each feature entering this 
> workspace has at least two items (ID and SYMBOL) in the list, 
> you should be OK.
> 
> Note for Safe:  This would be a lot easier there was a 
> ListPopper transformer (from either end).  Not sure how this 
> would work with multi-attribute lists though.
> 
> Jason
>  
> 
> -----Original Message-----
> From: annettefarrell [mailto:[EMAIL PROTECTED]
> Sent: Monday, March 07, 2005 08:05
> To: [EMAIL PROTECTED]
> Subject: [fme] listexploder transformer
> 
> 
> 
> 
> Hi,
> 
> I'm wondering is there an easier way to use listexploder transformer?
> 
> I was to output everything but the last element of a list.  The last
> element of the list will differ from the other elements in 
> that it will
> always begin with S e.g. 3102, 3128, S013
> 
> Length of the list will vary.
> 
> Here's a bit more detail.
> 
> I have (Irish) ntf data with point data with an attribute
> feature_code_list. Basically this same as UK ntf data but points and
> lines are not represented on multiple layers so this needs to be
> handled.
> 
> Let's say for example the value of this feature_code_list 
> attribute for
> one point is 3102, 3128, S013
> 
> I want to output 2 point features
> Associating the symbol information S013 with each point.  The 
> attribute
> beginning with S is the symbol information.  It will always 
> be the last
> element in the list.  
> 
> I can do this for a list of 3 elements in a convoluted manner using a
> tester to compute length of lists etc.
> What I've been doing in the
> is computing the length of the list
> getting the index number of the last element of the list: 
> length of list
> -1 and using a tester to compute if the length of the list > 2 and the
> index number is >=2
> 
> Instead of hardcoding the value 2 I can using a value based on the
> length of the feature list so that the method will work where the
> FEATURE_CODE_LIST attribute contains more or less than 3 pieces of
> information.
> 
> There should be a better way to do this.  Will the above method impact
> on performace?
> 
> Here are my ideas:
> 
> Would using a grepper transformer to check if the list attribute
> contains a character S?
> 
> I tried using Attribute Classifier but don't think integer will do the
> trick.
> 
> Or what is the best method to use the listexploder, exploding 
> everything
> but the last element of the list?
> 
> Any thoughts would be appreciated.
> 
> Thanks
> 
> A
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Get the maximum benefit from your FME, FME Objects, or 
> SpatialDirect via
> our Professional Services team.  Visit www.safe.com/services for
> details. 
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 
> 
> Get the maximum benefit from your FME, FME Objects, or 
> SpatialDirect via our Professional Services team.  Visit 
> www.safe.com/services for details. 
> Yahoo! Groups Links
> 
> 
> 
>  
> 


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