remove empty lines

[Mark Smith]

What were your results? On this machine (Mac PB 1.5mhz) I got:

10000 lines in a field with approx. 1000 randomly placed empty lines

put fld text into variable, repeat for each, place new list into fld  
-- 78 millisecs
put fld text into variable, filter variable, put back into field --  
72 millisecs
simply filter field -- 70 millisecs

So not a huge difference between any of them.

Best,

Mark

On 3 Aug 2006, at 05:42, Richard Gaskin wrote:

> Alex Tweedly wrote:
>
>> ... you could do it like
>>> put fld 'emailList' into tEmailList
>>> put empty into tNewEmail
>>> repeat for each line tEmail in tEmailList
>>>    if line tEmail is not empty then
>>>       put tEmail & CR after tNewEmailList
>>>   end if
>>> end repeat
>>> put tNewEmailList into fld 'emailList'
>> but easier would be
>>> put fld 'emailList' into tEmailList
>>> filter tEmailList without empty
>>> put tEmailList into fld 'emailList'
>
> Easier to script, yes, but note the result from running this script  
> which compares both methods:
>
>
> on mouseUp
>   put 1000 into N
>   put fld 1 into tData
>   --
>   --
>   -- 1. repeat for each
>   --
>   put the millisecs into t
>   repeat N
>     --
>     put empty into R1
>     repeat for each line tLine in tData
>       if tLine is not empty then
>         put tLine &cr after R1
>       end if
>     end repeat
>     delete last char of R1
>     --
>   end repeat
>   put the millisecs - t into t1
>   --
>   --
>   -- 2. filter:
>   --
>   put the millisecs into t
>   repeat N
>     --
>     put tData into R2
>     filter R2 without empty
>     --
>   end repeat
>   put the millisecs - t into t2
>   --
>   --
>   -- Result:
>   put t1 && t2
> end mouseUp
>
>
> Did I write this wrong?
>
> Seems most times I benchmark "repeat for each" with the well- 
> optimized "put after" I get results that hold up surprisingly well.
>
> I have another post in the works with some other interesting  
> benchmarks related to processing lists (things I learned on summer  
> vacation <g>)...
>
> --
>  Richard Gaskin
>  Managing Editor, revJournal
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