Question

Transforming strings in a view column

Asked by: mshogren

Hi all,

I have a view showing titles of real documents which our office maintains.  Unfortunately during cataloging some of the titles have been entered more than once, but possibly with a slight change of punctuation or case.  I want to be able to categorise the titles so I can see which ones are duplicated but it is not quite as simple as that.  I want the categorised column of the view to contain the title in all lowercase (easy) but also without any non-alpha-numeric characters other than spaces.

Can anyone think of an easy way to do this in a view column formula?  I don't want to have to explicitly replace every possible character with an empty string because there are too many.  And I am not allowed to add another field to the documents to calculate the value I want using Lotus Script or Java.

Thanks in advance. I am looking forward to some interesting ideas.

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Asked On
2005-09-16 at 03:00:42ID21563701
Tags

lotus

,

view

Topic

Lotus Notes

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1
Points
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Comments
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Answers

 

by: sjef_bosmanPosted on 2005-09-16 at 03:05:48ID: 14896710

There is
    @ReplaceSubstring(yourstring; ".":",":"_":"/"; "")
or
    @Implode(@Explode(yourstring; ".,:;-_=+"); "")

There's another feature of Notes that might be helpful: @Soundex

 

by: mshogrenPosted on 2005-09-16 at 03:43:29ID: 14896842

The problem with using @ReplaceSubstring is that I don't know how many different characters I might need to replace.  There are some special characters like em-dashes and TM symbols.  I will have a look at @SoundEx though.

 

by: sjef_bosmanPosted on 2005-09-16 at 05:51:00ID: 14897457

Is it an exisiting database? And you don't want to update 200,000 documents? I have no other suggestion.

But if it's a new one: add a field that you compute using LotusScript. Very easy to remove unreadable characters.

 

by: mshogrenPosted on 2005-09-16 at 06:34:11ID: 14897803

I was afraid that was the answer I might receive.  I have to compile the list on Monday and wanted to spend as little time on it as possible.  Since I can't change the data on the production system, mostly because I have been directed not to do so by management, I may have to export the view to CSV and run a shell script on it to compile the list.  Still haven't figured out the best way to do that either, but here is not the place to ask such questions.

I will leave the question open for a few days to see if anyone comes up with anything new.

Thanks for the suggestions so far.

 

by: sjef_bosmanPosted on 2005-09-16 at 07:16:00ID: 14898169

There's also the @For in the Formula language. It's a horrible construction that had better not be used in a view. But if all else fails...

I'm much in favour of the Implode/Explode method, for you can create the string manually. Actually, you might need an additional @Trim in it, but that won't spoil the fun. If you know the ASCII-codes of the characters you need to replace, you could use a combination of the following
    nonchar:= "!\"#$%&'()*+,-./" + ":;<=>?@" + "[\\]^_`" + "{|}~";
    ctrlchar:= @Char(0) + @Char(1) + ... + @Char(32) + @Char(127);
    @Implode(@Trim(@Explode(yourstring; nonchar+ctrlchar); "")

@SoundEx no good??

 

by: mshogrenPosted on 2005-09-18 at 20:24:17ID: 14909264

sjef_bosman, you put me onto a good idea so you can have the points.  I used your method of imploding and exploding to get the string of characters I didn't want and then a similar method to remove them.  What I ended up with was this:

lowerString := @Implode(@LowerCase(inputString); "~");
charsToRemove := @Implode(@Explode(lowerString; "abcdefghijklmnopqrstuvwxyz0123456789 ~"); "");
finalString := @Implode(@Explode(lowerString; charsToRemove); "");
@Explode(finalString; "~")

 

by: sjef_bosmanPosted on 2005-09-19 at 01:13:21ID: 14910065

Thanks! Indeed, something like that crossed my mind... and then it was gone again. Well done! Instead of the "~" as a separator, you could use @Char(255) but that's not important. What of the speed of the view, has it become slow due to the Im-/Exploding?

 

by: mshogrenPosted on 2005-09-19 at 02:19:58ID: 14910300

No the view performance is fine.  It is not the biggest database we have luckily.

20120131-EE-VQP-002

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