Thanks Keith.
----- Original Message -----
From: "Keith Clarke" <keith.cla...@clarkeandclarke.co.uk>
To: "How to use LiveCode" <use-livecode@lists.runrev.com>
Sent: Tuesday, August 02, 2011 3:01 AM
Subject: Re: What is the best/fastest way to extract strings of text?
The recipe I (learned here and) use with extracting specific HTML / XML
elements is to get the specific target elements on their own line, remove
the unwanted lines and then move the target string items in the remaining
lines out into a separate variable - something like...
1. Get the target elements into their own line by prefixing the opening
tag with return, using: replace "<#B>" with return & "<#B>" in theSource
2. Get the closing tag onto its own line by adding a return suffix, using:
replace "<#E>" with "<#E>" & return in theSource
2. Remove the unwanted lines, (that lack the specific opening tag) using:
filter theSource with "<#B>"
3. Delimit the line into items at the '>' character, using: set the item
delimiters to numtochar(62)
4. Iterate through the list to extract the string, using:
repeat for each line l in theSource
put item 2 and return after theExtract
end repeat
5. Clean-up the extract of any extra returns, using: filter theExtract
without empty
If (my pre-coffee brain worked) theExtract should contain the tagged
strings in theSource.
...hmmm, talking of coffee...
Best,
Keith..
On 2 Aug 2011, at 08:24, Keith (Gulf Breeze Ortho Lab) wrote:
Hello,
I am still playing with LiveCode and am now exploring chunks...
My question is as follows. Suppose I have a variable with a lot of text.
Throughout the text I have various strings, separated by consistent tags,
that I need to extract.
For example, the following text is in the variable myVar:
The boy <#B>went to the store<#E>. He enjoyed his day out.
The woman loves <#B>shopping at the mall<#E>. So do I.
The girl loves <#E>eating at the restaurant<#E>. So does he.
I am looking for the most efficient way to extract each of the strings of
text between the <#B> and <#E> tags... I presume I will have to use a
loop and the matchChunk function? I have experimented but am having a
problem putting starting and ending positions into variables.
Is there a better way to accomplish the above?
Thanks!
- Boo
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