Re: Identifying empty lines of text

[J. Landman Gay via use-livecode]

On Jan 12, 2018, at 16:48 , David Epstein via use-livecode 
 wrote:

I use “the number of words in myString = 0” to test whether a line of text 
appears empty, since I want a line with only space characters to be understood 
as empty.
But a line of text I pasted from elsewhere contained an invisible character 
whose charToNum value is 202, and this was counted as a word by my script.
Is there a better way to test for a line of text that has no visible characters?


Here's where the "trueword" keyword comes in handy:

   put the number of truewords in line x of fld y

It will ignore invisible and whitespace characters.


--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com


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Re: Identifying empty lines of text

[Bob Sneidar via use-livecode]

I have a simple function which will return a string with all non-allowed 
characters stripped from it. 

function cleanASCII pString, pModeList, pCustomList
   /*
   pModeList is a comma delimited list that may contain the following values:
   "lowercase,uppercase,numbers,tabs,newlines,returns,spaces,symbols,custom"
   If custom is used, then a third paramaeter containing allowed characters 
must be supplied. 
   */
   if pModeList is empty then
  put " 0-9a-zA-Z" into tAllowedChars
   end if
   
   repeat for each item pMode in pModeList
  put word 1 of pMode into pMode
  
  switch
break
 case "tabs" is in pMode
put "\t" after tAllowedChars
break
 case "newlines" is in pMode
put "\n" before tAllowedChars
break
 case "returns" is in pMode
put "\r" before tAllowedChars -- currently not working
break
 case "spaces" is in pMode
put " " after tAllowedChars
break
 case "numbers" is in pMode
put "0-9" after tAllowedChars
break
 case "lowercase" is in pMode
put "a-z" after tAllowedChars
break
 case "uppercase" is in pMode
put "A-Z" after tAllowedChars
break
 case "symbols" is in pMode
put "!#$%&'()*+,./:;<=>?@[\\_`{|}~^-" after tAllowedChars
break
 case pMode is "custom"
put pCustomList after tAllowedChars
break
  end switch
   end repeat
   
   put "[" & tAllowedChars & "]" into tMatchText
   
   repeat for each character  theChar in pString
  if matchtext(theChar, tMatchText) is true then
 put theChar after cleanString
  end if
   end repeat
   
   return cleanString
end cleanASCII

Bob S


> On Jan 12, 2018, at 16:48 , David Epstein via use-livecode 
>  wrote:
> 
> I use “the number of words in myString = 0” to test whether a line of text 
> appears empty, since I want a line with only space characters to be 
> understood as empty.
> But a line of text I pasted from elsewhere contained an invisible character 
> whose charToNum value is 202, and this was counted as a word by my script.
> Is there a better way to test for a line of text that has no visible 
> characters?
> Many thanks.
> 
> David Epstein

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Re: Identifying empty lines of text

[hh via use-livecode]

> hh wrote:
> You could try to use (respects UCI word boundaries):
> if the num of trueWords in myString is 0
> Works here in LC 7 and later.

Sorry: ICU - International Components for Unicode (not UCI).

>> I use “the number of words in myString = 0” to test whether
>> a line of text appears empty, since I want a line with only
>> space characters to be understood as empty.
>> But a line of text I pasted from elsewhere contained an
>> invisible character whose charToNum value is 202, and this
>> was counted as a word by my script.
>> Is there a better way to test for a line of text that has no
>> visible characters?
>> Many thanks.
>> 
>> David Epstein


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Re: Identifying empty lines of text

[hh via use-livecode]

You could try to use (respects UCI word boundaries):

if the num of trueWords in myString is 0

Works here in LC 7 and later.

> I use “the number of words in myString = 0” to test whether
> a line of text appears empty, since I want a line with only
> space characters to be understood as empty.
> But a line of text I pasted from elsewhere contained an
> invisible character whose charToNum value is 202, and this
> was counted as a word by my script.
> Is there a better way to test for a line of text that has no
> visible characters?
> Many thanks.
> 
> David Epstein


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Re: Identifying empty lines of text

[Phil Davis via use-livecode]

I wonder if the 202 value would disappear if you did this:

   put textDecode(the clipboarddata["text"], "utf8") into field 1

I don't know the answer, just putting it out there.

Phil Davis


On 1/12/18 4:48 PM, David Epstein via use-livecode wrote:

I use “the number of words in myString = 0” to test whether a line of text 
appears empty, since I want a line with only space characters to be understood 
as empty.
But a line of text I pasted from elsewhere contained an invisible character 
whose charToNum value is 202, and this was counted as a word by my script.
Is there a better way to test for a line of text that has no visible characters?
Many thanks.

David Epstein
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--
Phil Davis

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Identifying empty lines of text

[David Epstein via use-livecode]

I use “the number of words in myString = 0” to test whether a line of text 
appears empty, since I want a line with only space characters to be understood 
as empty.
But a line of text I pasted from elsewhere contained an invisible character 
whose charToNum value is 202, and this was counted as a word by my script.
Is there a better way to test for a line of text that has no visible characters?
Many thanks.

David Epstein
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