[ale] perl regex.... again

[Geoffrey Myers]

Ron Frazier wrote:
> I don't know perl, but don't flame me. I'm posting this to possibly 
> stimulate thought. From a generic programming perspective, could you do 
> something like the following? This is pseudocode, not a particular 
> language. This syntax is not designed to be put directly into a script. 
> I'm just throwing this out, and haven't tested it.
> 
> This assumes you can call grep from Perl, and that the line to be tested 
> is in a file called lineoftext.txt . Use grep to count the matches of 
> the pattern. Uses some of grep's predefined patterns per the man page. 
> This assumes those patterns work for your purpose.
> 
> linelength := length ( lineoftext.txt ) // get the length of the string
> if linelength > 0 // there are characters in the file
> for counter = 1 to linelength // iterate through each character in the 
> string
> thischaracter := lineoftext.txt [ counter ] // extract the character at 
> the "counter" position in the string
> if result ( grep -c [:alnum:] thischaracter ) == 0 // this character is 
> NOT alphanumeric
> andif result ( grep -c [:punct:] thischaracter ) == 0 // this character 
> is NOT punctuation
> andif result ( grep -c [:space:] thischaracter ) == 0 // this character 
> is NOT a space
> andif asciivalue ( thischaracter ) <> 9 // this character is NOT a TAB
> print "character out of bounds"
> set appropriate warning flag
> endif
> endif
> endif
> endif
> next counter
> elseif linelength == 0 // there are no characters in the file
> print "there is nothing to test"
> set appropriate warning flag
> endif

Thanks for the effort, it appears I have a working solution though.

> 
> 
> On 02/28/2011 12:59 PM, Geoffrey Myers wrote:
>> I'll try this again as I didn't get any bites before.  I'm trying to
>> come up with a perl regex that will identify a line of data that has any
>> character outside of alphanumeric, punctuation, spaces, tabs.
>>
>> Can't seem to formulate.
>>
>> anyone?
>>
>>    
> 


-- 
Until later, Geoffrey

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