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RegEx Faster? Easier? - SOLVED

 
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StreetRider



Joined: 19 Mar 2008
Posts: 73
Location: Euclid, Ohio
PostPosted: Sun May 11, 2008 4:29 pm    Post subject: RegEx Faster? Easier? - SOLVED Reply with quote
I can not seem to get my arms around RegEx. From what I understand it is probably faster and easier for this type of operation.

This is how I understand to do this the old BASIC method.

UPDATE: This code is a sample of code that is part of a parsing program that edits CNC fanuc code. There is a x value in the last line of code that I need to extract, make metric(*25.4) and save in a var that I can insert else where in the file. I have gotten everything to work, but the cod e is long and clumbsy. Can anyone help with maybe a RexEx usage. I plan on using this example to help explain the use to myself as well as us in my finish program.

Function: Look at the two variables. If %LastLine% has x it use it. If %LastLine% aslo contains y trim out x only.

Code:


StlLine= x1.2345 y12.123
LastLine= g01 y1.234

PullBack:= LastLine

IFNotInString , LastLine, x
   PullBack:= StlLine

IfInString, PullBack, Y
   Gosub TrimIT
MsgBox, %PullBack%
return

TrimIt:

StringGetpos, Y, PullBack, y
;Y:= InStr(PullBack, y)
MsgBox, %Y%
StringGetPos, X, PullBack, X
;X:= Instr(PullBack, X)
MsgBox, %X%
;StringLeft
StringMid, PullBack, PullBack, x, y - x   
Return




It seems to do what I need, but I bet there is a better way.. Smarter way?
Code:

StlLine= x1.2345 y12.123
LastLine= g01 y1.234

PullBack:= LastLine

IFNotInString , LastLine, x
   PullBack:= StlLine

IfInString, PullBack, Y
   Gosub TrimIT
MsgBox, %PullBack%
return

TrimIt:

RegExMatch(PullBack, "(?<=\bx)[+\-]*\d+(?:\.\d+)?(?=\s|$)", PullBack)
Return




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StreetRider
Euclid. Ohio

"New and Loving it!"

Last edited by StreetRider on Mon May 12, 2008 1:01 pm; edited 3 times in total
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Oberon



Joined: 18 Feb 2008
Posts: 408
PostPosted: Sun May 11, 2008 4:40 pm    Post subject: Reply with quote
Sorry I failed to understand your description and objectives, your choice of variable names didn't help either (PullBack??). Anyway if you want to extract only a certain word from a string regex can help:

Code:
var = x1.2345 y12.123
RegExMatch(var, "\bx.+?(?=\s|$)", var)
MsgBox, %var% ; gives: x1.2345

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StreetRider



Joined: 19 Mar 2008
Posts: 73
Location: Euclid, Ohio
PostPosted: Sun May 11, 2008 4:51 pm    Post subject: Thank you once again Oberon. Reply with quote
Well, the varialble labels would make sense if you were wrtiing the code for parsing a CNC fanuc file.

But your line of code does return what I need.

Well, almost. How about just the number so that I could perform math on the value and return it to my file at another point.

Also, Oberson. Are you having a bad day? You answered my question so beautifully that you must ahve understood my gibberish.

Thank you again. And have a GREAT DAY!
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StreetRider
Euclid. Ohio

"New and Loving it!"
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Oberon



Joined: 18 Feb 2008
Posts: 408
PostPosted: Sun May 11, 2008 5:33 pm    Post subject: Re: Thank you once again Oberon. Reply with quote
StreetRider wrote:
How about just the number so that I could perform math on the value and return it to my file at another point.
Change the expression to: (?<=\bx)[+\-]*\d+(?:\.\d+)?(?=\s|$)
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Guest
PostPosted: Sun May 11, 2008 6:27 pm    Post subject: Reply with quote
you really need this

http://gskinner.com/RegExr/
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Krogdor



Joined: 18 Apr 2008
Posts: 23
PostPosted: Sun May 11, 2008 9:57 pm    Post subject: Reply with quote
I know this is off topic but...

To whoever that Guest is,

I love you.
That site = <33333

I can barely comprehend the simplest of RegEx's, despite an online tutorial I've been looking through, and that site is just plain awesome.

Thank you Very Happy
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NLI-Conquer
Guest
PostPosted: Mon May 12, 2008 12:58 am    Post subject: Reply with quote
Krogdor:

Its always a good idea to edit your main post and put [Solved] in the thread title once its solved, so when users are searching for their answers (even though I swear 80% of the forum doesn't know the Search button is there), they will know that the thread is solved.

Thx for listening. Wink
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