Regular Expressions Board

[jcarmody]

It worked for me.

[Ray.R]

Thanks Jim,

I was using the "Search and Replace Pattern VI" with TRUE wired to "replace all?"

It did not replace any.

I will convert (create a subvi) using the while loop as you showed and I'm sure it will work. 

I wonder if I stumbled onto a bug with LV2010...

R

[jcarmody]

I didn't even think to try that, but it worked for me.  I just deleted the While Loop and wired the Boolean constant.

Have you right-clicked the node and checked "Regular Expression"?

[Ray.R]

d'Oh!!!

I wasn't using the Matche Regular Expression!!

I was using this one!  

Well, it partially worked...  😉

[jcarmody]

I used Search and Replace String, not Match Regular Expression.

[jcarmody]

I've posted another Regexp solution here which explains the following expression: (-?[\d]+\.?[\d]*)|(-?\.[\d]+).  I used it to extract numbers from a string.

It made me think of the expression, "If the only tool you have is a hammer, you tend to see every problem as a nail." ~ Abraham Maslow

[PhillipBrooks]

Regular Expressions: Now you have TWO problems

Lots of interesting info and tools listed in the Coding Horror blog post. What about LabVIEW?

I needed to process a bunch of old TestStand 1.0 and 3.0 HTML reports for import into a database. I thought, what a great way to learn regular expressions!

After some research, I kept reading "you can't use regex to parse HTML". Since I had structured HTML in two different flavors (basically out of the box reportgen_html and a couple of additions to the header) I tried anyway and came up with this. I had to parse the data further, but that was specific to my application. This VI was used to clean the HTML tags.

[Ray.R]

Thanks Philip,

I will probably borrow from your code when I get a chance to return to the project that I was working on and posted earlier in this thread.

You should submit this for the example code contest.

[Ben]

See here for an example to toss bad nodes in a VRML file.

Two solutions offered are;

and

Ben

[jcarmody]

I answered this question:

---

@emyh wrote:

[...] have: C1-C10

(C1-C10 means there are actually ten cmponents; C1, C2, C3...C10)

I now want to convert the array containing C1-C10 into an array looking like this:

C1

C2

C3

.

.

.

C10

[...]

---

... with this Regexp:

Read the Regexp like:

• ([A-Z])  find an upper case alpha-character and store it in a backreference
• ([0-9]+) find one or more digits and store it, too, in a backreference
• - find a "-"
• (\1) find what was found in the first backreference.  In this example it will find a "C" at the beginning and search again for a "C"
• ([0-9]+) find another one or more digits and store it in a backreference

I'm only using one of the backreferences, but the others are so I can expand the node and get at each of them (in order of appearance in the regexp).