GIMP Version: 2.8.16
Operating System: Windows
GIMP Experience: Basic Level

List any relevant plug-ins or scripts:
pdb.gimp_gradients_get_list (names_filter)

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Hi gurus.
So far I used sometimes the above statement to get a list of all gradients matching the "names_filter" as the beginning string.
For instance:
- I enter in the names_filter the string "MyGrad" and I get the whole list of all gradients with the name starting with "MyGrad" (MyGrad_01, MyGrad_02, MyGradwhatsoever, ..).
Assuming I want to select not based on the initial substring, but based on a substring inside the names, for instance, just to remain in the example, all gradients which contain in their name the substring "Grad", is there a way to put in front a "placeholder" character (like *Grad, or _Grad or I don't know...) to filter them?
(I mentioned those two characters because I did try and do not work: is there a way?)
Thanks a lot

The filter is a "regular expression", so you can't just use *

Here I've specified I want to match zero or more characters in front of "tract"

Whereas here:I'm matching the same as above, but only those with numbers in the range 2 -> 3

Good luck learning how to use regular expressions

Kevin

More examples:

Containing the string "flag":

"flag" must be the end of the name


Contains either "Yellow" or "Green":

Thanks Kevin. Very quick and effective solution.
I didn't understand the term "regular expression" so far.
Where is this term defined?
Where can I learn "how to use regular expressions"?
Or even better what does "regular expression" mean? (in terms of Gimp?

thanks for the examples...
so if I had used simply Grad not necessarily (as I tought) should "Grad" be the initial string....and I get what I want ! Excellent.

Regular expression is a term used in most computer languages. It's used for pattern matching in strings.

Apparently in Italian it's Espressione regolare

Kevin

If you want to force it to only match Grad at the start of the string, you prefix it with ^

Yellow only at the start:


Yellow anywhere:


Also, rather unexpectedly, GIMP doesn't seem to be case-sensitive.

Kevin

Thanks, I will have a look.
So far a regular expression for me was something like:
<xxx for less than xxx
>abc for greater than abc
=153 for equal to 153
etc.
Very basic arithmetical expressions....
I was used also to the wild character * to say any character...(or _ to say one char)
so that to search something containing the string "abcde" I would have tought at:
*abcde*
Never too old to learn....
Thanks

oh, not case sensitive, interesting...