How do I visual select a calculation backwards?

Question

I would like to visual select backwards a calculation p.e.

200 + 3 This is my text -300 +2 + (9*3)
                        |-------------|*

This is text 0,2         


        

Answer 1

This seems quite a complicated task after all to achieve with regex, so if you can avoid it in any way, try to do so.

I've created a regex that works for a few examples - give it a try and see if it does the trick:

^(?:[A-Za-z]|\s)+((?:[^A-Za-z]+)?(?:log|sqrt|abs|round|ceil|floor|sin|cos|tan)[^A-Za-z]+)(?:[A-Za-z]|\s)*$

The part that you are interested in should be in the first matching group.

Let me know if you need an explanation.

EDIT:

^ - match the beginning of a line

(?:[A-Za-z]|\s)+ - match everything that's a letter or a space once or more

match and capture the following 3:
((?:[^A-Za-z]+)? - match everything that's NOT a letter (i.e. in your case numbers or operators)

(?:log|sqrt|abs|round|ceil|floor|sin|cos|tan) - match one of your keywords

[^A-Za-z]+) - match everything that's NOT a letter (i.e. in your case numbers or operators)

(?:[A-Za-z]|\s)* - match everything that's a letter or a space zero or more times

$ - match the end of the line