I need regular expression to select whitespaces excluding whitespaces after prepositions (or short words, 1-3 char).

Example: Namesti I. P. Pavlova

only selected whitespace will be after word "Namesti".

CodePudding user response：

You can use a lookback.
I have only put a point in the look back. You could add comma, colon, semi-colon etc. if needed.

((?<![.])\s)

see https://regex101.com/r/7MLjkh/1

CodePudding user response：

If we want the space to follow a minimum of 4 letters we can use

((?<=[a-zA-Z]{4})\s)

See https://regex101.com/r/Tlp2xS/1

If numbers are also accepted

((?<=[a-zA-Z0-9]{4})\s)

Or the shorter pattern

((?<=\w{4})\s)

Test to see what suits your needs because you have only given one sample string so there may be edge cases you haven't mentioned.