How to remove spaces between numbers in Notepad++?

Question

Regular Expressions

There is a base with numbers like:
12345 67
12345 68
12345 69
I find a space (\d\s) , but I can’t replace (\d) - the number before the space is overwritten...

Answer 1

You have strange notions about regular expression syntax.
You need to search (\d)\s(\d)and replace with $1$2.
Your code, on the other hand, looks for a digit followed by a space (not a space between digits, so a space at the end of the line also matches the pattern) and captures this pair in the capture group. And replaces simply with the letter "d" (the brackets and the symbol "\" in this expression are devoid of syntactic meaning).

Answer 2

B find (\s)(\d+)
B replace $2