Notepad++ search with a logical AND

Question

Using Notepad++ I need to find lines that would contain 2 keywords (both).

I've found how to combine 2 regex with a logical 'or' operator.

Example: (searchword1)|(searchword2)

But how do I combine with logical 'and'?

Tried &, &&.. no success.

Example of input:

The CAT goes up and down the ROAD.
The CAT goes up and down the CITY.

Search words: CAT & ROAD

Expected result: line1

Solution 1

Find -> Regular expression, then type

(CAT)(.*?)(ROAD)

Solution 2

If you are looking for a true && operation where a line contains both words in any order then you will want to match both of these lines:

The CAT goes up and down the ROAD.

The ROAD goes up and down the CAT. (poor cat)

In this case you will want to use:

^(?=.*\bCAT\b)(?=.*\bROAD\b).*$

Explanation:

• ^ start line
• $ end line
• ?= positive look ahead
• \b word boundary. Not sure if you want this or not. Remove these if you want to match any part of word, e.g. TheCATgoes up and down theROAD.

(?=) is a positive look ahead. We have two such look aheads, one for anything (*) followed by CAT and one for anything (*) followed by ROAD. There is an implied && between the two lookaheads - both conditions must be satisfied.

Read up on lookarounds here