Search for multiple strings in several files with Sublime 3 using AND

Question

This previous (similar) question of mine Search for multiple strings in several files with Sublime 3 was answered with a way to search for multiple strings in multiple files in SublimeText, using the regex OR operator:

Find: (string1|string2)
Where: <open folders>

This works perfectly for searching files where either string1 OR string2 is present. What I need now is to search in lots of files for both strings present. I.e., I need to use the AND operator.

I looked around this question Regular Expressions: Is there an AND operator? and also this one Regex AND operator and came up with the following recipes:

(?=string1)(?=string2)
(?=.*string1)(?=.*string2)
(string1 string2)
(string1\&string2)

but none of them work.

So the question is: how can I search multiple strings in several files at once with SublimeText?

(I'm using SublimeText 3103)

Add: the strings are not necessarily in the same line. They can be located anywhere within each file. For example, this file:

string1 dfgdfg d dfgdf

sadasd
asdasd

dfgdfg string2 dfgdfg

should trigger a match.

Answer 1

Open sublime Text and press

Shift+Ctrl+F

or click on the Find in Files options under Files tab. The above is keyboard shortcut for this option. When you press above key, these are following options

When you select ... button from above, you get 6 options which are Add Folder or Add Open Files or Add Open Folders

To search strings that occur in the same line

Use the following regex for your and operation

(?=.*string1)(?=.*string2)

I am using the following regex

(?=.*def)(?=.*s)\w+ <-- \w+ will help in understanding which line is matched(will see later)

and I am searching within current open files

Make sure the Use Buffer option is enabled (one just before Find). It will display the matches in a new file. Also make sure the Show Context (one just before Use Buffer) option is enabled. This will display the exact line that matches. Now Click on Find on the right side.

Here is the output I am getting

See the difference in background color of line 1315 and 1316(appearing in left side). 1316 is matched line in designation file

This is the image of last part

There were total 6 files that were opened while I used this regex

For finding strings anywhere in file

Use

(?=[\s\S]*string1)(?=[\s\S]*string2)[\s\S]+

but it will kill sublime if number of lines increases.

If there are only two words that you need to find, the following will work super fast in comparison to above

(\bstring1\b[\S\s]*\bstring2\b)|(\bstring2\b[\S\s]*\bstring1\b)