how to remove empty lines in notepad code example

Example 1: notepad++ remove empty lines

; set Search Mode to reg ex
Find:^\h*\R
Replace: ""

Example 2: remove new lines notepad++

// find and replace with the following in find and keep replace blank
// seearch mode should have 'Extended' selected
// either:
//  	- \r\n
//  	- \r
//  	- \n