Sublime Text 2: How to delete blank/empty lines

Question

Let\'s say I had a text file with the following nine lines:

foo

bar

baz

qux

quux

How can I use Sublime Text 2 to remove all four of the

Answer 1

Sublime Text 2 & 3

The Comments of @crates work for me,

Step 1: Simply press on ctrl+H

Step 2: press on RegEX key

Step 3: write this in the Find: ^[\s]*?[\n\r]+

Step 4: replace all