Delete every other row

[garytvh]

How can I delete every other row in a large text file?

[ben_josephs]

Use "Posix" regular expression syntax:

Configure | Preferences | Editor

[X] Use POSIX regular expression syntax

Search | Replace... (<F8>):

Find what: (.*)\n.*\n
Replace with: \1\n

[X] Regular expression

Replace All

or, if you want the other ones,

Find what: .*\n(.*)\n
Replace with: \1\n

[X] Regular expression

Replace All