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Asked: 2026-05-30T16:57:59+00:00

Let us say I have a list such as : Foo : 1st chapter

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Let us say I have a list such as :

Foo : 1st chapter
Foo : 2nd chapter
Bar : 1st chapter
Bar : 2nd chapter
Bar : 3rd chapter
Qux : 1st chapter

I want to insert a blank line (except before the first line, of course) each time a line begins with a different pattern (here 3 letters, but it could be 4-digit years : 2010, 2011, 2012, etc…) in order to have :

Foo : 1st chapter
Foo : 2nd chapter

Bar : 1st chapter
Bar : 2nd chapter
Bar : 3rd chapter

Qux : 1st chapter

How should I proceed ? Thanks in advance…

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1 Answer

  1. Editorial Team
    :let x='Foo' | g/^/ let y=split(getline('.'))[0] | if x!=y | s/^/\r/ | let x=y | endif

    For simplicity: You can let x='' then :1d

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