Merging Blocks

Your problem with Vim is that you don't grok vi was an e-book distributed as a Stack Overflow answer. You probably saw it crop up on Hacker News a year or so ago. As a result of this tour de force in web comments I now keep track of interesting Stack Overflow questions and answers.

A recent find that intrigued me was about merging multiple lines:

If you want to do this with just Ex commands

:5,8del | let l=split(@") | 1,4s/$/\=remove(l,0)/

In Vim, you can use the pipe character (|) to chain multiple Ex commands, so the above is equivalent to

:let l=split(@")

Many Ex commands accept a range of lines as a prefix argument - in the above case the 5,8 before the del and the 1,4 before the s/// specify which lines the commands operate on.

The discussion after the answer is also quite enlightening, and it has garnered 803 upvotes so far.

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