Vim: delete sentences and paragraphs via Text Objects

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Vim reduces the strain on your eyes

An unbelievable feature of Vim is the ability to perform operations within entire blocks of text called “Text Objects”, such as words, sentences and paragraphs, regardless of the cursor position inside the objects.

This means you can place the cursor randomly within the blocks and reduce the strain of your eyes towards the monitor.

Sentence and paragraph deletion operations provide an excellent way to understand how these feature works.

Sentences and paragraphs

Vim has a detailed definition of sentences and paragraphs.

Here are the technical definitions (from the official manual):

A sentence is defined as ending at a '.', '!' or '?' followed by either the end of a line, or by a space or tab.

A paragraph begins after each empty line.

The text object symbol for a sentence is the s character. For a paragraph is the p character.

If you want to perform operations involving the entire block of text regardless of the position of the cursor you must add the character i(inner o inside the object) or a (around the object).

The possible constructs are as follows:

Text objMeaning
isinside a sentence
asaround a sentence
ipinside a paragraph
aparound a paragraph

What´s the difference between inside and around? The white spaces.

  • i leaves white spaces after the subject unchanged]{#8e2c}
  • a extends the operation by including any white space up to the next object]{#39bc}

To perform the operations you only need to add the commands such as d(elete) c(hange) or y(ank, copy).

Here is the list of command combinations to delete a text object:

disdelete inside a sentence
dasdelete around a sentence
dipdelete inside a paragraph
dapdelete around a paragraph

You can also double or multiply the effect by preceding it with a number, e.g. 2dap.

The same operation can be, of course, applied to the other commands.

Examples with animations

The following GIF animations are created with Screenkey and Peek in Arch Linux operating system (remember that the cursor can be anywhere within the text block, not necessarily at the beginning).

Here is the result after entering the combination dis: note the white spaces after the deletion of the FIRST sentence.

Here is the result for das: now every white space after the FIRST sentence is deleted.

And now the result for dip: note the three blank lines after the deletion of the first paragraph.

Finally, here is the result for dap: every blank line after the first paragraph is deleted and the focus is pointed on the second paragraph.

By using Text Objects in Vim you can really save a lot of time and some of your eyes!

Thank you for your attention.

Originally published ad Medium


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