TIL: :sort in vim

vim has a built-in sorting function. Specify a range or a visual selection and run :sort in command mode to sort the given lines. You can also do things like:

:sort! to invert the order.
:sort i to ignore case.
:sort u to deduplicate the lines.
:sort n or :sort f for integer or float numeric sorting; in particular, these will sort by the first number on each line.
:sort /pattern/ to ignore a pattern and :sort /pattern/ r to sort based on pattern.

References

“Sorting text”
“A Vim Guide for Advanced Users”, “Sorting Text”