~ / operators / case-and-indentlesson 7/7

Case, indent and replace: gU, gu, >, < and r

More operators for any motion, plus one-character fixes with ~ and r.

?how it works

These are operators too, so they take a motion just like d and c:

gU makes text UPPERCASE and gu makes it lowercase
g~ swaps the case of each letter
> shifts lines one indent to the right and < to the left (empty lines stay empty)
= re-indents lines using the file type's indent rules

Double them to act on the current line: gUU, guu, g~~, >>, << and ==. With a count, 3>> shifts three lines, and >j shifts this line and the next.

Two quick fixes that are not operators: ~ toggles the case of the character under the cursor and moves right, and r followed by a character replaces the one under the cursor without entering Insert mode. 5rx replaces five characters with x.

⌨keys

`gU{motion}`	make uppercase
`gu{motion}`	make lowercase
`g~{motion}`	swap case
`gUU`	uppercase the line (guu, g~~ likewise)
`>{motion}`	shift lines right
`<{motion}`	shift lines left
`>>`	shift the line right (<< shifts left)
`={motion}`	re-indent lines (== for one line)
`~`	toggle the case of one character and move right
`r{char}`	replace the character under the cursor

4 drills

SHOUT one word: Make the word under the cursor uppercase with gU and a motion.
SHOUT the whole line: Uppercase the entire line. The cursor can stay where it is.
Indent a block: Indent the lines that belong inside the block by one level (see the target).
Fix one character with r: Replace the character under the cursor so the line matches the target.

The drill editor loads in your browser.