How to conceal or hide some lines in vim, instead of folding them?

https://vi.stackexchange.com/questions/5533/hide-certain-lines-completely-not-folding

Removing all lines containing a string in vi

Removing all lines containing a string in vi

How to change multiple rows into one row in vim?

How to change multiple rows into one row in vim?

Check how many rows are there totally (e.g. 50)

50J

How to change a one-row text into multiple rows in vim?

How to change a one-row text into multiple rows in vim?

:%s/; /\r/g

The above command replaces '; ' with \r (carriage return)

How to append some text to each row in vim?

How to append some text to each row in vim?

:%s/$/,/g

How to remove duplicate rows in vim?

How to remove duplicate rows in vim?

:sort u