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Those notes are meant for those who already know vi/vim.
Vis is a modal editor inspired by both vi(m) and sam. Basically it's vi with ex
replaced by sam regexes.
Vis doesn't have a proper tutorial, to learn it you have to read its help and
manpage. There is a video demonstration on ascii I find it quite inconvienant,
I prefer to learn by pratice.
It is recommanded to download this gmi file, so you can open it in vis.
In this part you'll learn a few ways to use sam regexes within vis.
To avoid messing up with the text I recommand selecting lines in visual
mode so that the command is only applied to the selection.
You can do a substitution like so :
:x/pattern/ c/replacement/<Enter>
which is the equivalent in vi/ex to :
:s/pattern/replacement/
Try it out by replacing "thee" by "the" in the following text :
thee best time to see thee flowers is in thee spring.
Now let's decompose what we just did :
Those two commands are independant try to do this :
As you might have noticed, when executing the x command you switched to visual
mode.
So as a third way to substitute text you can first select the text with x, and then
use the vi command c.
add the missing letters in the next line (example : x/ext/ i/t/)
this ext, is missin a few letter
Warning : if you want to do the same with vi command you have to first press
<Escape> to get back to insert mode, you'll have a cursor placed at the beginning
of each selection.
The d command is used for deleting selection.
Delete every comma in the example
by using the following command
x/,/d<Enter>
note that you can seperate commands with spaces :
x/,/ d<Enter>
Example :
This, text, has, a, lot, of, commas.