Ok I must have missed something vital here. Can someone please tell me what the difference between using "a and @a is? All I know is that @ is used together with let and e.g. echo and ” is used when pasting. However I find no sources that explains the difference and what the prefix mean.
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Note: all of the following information (and much more) can be found using :help @, :help ", and :help let-@.
"ap,"ad, &c.: use registerain a put from or delete to.@a: replay the contents of registeraas a sequence of normal commands:let @a = 'string': assign a string to register a.
Now, there is likely some confusion because @ and " are occasionally interchangeable:
""p,"@p,p: put from register", this is called the "unnamed register," but in fact it has at least two names,"and@.@": replay the contents of register"as a normal command (this is rarely done).@@: replay the previously used@{reg}.
Then, there are the let and expression usages:
:let @" = 'string':let @@ = 'string': assign a string to register".:echo @@,:echo @": echo the value of register":echo @: also echo the value of register".:echo "@,:echo ": syntax error.
Finally, you can execute registers as an ex command (i.e., cmdline mode),
:@a: execute contents of registeraas an ex command.:@:: execute the previous command line:@@: execute the previous:@{reg}.
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@BLayer Good point, although I can't remember the last time I needed to use them – Mass Jun 2 '18 at 1:43
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Cool. I actually use it quite a bit. For instance, I might be doing some quick hacking on a function or mapping...make a change, yank it (
yaporyyor whatever) and load/reload with:@0. – B Layer Jun 2 '18 at 4:41
