Can I set cursor position in vim mapping?

Question

Is there a way to set the cursor position for a mapping? For example:

nmap erb; <%= %>

I want to set the cursor after the equals sign. Can this be done?

Answer 1

I am assuming you want this mapping to insert "<%= =>", so try something like this:

:nmap erb; i<%= =><esc>hh

Answer 2

inoremap erb; <%= %><left><left><left>
nnoremap erb; a<%= %><left><left><left>

Shall do it.

NB: there exist several plugins that help defining such mappings. For instance, with lh-brackets, the definition would be done with:

Brackets <%= \ %> -trigger=erb;