Rails ERB <%- ... -%> vs. <% ... %> [duplicate]

Question

Possible Duplicate:
Difference between -%> and %> in rails

So for an ERB file, what's the difference between <%- ... -%> vs. <% ... %>? As far as I can tell, they serve the same purpose but one requires more typing than the other.

Answer 1

Using the dash removes the whitespace around the ERB tag, there is a RailsCast that talks about this and some other View tricks.