Freemarker: Dynamic interpolation of sub variables

Question

I am trying to create a FreeMarker macro that can return the interpolation of a concatenation of a string and the input variable:

<#macro findValue var>
          


        

Answer 1

In FreeMarker, foo.bar is the same as foo["bar"], but inside the [] you can have an arbitrary expression that evaluates to a string. So the expression you are looking for is simply foo[var].

BTW, what your macro tries to do is just ${foo[var]!bar[var]}