That sounds interesting but is hard to search for, have you got an example?
http://srfi.schemers.org/srfi-119/srfi-119.html
EDIT: To elaborate on my `quote do:`, this is a little macro to avoid doing many tedious code repetitions:
macro strp(sVars: varargs[untyped]): untyped =
result = newStmtList() # strip some string vars; Assume new-scope
for sV in sVars: result.add(quote do: (let `sV` = `sV`.strip))
strp sTm,sUs,sSy,sUt,sRS,sIn,sOu,mjF,mnF,swp,vsw,isw,isr,ixr,idr,nsg,msn,mrc
let sTm = sTm.strip
let sUs = sUs.strip
...
The static typing of Nim (rather than gradual typing defaults like Lisp or Cython) tends to make beginner programs less "performance cringe" (as long as they compile with `-d:release -d:lto`!).
As someone who loves both Lisp and Pascal, I really need to revisit Nim.