# HG changeset patch
# User jbe
# Date 1408531653 -7200
# Node ID ed7a82f85e6fdada924e48dbec02d92e4f8fde81
# Parent  2fad7f50076bf304cee8dc421866b52495787bb7
Modified filter example in seqlua_ipairs_example.lua: avoid closure creation in for-loop invocation

diff -r 2fad7f50076b -r ed7a82f85e6f seqlua_ipairs_example.lua
--- a/seqlua_ipairs_example.lua	Wed Aug 20 12:23:31 2014 +0200
+++ b/seqlua_ipairs_example.lua	Wed Aug 20 12:47:33 2014 +0200
@@ -71,13 +71,13 @@
 --  4   Person #2
 --  5   Person #3
 
-function filter(f, iter, iter_s, iter_i)
-  return coroutine.wrap(function()
-    for i, v in ipairs(iter, iter_s, iter_i) do f(v) end
+function create_filter(f)
+  return coroutine.wrap(function(...)
+    for i, v in ipairs(...) do f(v) end
   end)
 end
 
-function filterfunc(v)
+my_filter = create_filter(function(v)
   local type_v = type(v)
   if type_v == "string" then
     coroutine.yield(v)
@@ -86,9 +86,9 @@
       coroutine.yield(true)
     end
   end
-end
+end)
 
-for v in filter(filterfunc, {"a", "b", 3, "c"}) do
+for v in my_filter, {"a", "b", 3, "c"} do  -- no closure is created
   print(v)
 end
 -- prints: