ForNext
Only Do What Only You Can Do
093. iteration
Hyperpolyglot Interpreted Languages: Tcl, Lua, JavaScript, Io より (2012.05.08)
JavaScript
for (var k in d) { use k or d[k] }
Lua
for k,v in pairs(d) do use k or v end
Io
d foreach(k, v, k println v println )