Improved Iteration
Pluto improves iteration in a few ways.
Generalized Iteration
It's redundant to call the pairs
function for simple iteration. This action is now optional, and handled by the virtual machine if the function is absent.
New Code
local t = { 1, 2, 3, "hello", "world" }
for key, value in t do
print(key, value)
end
When you omit the function from the loop preparation, pairs
is implicitly inserted. So, that code is identical to this:
Old Code
local t = { 1, 2, 3, "hello", "world" }
for key, value in pairs(t) do
print(key, value)
end
This is compatible with for-loop optimizations.
caution
The bytecode of this feature is not backwards-compatible with Lua.