end
function array_base.filter(outa, ina, func)
- for k,v in ipairs(ina) do
+ local inplace, start_length = ina == outa, #ina;
+ local write = 1;
+ for read=1,start_length do
+ local v = ina[read];
if func(v) then
- outa:push(v);
+ outa[write] = v;
+ write = write + 1;
+ end
+ end
+
+ if inplace and write < start_length then
+ for i=write,start_length do
+ outa[i] = nil;
end
end
+
return outa;
end