lua_protocols/enum.lua at master · johnfoconnor/lua_protocols · GitHub

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localEnum= {}
Enum.__index=Enum

functionEnum.count(enumerable)
Enumerable.is_defined_for(enumerable)
localreducer=function(x, acc)
return"cont", acc+1
end
localresult, count=enumerable:reduce(reducer, "cont", 0)
returncount
end

functionEnum.foldl(enumerable, acc, fun)
Enumerable.is_defined_for(enumerable)
localreducer=function(x, acc)
return"cont", fun(x, acc)
end
localresult, value=enumerable:reduce(reducer, "cont", acc)
print(result, value)
returnvalue
end

localinto=function(enumerable, initial, fun, callback)
localvalue=Enum.foldl(enumerable, initial, callback)
returnfun(value, "done")
end

functionEnum.into(enumerable, collectable, fun)
Enumerable.is_defined_for(enumerable)
Collectable.is_defined_for(collectable)
localinitial, collectable_fun=collectable:into()
localcallback=function(x, acc)
returncollectable_fun(acc, "cont", fun(x))
end
returninto(enumerable, initial, collectable_fun, callback)
end


returnEnum