test

function isInventoryFull()
    for i=1, 16 do
        if turtle.getItemCount(i) == 0 then
            return false
        end
    end

    return true
end

-- Fixes inventory scattering.
function stackItems()
    -- Remember seen items
    m = {}

    for i=1, 16 do
        local this = turtle.getItemDetail(i)

        if this ~= nil then
            -- Slot is not empty

            local saved = m[this.name .. this.damage]

            if saved ~= nil then
                -- We've seen this item before in the inventory

                local ammount = this.count

                turtle.select(i)
                turtle.transferTo(saved.slot)

                if ammount > saved.space then
                    -- We have leftovers, and now the
                    -- saved slot is full, so we replace
                    -- it by the current one

                    saved.slot = i
                    saved.count = ammount - saved.space
                    -- Update on table.
                    m[this.name .. this.damage] = saved

                elseif ammount == saved.space then
                    -- Just delete the entry

                    m[this.name .. this.damage] = nil

                end

            else
                -- There isn't another slot with this
                -- item so far, so sign this one up.

            this.slot = i
            this.space = turtle.getItemSpace(i)

            m[this.name .. this.damage] = this

            end
        end
    end
end

function selectItem(name)
    for i=1, 16 do
        local data = turtle.getItemDetail(i)
        if data and data.name == name then
            turtle.select(i)
            return true
        end
    end
    return false
end

function getItemCount(name)
    local count = 0
    for i=1, 16 do
        local data = turtle.getItemDetail(i)
        if data and data.name == name then
            count = count + data.count
        end
    end
    return count
end

function dropThrash()
    local thrash = {"minecraft:stone", "minecraft:dirt", "minecraft:gravel", "minecraft:sand", "minecraft:cobblestone", "minecraft:sandstone", "minecraft:bedrock", "chisel:limestone", "chisel:marble", "chisel:diorite", "chisel:granite", "chisel:andesite", "harvestcraft:salt"}

    for i=1, 16 do

        details = turtle.getItemDetail(i)

        if details then

            for j=1, #thrash do
                if details.name == thrash[j] then
                    turtle.select(i)
                    turtle.drop()
                end
            end
        end
    end
end

stackItems()
dropThrash()