fetch

-- Sample program to demonstrate some possible programming techniques

usage = "usage: fetch <itemName>"

-- Array of items/blocks: name, x, z
-- Pretend this array has hundreds of entries

items = {
			{"cobblestone", 4, 6},
			{"dirt", 4, 7},
			{"sand", 4, 8},
			{"gravel", 4, 9},

			{"gold_ore", 5, 6},
			{"iron_ore", 5, 7},
			{"coal_ore", 5, 8},
			{"oak_wood", 5, 9},

			{"lapis_ore", 6, 6},
			{"sandstone", 6, 7},
			{"diamond_ore", 6, 8},
			{"redstone_ore", 6, 9},

			{"cactus", 7, 6},
			{"clay_block", 7, 7},
			{"sugar_cane", 7, 8},
			{"pumpkin", 7, 9},
		}

-- getIndex: Return the array index of the entry containing <name>

function getIndex(name)
	rv = 0		-- return value
	nItems = #items
	print("nItems = ", nItems)

	for i= 1,nItems do
		if name == items[i][1] then
			rv = i
			break
		end
	end

	return(rv)
end


-- Main Program

args = {...}
nArgs = #args

if nArgs ~= 1 then
	print(usage)
	return
end

itemName = args[1]
index = getIndex(itemName)
if index == 0 then
	print("Can't find \"", itemName, "\"")
else
	item = items[index]
	x = item[2]
	z = item[3]

	print("The ", itemName, " chest is at ", x, ", ", z)
end