Method Dispatch

Pick behavior from an action name the way a method dispatcher would.

method_dispatch.lua

local action = 
local label = "unknown"
if action == "open" then
    label = "opening"
end
if action == "close" then
    label = "closing"
end
if action == "pause" then
    label = "paused"
end
local message = ({action = action, label = label}).action .. ":" .. ({action = action, label = label}).label
print("action=" .. action)
print("message=" .. message)

local action = 
local label = "unknown"
if action == "open" then
    label = "opening"
end
if action == "close" then
    label = "closing"
end
if action == "pause" then
    label = "paused"
end
local message = ({action = action, label = label}).action .. ":" .. ({action = action, label = label}).label
print("action=" .. action)
print("message=" .. message)

local action = 
local label = "unknown"
if action == "open" then
    label = "opening"
end
if action == "close" then
    label = "closing"
end
if action == "pause" then
    label = "paused"
end
local message = ({action = action, label = label}).action .. ":" .. ({action = action, label = label}).label
print("action=" .. action)
print("message=" .. message)

method dispatch Object methods often select behavior from an action name and the object's current fields.