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-rw-r--r--lua.html.markdown15
1 files changed, 11 insertions, 4 deletions
diff --git a/lua.html.markdown b/lua.html.markdown
index 7325a1cf..369de908 100644
--- a/lua.html.markdown
+++ b/lua.html.markdown
@@ -125,6 +125,9 @@ f = function (x) return x * x end
-- And so are these:
local function g(x) return math.sin(x) end
+local g = function(x) return math.xin(x) end
+-- Equivalent to local function g(x)..., except referring
+-- to g in the function body won't work as expected.
local g; g = function (x) return math.sin(x) end
-- the 'local g' decl makes g-self-references ok.
@@ -133,6 +136,10 @@ local g; g = function (x) return math.sin(x) end
-- Calls with one string param don't need parens:
print 'hello' -- Works fine.
+-- Calls with one table param don't need parens
+-- either (more on tables below):
+print {} -- Works fine too.
+
----------------------------------------------------
-- 3. Tables.
@@ -203,7 +210,7 @@ f2 = {a = 2, b = 3}
metafraction = {}
function metafraction.__add(f1, f2)
- sum = {}
+ local sum = {}
sum.b = f1.b * f2.b
sum.a = f1.a * f2.b + f2.a * f1.b
return sum
@@ -266,7 +273,7 @@ eatenBy = myFavs.animal -- works! thanks, metatable
Dog = {} -- 1.
function Dog:new() -- 2.
- newObj = {sound = 'woof'} -- 3.
+ local newObj = {sound = 'woof'} -- 3.
self.__index = self -- 4.
return setmetatable(newObj, self) -- 5.
end
@@ -301,7 +308,7 @@ mrDog:makeSound() -- 'I say woof' -- 8.
LoudDog = Dog:new() -- 1.
function LoudDog:makeSound()
- s = self.sound .. ' ' -- 2.
+ local s = self.sound .. ' ' -- 2.
print(s .. s .. s)
end
@@ -322,7 +329,7 @@ seymour:makeSound() -- 'woof woof woof' -- 4.
-- If needed, a subclass's new() is like the base's:
function LoudDog:new()
- newObj = {}
+ local newObj = {}
-- set up newObj
self.__index = self
return setmetatable(newObj, self)