-
var a = { name: 'a'}
var b = a
b.name = 'b'
a.name = 'b'
|
Stack |
Heap |
| a |
ADDR 101 |
101:name:'a' -> 'b' |
| b |
ADDR 101 |
|
-
var a = 1
var b = a
b = 2
a = 1
-
var a = { name: 'a'}
var b = a
b ={name: 'b'}
a .name= 'a'
|
Stack |
Heap |
| a |
ADDR 101 |
101:name:'a' -> 'b' |
| b |
ADDR 101 -> 102 |
102:name:'b' |
-
var a = { name: 'a'}
var b = a
b =null
a .name= 'a'
|
Stack |
Heap |
| a |
ADDR 101 |
101:name:'a' -> 'b' |
| b |
ADDR 101 -> null |
|
-
var a = {}
a.self = a
a.self.self.self=?
|
Stack |
Heap |
| a |
ADDR 101 |
101:name:'a' -> 'b' + self:ADDR 101 |
-
var a = {n:1}
var b = a
a.x = a = {n: 2}
alert(a.x);// --> undefined
alert(b.x);// --> [object Object]
|
Stack |
Heap |
| a |
ADDR 101 ->102 |
101:n:1 + ADDR102 |
| b |
ADDR 101 |
102:n:2 |
7.垃圾回收
var a = {name: 'a '}
var b = {name: 'b'}
a = b
|
Stack |
Heap |
| a |
ADDR 101 ->102 |
101:name: 'a' ->垃圾回收 |
| b |
ADDR 102 |
102:name:'b' |
参考教程饥人谷
