1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
alias $foo $bar
p defined? $foo
p defined? $bar
$bar = nil
p defined? $foo
p defined? $bar
$bar = 1
p defined? $foo
p defined? $bar
puts $foo
p defined? $foo
p defined? $bar
alias $foo2 $bar2
$foo2 = 2
puts $bar2
puts '-0-'
p defined? $-a
alias $dasha $-a
p defined? $dasha
puts '-1-'
p defined? $-
alias $dash $-
p defined? $dash
puts '-2-'
p defined? $+
alias $plus1 $+
p defined? $plus1
puts '-3-'
"x" =~ /(x)/
p defined? $+
alias $plus2 $+
p defined? $plus2 # doesn't go thru alias, but the difference is only in 1.8
|
