blob: cc24e97778e2f48f1e6216ab866ecda0b78c6cd6 (
plain) (
blame)
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
=begin rdoc
= Ruby on Rails Core Extensions
provides .blank?
=end
unless Object.respond_to?(:blank?) #:nodoc:
# Check first to see if we are in a Rails environment, no need to
# define these methods if we are
class Object
# An object is blank if it's nil, empty, or a whitespace string.
# For example, "", " ", nil, [], and {} are blank.
#
# This simplifies
# if !address.nil? && !address.empty?
# to
# if !address.blank?
def blank?
if respond_to?(:empty?) && respond_to?(:strip)
empty? or strip.empty?
elsif respond_to?(:empty?)
empty?
else
!self
end
end
end
class NilClass #:nodoc:
def blank?
true
end
end
class FalseClass #:nodoc:
def blank?
true
end
end
class TrueClass #:nodoc:
def blank?
false
end
end
class Array #:nodoc:
alias_method :blank?, :empty?
end
class Hash #:nodoc:
alias_method :blank?, :empty?
end
class String #:nodoc:
def blank?
empty? || strip.empty?
end
end
class Numeric #:nodoc:
def blank?
false
end
end
end
|
