I am using Ruby on Rails 3.1.0 and I would like to validate a class attribute just to avoid to store in the database a string containing these characters: (blank space), <, >, ", #, %, {, }, |, , ^, ~, [, ] and ```.
www.un.org/Depts/DGACM/index_spanish.htm The regex?
假设:
^[^] ><"#%{}|\^~[`]+$
由于有人否认这一点,这里有一些检验守则:
ary = [ , < , > , " , # , % , { , } , | , \ , ^ , ~ , [ , ] , ` , a ]
ary.each do |i|
puts i =~ /^[^] ><"#%{}|\^~[`]+$/
end
产出:
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
0
bad_chars = %w(< > " # % { } | ^ ~ [ ] )
re = Regexp.union(bad_chars)
p %q(hoh oho) =~ re #=> 3
<>Regexp.union 照顾家庭。
a = "foobar"
b = "foo ` bar"
re = /[ ^<>"#%{}|\~[]`]/
a =~ re # => nil
b =~ re # => 3
The inverse expression is:
/A[^ ^<>"#%{}|\~[]`]+/
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