How to sparse a string like:
suppose input is str=“1223”
I want str_a=[“1”,“22”,“3”]
How can I get str_a from str?
On 10/02/2012 10:32 AM, ajay paswan wrote:
How to sparse a string like:
suppose input is str=“1223”
I want str_a=[“1”,“22”,“3”]
How can I get str_a from str?
1.9.3p125 :002 > str.scan /\d+</a>/
=> [“1”, “22”, “3”]
Sam
Sam D. wrote in post #1078251:
On 10/02/2012 10:32 AM, ajay paswan wrote:
How to sparse a string like:
suppose input is str=“1223”
I want str_a=[“1”,“22”,“3”]
How can I get str_a from str?1.9.3p125 :002 > str.scan /\d+</a>/
=> [“1”, “22”, “3”]Sam
On 10/02/2012 10:58 AM, ajay paswan wrote:
1.9.3p125 :002 > str.scan /[[:alnum:]]+</a>/
=> [“kl1”, “22ik”, “3o”]
Ping pong
I think perhaps you should read up on regular expressions in Ruby =]
Sam
Sam D. wrote in post #1078254:
On 10/02/2012 10:58 AM, ajay paswan wrote:
1.9.3p125 :002 > str.scan /[[:alnum:]]+</a>/
=> [“kl1”, “22ik”, “3o”]Ping pong
I think perhaps you should read up on regular expressions in Ruby =]
Sam
I have gone through it previously but could not figure it out, is ‘.’
denotes any character?
On 10/02/2012 11:11 AM, ajay paswan wrote:
I think perhaps you should read up on regular expressions in Ruby =]
Sam
I have gone through it previously but could not figure it out, is ‘.’
denotes any character?
There are at least three articles on the Internet about regular
expressions. Have a hunt for one that makes sense to you specifically =]
Sam
On Mon, Oct 1, 2012 at 11:32 PM, ajay paswan [email protected]
wrote:
How to sparse a string like:
suppose input is str=“1223”
I want str_a=[“1”,“22”,“3”]
How can I get str_a from str?
I’d use a proper XML or HTML processing tool for that. Then you can
search with XPath ‘//a’.
$ irb19 -r nokogiri
irb(main):001:0> str = “1223”
=> “1223”
irb(main):004:0> dom = Nokogiri.HTML str
=> #<Nokogiri::HTML::Document:0x439c00c name=“document”
children=[#<Nokogiri::XML::DTD:0x439bdd2 name=“html”>,
#<Nokogiri::XML::Element:0x439b940 name=“html”
children=[#<Nokogiri::XML::Element:0x439b80a name=“body”
children=[#<Nokogiri::XML::Element:0x439b6b6 name=“a”
children=[#<Nokogiri::XML::Text:0x439b53a “1”>]>,
#<Nokogiri::XML::Element:0x439b3be name=“a”
children=[#<Nokogiri::XML::Text:0x439b27e “22”>]>,
#<Nokogiri::XML::Element:0x439b152 name=“a”
children=[#<Nokogiri::XML::Text:0x439b030 “3”>]>]>]>]>
irb(main):005:0> str_a = dom.xpath ‘//a’
=> [#<Nokogiri::XML::Element:0x439b6b6 name=“a”
children=[#<Nokogiri::XML::Text:0x439b53a “1”>]>,
#<Nokogiri::XML::Element:0x439b3be name=“a”
children=[#<Nokogiri::XML::Text:0x439b27e “22”>]>,
#<Nokogiri::XML::Element:0x439b152 name=“a”
children=[#<Nokogiri::XML::Text:0x439b030 “3”>]>]
irb(main):006:0> str_a.size
=> 3
Kind regards
robert5
On Oct 1, 2012, at 15:11 , ajay paswan [email protected] wrote:
I think perhaps you should read up on regular expressions in Ruby =]
Sam
I have gone through it previously but could not figure it out, is ‘.’
denotes any character?
ajay paswan wrote in post #1078256:
Sam D. wrote in post #1078254:
On 10/02/2012 10:58 AM, ajay paswan wrote:
1.9.3p125 :002 > str.scan /[[:alnum:]]+</a>/
=> [“kl1”, “22ik”, “3o”]Ping pong
I think perhaps you should read up on regular expressions in Ruby =]
Sam
I have gone through it previously but could not figure it out, is ‘.’
denotes any character?
Yes, and .* means zero or more times of any character, so you might
think of .* to match an open tag, followed by any text, followed
by a closing tag.
However this won’t work the way you expect, because .* will match the
largest amount of text it can while still matching the rest of the
pattern.
str.scan /.*</a>/
=> [“kl122ik3o”]
That is: the opening tag is , the content is kl122ik3o,
and the closing tag is . You probably hadn’t thought of it like that
You can fix this using .*?, which will consume the smallest amount of
text it can while still matching the rest of the pattern.
str.scan /.*?</a>/
=> [“kl1”, “22ik”, “3o”]
But as has been pointed out, regular expressions are not the right way
to parse XML. Use a library specifically designed for XML parsing.