Ruby REGEX split, any issues with the code - ruby

Question

I am a rookie in Regex for Ruby. I read some tutorials and evaluated a piece of code.
Please let me know if I can do it in a better way.
Here is my text which needs to be split at {iwsection(*)} and {{usersection}}
t='{{iwsection(1)}}
This has some sample text 1 - line 1
This has some sample text 1 - line 2
{{iwsection(2)}}
This has some sample text 2
{{iwsection(3)}}
This has some sample text 3
{{usersection}}
This is a user section.
This has some sample text
This has some sample text'
Here is the ruby regex code I was able to manage.
t.split(/^({{[i|u][wsection]\w*...}})/)
Thank You.
The Desired Output :
A array as,
[ '{{iwsection(1)}}', 'This has some sample text 1\nThis has some sample text 1 - line 2',
'{{iwsection(2)}}', 'This has some sample text 2',
'{{iwsection(3)}}', 'This has some sample text 3',
'{{usersection}}', 'This is a user section\nThis has some sample text\nThis has some sample text.']
With this I will build a Hash,
{
'{{iwsection(1)}}' => 'This has some sample text 1\nThis has some sample text 1 - line 2',
'{{iwsection(2)}}' => 'This has some sample text 2',
'{{iwsection(3)}}' => 'This has some sample text 3',
'{{usersection}}' => 'This is a user section\nThis has some sample text\nThis has some sample text.'
}
Edit: .....
The code.
section_array = text.chomp.split(/\r\n|\n/).inject([]) do |a, v|
if v =~ /{{.*}}/
a << [v.gsub(/^{{|}}$/, ""), []]
else
a.last[1] << v
end
a
end.select{ |k, v| (k.start_with?("iwsection") || k.start_with?("usersection")) }.map{ |k, v| ["{{#{k}}}", v.join("\n")] }

Answer 1

Using String#scan:
> t.scan(/{{([^}]*)}}\r?\n(.*?)\r?(?=\n{{|\n?$)/)
=> [["iwsection(1)", "This has some sample text 1"], ["iwsection(2)", "This has some sample text 2"], ["iwsection(3)", "This has some sample text 3"], ["usersection", "This is a user section."]]
> h = t.scan(/{{([^}]*)}}\r?\n(.*?)\r?(?=\n{{|\n?$)/).to_h
=> {"iwsection(1)"=>"This has some sample text 1", "iwsection(2)"=>"This has some sample text 2", "iwsection(3)"=>"This has some sample text 3", "usersection"=>"This is a user section."}
> h.values
=> ["This has some sample text 1", "This has some sample text 2", "This has some sample text 3", "This is a user section."]
> h.keys
=> ["iwsection(1)", "iwsection(2)", "iwsection(3)", "usersection"]
> h["usersection"]
=> "This is a user section."
Update:
#!/usr/bin/env ruby
t = "{{iwsection(1)}}\nThis has some sample text 1 - line 1\nThis has some sample text 1 - line 2\n{{iwsection(2)}}\nThis has some sample text 2\n{{iwsection(3)}}\nThis has some sample text 3\nThis has some sample text\nThis has some sample text\n{{usersection}}\nThis is a user section.\nThis has some sample text\nThis has some sample text"
h = t.chomp.split(/\n/).inject([]) do |a, v|
if v =~ /{{.*}}/
a << [v.gsub(/^{{|}}$/, ""), []]
else
a.last[1] << v
end
a
end.select{ |k, v| k.start_with? "iwsection" or k === "usersection" }.map{ |k, v| [k, v.join("\n")] }.to_h
puts h.inspect
Output:
{"iwsection(1)"=>"This has some sample text 1 - line 1\nThis has some sample text 1 - line 2", "iwsection(2)"=>"This has some sample text 2", "iwsection(3)"=>"This has some sample text 3\nThis has some sample text\nThis has some sample text", "usersection"=>"This is a user section.\nThis has some sample text\nThis has some sample text"}

Answer 2

You can do that like this:
t.split(/{{iwsection\(\d+\)}}|{{usersection}}/)
#=> ["", "\n This has some sample text 1\n ",
# "\n This has some sample text 2\n ",
# "\n This has some sample text 3\n ",
# "\n This is a user section."]
That's what you asked for, but if you want to clean that up, add .map(&:strip):
t.split(/{{iwsection\(\d+\)}}|{{usersection}}/).map(&:strip).map(&:strip)
#=> ["", "This has some sample text 1", "This has some sample text 2",
# "This has some sample text 3", "This is a user section."]
You may not want the empty string at offset zero, but that's how String#split works when you are splitting on a substring that is at the beginning of the string. Suppose the string were instead:
t =
'Some text here{{iwsection(1)}}
This has some sample text 1
{{iwsection(2)}}
This has some sample text 2'
t.split(/{{iwsection\(\d+\)}}|{{usersection}}/).map(&:strip).map(&:strip)
#=> ["Some text here", "This has some sample text 1",
# "This has some sample text 2"]
Here you want "Some text here", so you can't just delete the first element of the array.
Additional requirements
To satisfied your added requirement, you could do this:
t='{{iwsection(1)}}
Text 1 - line 1
Text 1 - line 2
{{iwsection(2)}}
Text 2
{{iwsection(3)}}
Text 3
{{usersection}}
User section.
Text
Text'
h = t.scan(/(?:{{iwsection\(\d+\)}}|{{usersection}})/)
.zip(t.split(/{{iwsection\(\d+\)}}|{{usersection}}/)[1..-1])
.map { |s1,s2| [s1, s2.strip
.lines
.map(&:strip)
.join("\n")] }
.to_h
#=> {"{{iwsection(1)}}"=>"Text 1 - line 1\nText 1 - line 2",
# "{{iwsection(2)}}"=>"Text 2",
# "{{iwsection(3)}}"=>"Text 3",
# "{{usersection}}"=>"User section.\nText\nText"}
Note that this formatting may not be understood by IRB or PRY, but will work fine from the command line.
Explanation
a = t.scan(/(?:{{iwsection\(\d+\)}}|{{usersection}})/)
#=> ["{{iwsection(1)}}", "{{iwsection(2)}}", "{{iwsection(3)}}", "{{usersection}}"]
b = t.split(/{{iwsection\(\d+\)}}|{{usersection}}/)
#=> ["", "\n Text 1 - line 1\n Text 1 - line 2\n ",
# "\n Text 2\n ", "\n Text 3\n ",
# "\n User section.\n Text\n Text"]
c = b[1..-1]
#=> ["\n Text 1 - line 1\n Text 1 - line 2\n ",
# "\n Text 2\n ", "\n Text 3\n ",
# "\n User section.\n Text\n Text"]
h = a.zip(c)
#=> [["{{iwsection(1)}}", "\n Text 1 - line 1\n Text 1 - line 2\n "],
# ["{{iwsection(2)}}", "\n Text 2\n "],
# ["{{iwsection(3)}}", "\n Text 3\n "],
# ["{{usersection}}", "\n User section.\n Text\n Text"]]
d = h.map { |s1,s2| [s1, s2.strip
.lines
.map(&:strip)
.join("\n")] }
#=> [["{{iwsection(1)}}", "Text 1 - line 1\nText 1 - line 2"],
# ["{{iwsection(2)}}", "Text 2"], ["{{iwsection(3)}}", "Text 3"],
# ["{{usersection}}", "User section.\nText\nText"]]
d.to_h
#=> {"{{iwsection(1)}}"=>"Text 1 - line 1\nText 1 - line 2",
# "{{iwsection(2)}}"=>"Text 2",
# "{{iwsection(3)}}"=>"Text 3",
# "{{usersection}}"=>"User section.\nText\nText"}