Ruby map nested array

Question

I have this string that I'm trying split into nested arrays:

x = '{type:paragaph|class:red|content:[class:intro|body:This is the introduction paragraph.][body:This is the second paragraph.]}'
x << '{type:image|class:grid|content:[id:1|title:image1][id:2|title:image2][id:3|title:image3]}'

This so far:

x.scan(/\{(.*?)\}/).map {|m| m[0].split(/\|\s*(?=[^\[\]]*(?:\[|$))/)}

successfully divides it into:

[
  ["type:paragaph", "class:red", "content:[class:intro|body:This is the introduction paragraph.][body:This is the second paragraph.]"],
  ["type:image", "class:grid", "content:[id:1|title:image1][id:2|title:image2][id:3|title:image3]"]
]

I'm trying to add an additional map:

x.scan(/\{(.*?)\}/).map {|m| m[0].split(/\|\s*(?=[^\[\]]*(?:\[|$))/)}.map {|m| m[0].split(/\:\s*(?=[^\[\]]*(?:\[|$))/)}

which returns:

[["type", "paragaph"], ["type", "image"]]

however I am after this instead:

[
  [['type','paragaph'], ['class','red'], ['content',['[class:intro|body:This is the introduction paragraph.][body:This is the second paragraph.]']],
  [['type','image'], ['class','grid'], ['content','[id:1|title:image1][id:2|title:image2][id:3|title:image3]']]
]

The map appears to be applying itself to the whole 2nd level array instead of each element inside it. What am I doing wrong here?

Ismael · Accepted Answer · 2013-03-31 14:56:26Z

1

In the second map you your are splitting only the first element instead of spliting every element with a map

x.scan(/\{(.*?)\}/).map {|m| m[0].split(/\|\s*(?=[^\[\]]*(?:\[|$))/)}.map {|m| m.map {|n| n.split(/\:\s*(?=[^\[\]]*(?:\[|$))/)}}

Also you could clean it up a little extracting the regex into a variable

regex = /\|\s*(?=[^\[\]]*(?:\[|$))/

x.scan(/\{(.*?)\}/).map {|m| m[0].split(regex)}.map {|m| m.map {|n| n.split(regex)}}

answered Mar 31, 2013 at 14:56

Ismael

16.7k6 gold badges63 silver badges76 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Ruby map nested array

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related