This post originated from an RSS feed registered with Ruby Buzz by Gregory Brown. Original Post: Patches to make DataSet shiny Feed Title: Ruby Reports Blog Feed URL: http://www.cwinters.com/blog/index.rss Feed Description: News and Updates regarding the Ruby Reports library and toolset. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Gregory Brown Latest Posts From Ruby Reports Blog

Dudley is kicking ass today! Two Three new patches commited to SVN

1

Here's a patch that changes the dataset constructor to  
accept :content and :default keywords. Also, DataSet right now has  
two different implementations of clone(). I'm pretty sure one of them  
needs to go away.

-d

2

Here's a patch to allow DataSet#<< to do the right thing when  
appending another DataSet, or a DataRow, or an array of DataRows. It  
only works if the sets have the same fields. We should probably  
figure out a coherent semantics for comparing DataSets and DataRows  
so we can do set unions and intersections and stuff like that in a  
way that makes sense, but I'm still not quite sure how that should  
work. Oh, and there's a little DataSet#to_a in there that just calls  
to_a on the set's @data, too.

-d

3

Okay, this is the last one for today (I think :-) ). It's an
implementation of the basic set operations (union, intersection, and
difference) for DataSets. It also adds + as an alias to concat for
smooshing two similar DataSets together.

-d

Example of the set operations stuff

>> ([ [1,2],[3,4] ].to_ds(%w[a b]) & [ [3,4] , [1,2], [5,6] ].to_ds(%w[a b])).as(:csv)
=> "a,b\n1,2\n3,4\n"

>> ([ [1,2],[3,4] ].to_ds(%w[a b]) | [ [3,4], [1,2], [5,6] ].to_ds(%w[a b])).as(:csv)
=> "a,b\n1,2\n3,4\n5,6\n"