I personally would look at it from an SQL-like perspective.
Enumerable includes a method #find_all or #select which pretty much
does what you want from array_of_group, I think.
list.select { |obj| select-condition }.each { |e| puts e }
# => objects matching select-condition have
If you want to try to combine the methods, I think your
writing it as “each_by_group” (I would call it “group_each” or
“each_group”) is probably the better method.
-austin
– Austin Ziegler, austin@halostatue.ca on 2003.03.30 at 23:56:50
···
On Mon, 31 Mar 2003 13:34:58 +0900, Sam Roberts wrote:
I thought of a 3rd way, but I don’t know if its too clever.
Basically, I can write one method, that takes a cond block as its
argument, and returns a class which defines “each” in terms of
that condition, and includes enumerable. Now I only have to write
two methods, and I can let Enumerable do the heavy lifting for me.
Or is that too clever/confusing?
def each_by_group(group) … for all matches yield(match) end
def array_of_group(group) Array.new(all matches…) end