Re: simple gsub question \' \` what?


On Mar 30, 2007, at 5:39 PM, Timothy Hunter wrote:

Dustin Anderson wrote:
Sorry for the simple question, I just can't figure this out after a
couple hours...

I need to parse a string:

string = column-1:block-0,block-2,block-1,block-3

and I need to extract everything before the : (colon) into one variable
(should end up like this:
string1 = column-1

and then the rest of the string (block-0,block-2,block-1,block3) into an
array...

I'd use two calls to split:

irb(main):001:0> string = 'column-1:block-0,block-2,block-1,block-3'
=> "column-1:block-0,block-2,block-1,block-3"
irb(main):002:0> string1, s = string.split(':')
=> ["column-1", "block-0,block-2,block-1,block-3"]
irb(main):003:0> string1
=> "column-1"
irb(main):004:0> string2 = s.split(',')
=> ["block-0", "block-2", "block-1", "block-3"]
irb(main):005:0>

You could probably turn that into a one-liner but that's just golfing.


Here's a bit of "live" code that does the same thing (plus .to_f on the elements before turning them into a Vector, but you can knock that part out yourself)

def add line
id, vals = line.split(/:\s*/, 2)
@labels << id
@data << Vector[*(vals.split(',').map {|v| v.to_f})]
end

Note that the second arg (2) to split is important if a ':' can occur anywhere in your block-N parts. Of course, you just need vals.split (',')

-Rob

Rob Biedenharn http://agileconsultingllc.com
Rob@xxxxxxxxxxxxxxxxxxxxxx



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