MatchData providing unexpected result

Rails
1

Hi,

Below are two tests of using MatchData. The first is essentially Hal
Futon’s taken from The Ruby Way, 2nd. ed. [Thanks, Hal]. In
particular, m[0] returns the string being searched.

The 2nd is my humble use. For mine, m[0] returns the search pattern,
it seems,

I can’t anything in the code to account for this difference. I’m
expecting the first kind of response in a Rails app I’m working on,
but I’m getting the second kind of response.

Any ideas?

Thanks in Advance,
Richard

BTW, I running Ruby 1.8.6 over WindowsXP-Pro.SP3

========= Test =========
puts “\n1.”
pat = /(.+[aiu])(.+[aiu])(.+[aiu])(.+[aiu])/i
str = “Fujiyama”
m = pat.match(str)
(0…5).to_a.each { |i| puts “m[%d]: %s” % [i, m[i].to_s] }

puts “\n2.”
pat = /noun/i
str = “The ‘noun’ word is here”
m = pat.match(str)
(0…5).to_a.each { |i| puts “m[%d] %s” % [i, m[i].to_s] }

2

On Sun, Feb 28, 2010 at 12:16 PM, RichardOnRails
[email protected] wrote:

expecting the first kind of response in a Rails app I’m working on,
but I’m getting the second kind of response.

Any ideas?

m[0] doesn’t return the string being searched, it returns everything
which the entire pattern matched.

In the first case /(.+[aiu])(.+[aiu])(.+[aiu])(.+[aiu])/i entirely
matches “Fujiyama”

in the second case /noun/i only matches a portion of the string, so
that’s what is the value of m[0]

–
Rick DeNatale

Blog: http://talklikeaduck.denhaven2.com/
Twitter: http://twitter.com/RickDeNatale
WWR: http://www.workingwithrails.com/person/9021-rick-denatale
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3

Hi Rick,

m[0] doesn’t return the string being searched, it returns everything
which the entire pattern matched.

I got it! In Hal’s example, the matched string just happened to be
the entire string. I didn’t realize that distinction, but I’m on
board now.

Thanks again for upteenth time for pulling my fat out of the fire.

Best wishes,
Richard