Access most recent table row and its data - ruby

Question

I'm creating a small app based on the conditions of the results of the last game played, or the last row with game data (win/lose and game number).
My issue is accessing the first column of the last row (most recent game played). How is that accomplished?
require 'open-uri'
class BrooklynPizzaController < ApplicationController
def index
# URL for dynamic content
url = "http://www.basketball-reference.com/teams/BRK/2015_games.html"
# Open URL using nokogiri
doc = Nokogiri::HTML(open(url))
# Scrape result from Web site
#result = doc.css("#teams_games").xpath("//table/tbody/tr/td[8]/text()")
# IN PROGRESS - Get date of last game played
#result_date = doc.xpath('//table/tbody/tr/td[2]/a/text()') do |link|
#result_date[link.text.strip] = link['a']
end
###############################################################
# IN PROGRESS - Get number of last game played from 1st column
# doc.xpath('//table/tbody/tr/td[1]/text()') do |game|
# last_game_number =
# end
################################################################
# #result_date = doc.css("#teams_games").xpath("//table/tbody/tr/td[2]/text()")
# Set date to current
#date = Date.today
# Get date of last game played
if (#result.last.next == nil)
flag = doc.xpath("//table/tbody/tr[#{#result}]")
#result_date = doc.xpath("//table/tbody/tr#{flag}/td[2]/a/text()")
end
end
end
Please let me know what lack of information I'm giving you, because I feel like I've left out some things.

Answer 1

To get the row you would do this:
win_loss_tds = doc.css("#teams_games tbody tr td:nth-child(8):not(:empty)").last
last_win_loss_row = win_loss_tds.last.parent
There's undoubtedly a way to do that in a single XPath expression, but I'll leave that as an exercise to the reader since I don't care for XPath.
To get the game number from the first column you would do this:
game_num_col = last_win_loss_row.at("td:first-child")
game_num = game_num_col.text.to_i
# => 82
And to get the date from the second column:
date_col = last_win_loss_row.at("td:nth-child(2)") # XPath: td[2]
date = DateTime.parse(date_col.text)
# => 2015-04-15T00:00:00+00:00
If you want date and time, you could do this:
time_col = last_win_loss_row.at("td:nth-child(3)")
date_time = DateTime.parse("#{date_col.text} #{time_col.text}")
# => 2015-04-15T08:00:00-03:00

Answer 2

Well, I'd do this:
require 'open-uri'
require 'nokogiri'
doc = Nokogiri::HTML(open("http://www.basketball-reference.com/teams/BRK/2015_games.html"))
latest_score_row = doc.search('//tr/td/a[contains(.,"Box Score")]/../..').last
latest_text = latest_score_row.search('td').map(&:text)
# => ["13",
# "Sat, Nov 22, 2014",
# "8:30p EST",
# "",
# "Box Score",
# "#",
# "San Antonio Spurs",
# "L",
# "",
# "87",
# "99",
# "5",
# "8",
# "L 1",
# ""]
But YMMV.
How does it work? Easy. It looks for <a> nodes in the page containing "Box Score", then, for each one found, backs up two levels to the <tr> node and returns an array to Nokogiri/Ruby. last takes the last one found.
Then it's just a matter of looking in that row for the <td> nodes and grabbing their text.
The time stamp is then a matter of pulling the date and time from the array, doing a tiny bit of massaging of the "am/pm" and letting Ruby build an object:
latest_time = Time.strptime(
[
latest_text[1], # => "Sat, Nov 22, 2014"
latest_text[2].sub(/([ap])/, '\1m') # => "8:30pm EST"
].join(' '), # => "Sat, Nov 22, 2014 8:30pm EST"
'%a, %b %d, %Y %H:%M%P %Z' # => "%a, %b %d, %Y %H:%M%P %Z"
) # => 2014-11-22 18:30:00 -0700