Challenge is complete

lib/challenge.rb

@@ -10,10 +10,28 @@ def initialize(file_path)
   end
 
   def parse
-    # Parse the file located at @file_path and set three attributes:
-    #
-    # earliest_time: the earliest time contained within the data set
-    # latest_time: the latest time contained within the data set
-    # peak_year: the year with the most number of timestamps contained within the data set
+    earliest_time = Time.now.to_i #converts current time into timestamp and saves it in the earlist_time local variable.
+    latest_time = 0               #asign latest time local variable to have a starting value.
+    peak_year = {}                #declare a hash for peak year.
+
+    File.open(@file_path, 'r').each do |line| # For loop to iterate through every line in timestamps.txt file 
+
+      timestamp_i = Time.xmlschema(line).to_i #converting 2022-05-30 11:56:52 -0400 into 1653926221 to reduce number off calls to Time and this will reduce the runtime
+      timestamp = Time.xmlschema(line)
+
+      #Logic for the earliest time in the data set
+      earliest_time = earliest_time < timestamp_i ? earliest_time : timestamp_i
+
+      #Logic for the latest time contained in the data set
+      latest_time = latest_time > timestamp_i ? latest_time : timestamp_i
+
+      #Logic for the peak year with the most number of timestamps contained in the data set
+      peak_year.key?(timestamp.year) ? peak_year[timestamp.year] += 1 : peak_year[timestamp.year] = 1
+
+   end
+
+  @latest_time = Time.at(latest_time)
+  @earliest_time = Time.at(earliest_time)
+  @peak_year = peak_year.key(peak_year.values.max)
   end
 end