From 715236b5b495d64f9f21a3c2ef80e387aba431da Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Sat, 15 Aug 2020 19:42:18 +0900
Subject: [PATCH] Improve comments

---
 lib/uplot/command.rb | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/lib/uplot/command.rb b/lib/uplot/command.rb
index 6932aa9..7131e9a 100644
--- a/lib/uplot/command.rb
+++ b/lib/uplot/command.rb
@@ -275,12 +275,14 @@ module Uplot
     end
 
     def preprocess(input)
-      data = CSV.parse(input, col_sep: @delimiter)
-      data.delete([]) # Remove blank lines.
-      data.delete_if { |i| i.all? nil } # Room for improvement.
-      p parsed_csv: data if @debug
-      headers = get_headers(data)
-      data = get_data(data)
+      arr = CSV.parse(input, col_sep: @delimiter)
+      # Remove blank lines.
+      arr.delete([])
+      # Remove rows where all elements are nil
+      arr.delete_if { |i| i.all? nil }
+      p parsed_csv: arr if @debug
+      headers = get_headers(arr)
+      data = get_data(arr)
       [data, headers]
     end