From 86c73105ee25ce688d6c05902a198fb7ea8a70a9 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Fri, 15 Aug 2014 04:01:37 +0900
Subject: [PATCH] Improve performance of `--nth` option (#90 contd.)

---
 fzf | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/fzf b/fzf
index 935944d..791fc3b 100755
--- a/fzf
+++ b/fzf
@@ -1106,15 +1106,18 @@ class FZF
           unless @delim
             # AWK default
             prefix_length = str.index(/\S/) || 0
-            tokens = str.strip.scan(/\S+\s*/) rescue []
+            tokens = str.scan(/\S+\s*/) rescue []
           else
             prefix_length = 0
             tokens = str.scan(@delim) rescue []
           end
           @nth.map { |n|
-            (part = tokens[n]) &&
+            if n.begin == 0 && n.end == -1
+              [prefix_length, tokens.join]
+            elsif part = tokens[n]
               [prefix_length + (tokens[0...(n.begin)] || []).join.length,
-               part.join.sub(/\s+$/, '')]
+               part.join]
+            end
           }.compact
         end
     end