From 52103c73c2bcfcbbf447900249334f9c6eda418a Mon Sep 17 00:00:00 2001
From: Will <will@wflewis.com>
Date: Fri, 20 Apr 2018 12:30:32 -0400
Subject: [PATCH] Provide an optional starting point for loop()

This adds an optional argument to the top level `loop` method, while continuing to default to `0`.
---
 src/kernel.cr | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/kernel.cr b/src/kernel.cr
index 73e5b9d6bab7..70d4a2c3ac7e 100644
--- a/src/kernel.cr
+++ b/src/kernel.cr
@@ -15,7 +15,7 @@ ARGV         = Array.new(ARGC_UNSAFE - 1) { |i| String.new(ARGV_UNSAFE[1 + i]) }
 ARGF         = IO::ARGF.new(ARGV, STDIN)
 
 # Repeatedly executes the block, passing an incremental `Int32`
-# that starts with `0`.
+# that starts with the argument, which defaults to `0`.
 #
 # ```
 # loop do |i|
@@ -25,11 +25,10 @@ ARGF         = IO::ARGF.new(ARGV, STDIN)
 #   # ...
 # end
 # ```
-def loop
-  i = 0
+def loop(start = 0)
   while true
-    yield i
-    i += 1
+    yield start
+    start += 1
   end
 end