Moved to unless from if not for code clarity and changed wording

of few error messages.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/delete_at.rb b/delete_at.rb
index 1869476..10190ba 100644
--- a/delete_at.rb
+++ b/delete_at.rb
@@ -12,25 +12,25 @@ module Puppet::Parser::Functions
 
     array = arguments[0]
 
-    if not array.is_a?(Array)
-      raise(Puppet::ParseError, 'delete_at(): Requires an array to work with')
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'delete_at(): Requires array to work with')
     end
 
     index = arguments[1]
 
     if index.is_a?(String) and not index.match(/^\d+$/)
       raise(Puppet::ParseError, 'delete_at(): You must provide ' +
-        'positive numeric index')
+        'non-negative numeric index')
     end
 
     result = array.clone
 
-    # In Puppet numbers are often string-encoded ...
+    # Numbers in Puppet are often string-encoded which is troublesome ...
     index = index.to_i
 
     if index > result.size - 1 # First element is at index 0 is it not?
       raise(Puppet::ParseError, 'delete_at(): Given index ' +
-        'exceeds array size')
+        'exceeds size of array given')
     end
 
     result.delete_at(index) # We ignore the element that got deleted ...