Raise ArgumentError if count given to Array#first is negative

opal · Sep 20, 2013 · b5f907c · b5f907c
1 parent ed94fc4
commit b5f907c
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Showing 2 changed files with 5 additions and 3 deletions.
diff --git a/corelib/array.rb b/corelib/array.rb
@@ -559,6 +559,11 @@ def fill(obj = undefined, &block)
   def first(count = undefined)
     %x{
       if (count != null) {
+
+        if (count < 0) {
+          #{raise ArgumentError};
+        }
+
         return #{self}.slice(0, count);
       }
 

diff --git a/spec/filters/bugs/array/first.rb b/spec/filters/bugs/array/first.rb