diff --git a/mrblib/array.rb b/mrblib/array.rb
index cef944f8a..657a7a5e4 100644
--- a/mrblib/array.rb
+++ b/mrblib/array.rb
@@ -5,6 +5,10 @@
 # ISO 15.2.12
 class Array
   ##
+  # call-seq:
+  #   array.each {|element| ... } -> self
+  #   array.each -> Enumerator
+  #
   # Calls the given block for each element of +self+
   # and pass the respective element.
   #
@@ -21,6 +25,10 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array.each_index {|index| ... } -> self
+  #   array.each_index -> Enumerator
+  #
   # Calls the given block for each element of +self+
   # and pass the index of the respective element.
   #
@@ -37,6 +45,10 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array.collect! {|element| ... } -> self
+  #   array.collect! -> new_enumerator
+  #
   # Calls the given block for each element of +self+
   # and pass the respective element. Each element will
   # be replaced by the resulting values.
@@ -55,6 +67,10 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array.map! {|element| ... } -> self
+  #   array.map! -> new_enumerator
+  #
   # Alias for collect!
   #
   # ISO 15.2.12.5.20
@@ -110,6 +126,9 @@ class Array
   alias to_s inspect
 
   ##
+  # call-seq:
+  #   array == other   -> true or false
+  #
   #  Equality---Two arrays are equal if they contain the same number
   #  of elements and if each element is equal to (according to
   #  Object.==) the corresponding element in the other array.
@@ -129,6 +148,9 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array.eql? other_array -> true or false
+  #
   #  Returns <code>true</code> if +self+ and _other_ are the same object,
   #  or are both arrays with the same content.
   #
@@ -147,6 +169,9 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array <=> other_array -> -1, 0, or 1
+  #
   #  Comparison---Returns an integer (-1, 0, or +1)
   #  if this array is less than, equal to, or greater than <i>other_ary</i>.
   #  Each object in each array is compared (using <=>). If any value isn't
@@ -187,6 +212,10 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array.delete(obj) -> deleted_object
+  #   array.delete(obj) {|nosuch| ... } -> deleted_object or block_return
+  #
   # Delete element with index +key+
   def delete(key, &block)
     while i = self.index(key)
@@ -198,6 +227,10 @@ class Array
   end
 
   ##
+  # call-seq:
+  #   array.sort! -> self
+  #   array.sort! {|a, b| ... } -> self
+  #
   # Sort all elements and replace +self+ with these
   # elements.
   def sort!(&block)
@@ -265,10 +298,21 @@ class Array
     self
   end
 
+  ##
+  # call-seq:
+  #   array.sort -> new_array
+  #   array.sort {|a, b| ... } -> new_array
+  #
+  # Returns a new Array whose elements are those from +self+, sorted.
   def sort(&block)
     self.dup.sort!(&block)
   end
 
+  ##
+  # call-seq:
+  #   array.to_a -> self
+  #
+  # Returns self, no need to convert.
   def to_a
     self
   end