matrix.rb in matrix-0.4.1

- old
+ new

@@ -1014,11 +1014,11 @@
   #--
   # OBJECT METHODS -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
   #++
 
   #
-  # Returns +true+ if and only if the two matrices contain equal elements.
+  # Returns whether the two matrices contain equal elements.
   #
   def ==(other)
     return false unless Matrix === other &&
                         column_count == other.column_count # necessary for empty matrices
     rows == other.rows
@@ -1237,11 +1237,11 @@
   def **(exp)
     case exp
     when Integer
       case
       when exp == 0
-        _make_sure_it_is_invertible = inverse
+        raise ErrDimensionMismatch unless square?
         self.class.identity(column_count)
       when exp < 0
         inverse.power_int(-exp)
       else
         power_int(exp)
@@ -2132,11 +2132,11 @@
   #--
   # PROPERTIES -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
   #++
 
   #
-  # Returns +true+ iff all of vectors are linearly independent.
+  # Returns whether all of vectors are linearly independent.
   #
   #   Vector.independent?(Vector[1,0], Vector[0,1])
   #   #  => true
   #
   #   Vector.independent?(Vector[1,2], Vector[2,4])
@@ -2150,11 +2150,11 @@
     return false if vs.count > vs.first.size
     Matrix[*vs].rank.eql?(vs.count)
   end
 
   #
-  # Returns +true+ iff all of vectors are linearly independent.
+  # Returns whether all of vectors are linearly independent.
   #
   #   Vector[1,0].independent?(Vector[0,1])
   #   # => true
   #
   #   Vector[1,2].independent?(Vector[2,4])
@@ -2163,11 +2163,11 @@
   def independent?(*vs)
     self.class.independent?(self, *vs)
   end
 
   #
-  # Returns +true+ iff all elements are zero.
+  # Returns whether all elements are zero.
   #
   def zero?
     all?(&:zero?)
   end
 
@@ -2191,10 +2191,10 @@
   #--
   # COMPARING -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
   #++
 
   #
-  # Returns +true+ iff the two vectors have the same elements in the same order.
+  # Returns whether the two vectors have the same elements in the same order.
   #
   def ==(other)
     return false unless Vector === other
     @elements == other.elements
   end