isEven, isOdd, isNegative, isMaxValue, isMinValue, isInfinite, isPositive, isSingleValue.

pkg/intl/lib/number_format.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library("number_format");
 
 #import('dart:math');
 
 #import("intl.dart");
 #import("number_symbols.dart");
@@ skipping 72 matching lines @@
 
   // TODO(alanknight): Actually use the pattern and locale.
   _setPattern(String x) {}
 
   /**
    * Format [number] according to our pattern and return the formatted string.
    */
   String format(num number) {
     // TODO(alanknight): Do we have to do anything for printing numbers bidi?
     // Or are they always printed left to right?
-    if (number.isNaN()) return symbols.NAN;
-    if (number.isInfinite()) return "${_signPrefix(number)}${symbols.INFINITY}";
+    if (number.isNaN) return symbols.NAN;
+    if (number.isInfinite) return "${_signPrefix(number)}${symbols.INFINITY}";
 
     _newBuffer();
     _add(_signPrefix(number));
     _formatNumber(number.abs());
     _add(_signSuffix(number));
 
     var result = _buffer.toString();
     _buffer = null;
     return result;
   }
@@ skipping 156 matching lines @@
   int get _zero => '0'.charCodes()[0];
 
   /** Returns the code point for the locale's zero digit. */
   int get _localeZero => symbols.ZERO_DIGIT.charCodeAt(0);
 
   /**
    * Returns the prefix for [x] based on whether it's positive or negative.
    * In en_US this would be '' and '-' respectively.
    */
   String _signPrefix(num x) {
-    return x.isNegative() ? _negativePrefix : _positivePrefix;
+    return x.isNegative ? _negativePrefix : _positivePrefix;
   }
 
   /**
    * Returns the suffix for [x] based on wether it's positive or negative.
    * In en_US there are no suffixes for positive or negative.
    */
   String _signSuffix(num x) {
-    return x.isNegative() ? _negativeSuffix : _positiveSuffix;
+    return x.isNegative ? _negativeSuffix : _positiveSuffix;
   }
 }