myClass.z = 30j
identifier starts immediately after numeric literal   数字之后马上开始标识符
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引入的js文件如果写成如下的形式:
onReady.js
 
  1. <script> 
  2. Ext.onReady(function(){ 
  3.     new Ext.Component({ 
  4.         renderTo: document.body, 
  5.         html: 'DOM ready!' 
  6.     }); 
  7. }); 
  8. </script> 
报如下错误:
missing } in XML expression
解决方法:去掉<script></script>
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