Given a binary tree, return the vertical order traversal of its nodes' values. (ie, from top to bottom, column by column). If two nodes are in the same row and column, the order should be from left to right. Examples: Given binary tree [3,9,20,null,n
原文地址:http://379548695.iteye.com/blog/1167234 grid的复选框定义如下: var sm = new Ext.grid.CheckboxSelectionModel({ handleMouseDown : Ext.emptyFn, singleSelect : false }); 为grid的store添加load监听如下: store.addListener('load',function(){ var records=[];//存放选中记录 fo