js创建hashtable
摘要：functionHashtable(){this.container=newObject();/**putelement*/this.put=function(key,value){if(typeof(key)=="undefined"){returnfalse;}if(this.contains(key)){returnfalse;}this.container[key]=typeof(value)=="undefined"?null:value;returntrue;};/**removeelement*/this.remove=function(k
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2013-05-16 11:40
紫叶嵋
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SQL查询优化 LEFT JOIN和INNER JOIN
摘要：1, 连接了八个数据库表，而且全部使用LEFT JOIN，如下所示：Resource_Resources ALEFT JOIN Resource_Clients B ON A.ResourceId = B.ResourceIdLEFT JOIN Resource_Files C on B.ClientId=C.ClientIdLEFT JOIN Resource_ClientsModels D ON B.ClientId = D.ClientIdLEFT JOIN Mobile_Models E ON D.ModelId = E.ModelIdLEFT JOIN dbo.Resource_Im
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2013-05-08 14:31
紫叶嵋
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