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				@@ -300,7 +300,7 @@ export default { 
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				               } 
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				             } 
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				           } 
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				-          let _yearCount = _monthArray[_monthArray.length - 1].usernum - _monthArray[_monthArray.length - 2].usernum  
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				+          let _yearCount = _monthArray.length ? _monthArray[_monthArray.length - 1].usernum - _monthArray[_monthArray.length - 2].usernum : 0 
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				           this.BasicOverview[2] = _yearCount > 0 ? _yearCount : 0 //较上月新增登录次数 
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				           this.monthArray = loginCountMonthArray 
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				@@ -339,7 +339,7 @@ export default { 
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				           for(let i = 0;i < _loginTime.length;i++){ 
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				             _loginTimearray[_loginTime[i].time] = _loginTime[i].usernum 
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				           } 
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				-          this.loginCountYearArray = _loginTimearray 
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				+          this.loginCountYearArray = _loginTime.length ? _loginTimearray : [] 
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				           let _course = res.data[11] // 带分类的课程 
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				           let weekArray = { 
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