Uncaught TypeError: Cannot read property 'DYMC' of null

    var arr = [null,{"ADDR":"","BZ":"","CZSJ":"","DYMC":"哈哈","FJH":"","GRMJ":"","GRQ":"","GRQF":0,"KH":"","LHMC":"","QFJE":0,"SFLX":"","TRQF":0,"XQMC":"","YHBH":"","YHLB":"","YHXM":"","ZNJ":0}]
for(var i in arr){console.log(arr[i].DYMC);}

报错

Uncaught TypeError: Cannot read property 'DYMC' of nullat 1.html:13

原因数组遍历是因为有null
更改：

 var arr = [null,{"ADDR":"","BZ":"","CZSJ":"","DYMC":"哈哈","FJH":"","GRMJ":"","GRQ":"","GRQF":0,"KH":"","LHMC":"","QFJE":0,"SFLX":"","TRQF":0,"XQMC":"","YHBH":"","YHLB":"","YHXM":"","ZNJ":0}]for(var i in arr){if(arr[i]!=null){console.log(arr[i].DYMC);}}

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