JS implementation of the JSON data row to column conversion of the instance code

In order to achieve such data display three sequence, Zhengzhou, Xinxiang, Anyang electricity, you need to realize the conversion of such data, converted into the following form:

Zhengzhou-Electric power Xinxiang-electricity-electricity
201201 33 29 23
201202 35 26 25
201203 34 27 24
201204 36 28 26
201205 34.3 28.8 24.3
This way, the ext chart will show it as a three sequence.
I wrote the following function to implement this function:

Copy Code code as follows:


function Covertdata (Jsondata,idfield, Fromfield, Tofield) {


var result = [], currecord =null, num;


var fromfields = fromfield.split (', ');


//Loop whole array: [{...},{...},{...},...]


for (Var idx=0;idx<jsondata.length;idx++) {


num = findidx (result, IDfield, Jsondata[idx][idfield]);


if (num!=-1) {


Currecord = Result[num];


}


else{


Currecord = {};


};


//loops The fields in each JSON object


for (var key in Jsondata[idx]) {


//processing of transformed data content


for (Var i=0;i<fromfields.length;i++) {


if (key = = Fromfields[i]) {


currecord[jsondata[idx][tofield]+ '-' + fromfields[i]] = Jsondata[idx][key];


break;


}


}


//Except data content, only processing identity field data


if (key = = IDfield) {


Currecord[key] = Jsondata[idx][key];


}


}


if (num==-1) {


Result.push (Currecord);


}


}


return result;


}

Function Findidx (jsondata, ColumnName, value) {
for (var idx = 0;idx<jsondata.length;idx++) {
if (jsondata[ Idx][columnname]==value)
return idx;
}
Return-1; The test code for the
}
Jstestdriver is as follows:
TestCase ("Test JSON data row to column", {
Setup:function () {
This.jsondata = [{yearmonth:201201,ppq:23,spq:27,company: ' Dfsoft '},
{yearmonth:201202,ppq:33,spq:38,company: ' Dfsoft '},
{ Yearmonth:201203,ppq:43,spq:49,company: ' Dfsoft '},
{yearmonth:201204,ppq:53,spq:51,company: ' Dfsoft '},
{ Yearmonth:201201,ppq:29,spq:26,company: ' vcom '},
{yearmonth:201202,ppq:34,spq:38,company: ' vcom '},
{ Yearmonth:201203,ppq:48,spq:43,company: ' vcom '},
{yearmonth:201204,ppq:52,spq:59,company: ' vcom '}];

var Fromfield = ' Ppq,spq ', Tofield = ' Company ', IDfield = ' yearmonth ';
This.resultdata = Covertdata (This.jsondata,idfield,fromfield, Tofield);
},
"Test store has columns": function () {
var month1 = This.resultdata[findidx (this.resultdata, ' Yearmonth ', 201201)];
var month2 = This.resultdata[findidx (this.resultdata, ' Yearmonth ', 201202)];
var month3 = This.resultdata[findidx (this.resultdata, ' Yearmonth ', 201203)];
var Month4 = This.resultdata[findidx (this.resultdata, ' Yearmonth ', 201204)];

Assertequals (4,this.resultdata.length);
Assertequals (' month1[', ' DFSOFT-PPQ ']);
Assertequals (' o ', month1[' VCOM-PPQ ');
Assertequals (' month2[', ' DFSOFT-PPQ ']);
Assertequals (' month2[', ' VCOM-PPQ ']);
Assertequals (' month3[', ' DFSOFT-PPQ ']);
Assertequals (' month3[', ' VCOM-PPQ ']);
Assertequals (' n ', month4[' DFSOFT-PPQ ')];
Assertequals (' month4[', ' VCOM-PPQ ']);

Assertequals (' A ', month1[' DFSOFT-SPQ ');
Assertequals (' num ', month1[' VCOM-SPQ '));
Assertequals (' month2[', ' DFSOFT-SPQ ']);
Assertequals (' month2[', ' VCOM-SPQ ']);
Assertequals (' month3[', ' DFSOFT-SPQ ']);
Assertequals (' month3[', ' VCOM-SPQ ']);
Assertequals (' Wuyi ', month4[' DFSOFT-SPQ ']);
Assertequals (' month4[', ' VCOM-SPQ ']);
}
})

The test passed, indicating that the conversion was successful.