js:文字列をjsonオブジェクトにつなぐ

紹介:jsonオブジェクト[「jobcode」:“111”,“goodunits”:“000”,“rejectUnits”:“222”,を
                            ["period":"111","licensed":"000","sorned":"222"],
 

var productductionData = [{
    "jobCode": "BYD180_190326114457",
    "machCode": "  500T",
    "mouldCode": "180222",
    "goodUnits": 564,
    "availability": 99.97,
    "quality": 96.41,
    "performance": 84,
    "jobManager": "MES",
    "endTime": "2019-03-30 10:06:18",
    "startTime": "2019-03-26 11:46:49",
    "achievdRate": 5.64,
    "scheduledProducedUnits": 9999,
    "rejectUnits": 20,
    "adjustUnits": null
}]

 
var groups_code = "";  
for (var k = 0; k < productductionData.length; k++) {             
 groups_code = groups_code + '{"period":"' + productductionData[k].jobCode + '","licensed":"' + productductionData[k].goodUnits + '","sorned":"' + productductionData[k].rejectUnits + '"}' + ',' 
}       //        
      groups_code = groups_code.substring(0, groups_code.length - 1);       //      JSON  
      groups_code = '[' + groups_code + ']';      
var obj_groups = JSON.parse(groups_code); // json     json     

    JSON   = [{
    "period": "BYD180_190326114457",
    "licensed": "564",
    "sorned": "20"
},
{
    "period": "  M50159_190329101136",
    "licensed": "1780",
    "sorned": "8"
},
{
    "period": "BYD150157_190329161831",
    "licensed": "475",
    "sorned": "0"
},
{
    "period": "  M50159_190330095755",
    "licensed": "1484",
    "sorned": "84"
},
{
    "period": "BYD150157_190330095936",
    "licensed": "1427",
    "sorned": "0"
},
{
    "period": "BYD180_190330100149",
    "licensed": "833",
    "sorned": "76"
},
{
    "period": "   150165_190330110209",
    "licensed": "0",
    "sorned": "2"
},
{
    "period": "66_190401093344",
    "licensed": "6906",
    "sorned": "0"
},
{
    "period": "  _190401094819",
    "licensed": "0",
    "sorned": "0"
},
{
    "period": "BYD150157_190401102829",
    "licensed": "8",
    "sorned": "0"
},
{
    "period": "BYD180_190401102927",
    "licensed": "11929",
    "sorned": "2939"
},
{
    "period": "  M50159_190401103710",
    "licensed": "21840",
    "sorned": "226"
},
{
    "period": "  _190401112654",
    "licensed": "5374",
    "sorned": "158"
},
{
    "period": "BYD150157_190401140039",
    "licensed": "4641",
    "sorned": "0"
},
{
    "period": "   150165_19041720120",
    "licensed": "0",
    "sorned": "0"
}]