[styleArr, matArr, fieldArr] = [styleArr, matArr, fieldArr].map((key, index) => 
data.items[0]["companys_self_type" + [
    "styleid", "matid", "fieldid"
][index]].split(','))

function deal(n){
return data.items[0].n.split(',')
}
styleArr = deal(companys_self_type_styleid);
matArr = deal(companys_self_type_matid);
fieldArr = deal(companys_self_type_fieldid);

var data = {};
for (var prop in data.items[0]) {
  var i = prop.substring(prop.lastIndexOf('_') + 1, prop.lastIndexOf('id')) + 'Arr';
  data[i] = data.items[0][prop].split(',');
}

var arr = data.items[0].companys_self_type_styleid.split(',');
var styleArr,matArr,fieldArr
styleArr = matArr = fieldArr = arr ;