how to convert array to array list in typescript

Question

hi all,

 

i need to convert  array into array list

 

while i'm trying im getting laset array only

var week_name=[];
var week_val=[];
weeek.forEach(function (item) {
week_name=week_name.concat(item['WeekName'].split(','));
week_val =week_val.concat(item['value']);
week_val11=week_val;
});
fdata = {
labels: dbfileld,
datasets: [{
label: "week_name",
backgroundColor: 'rgba(16, 172, 132)',
data: week_val11
}]
};
});
console.log(fdata);