I am trying to find the last value of GDPAnn from the array Annual. The code below works fine. But if GDPAnn is not available in the last value, it returns undefined. For example, I want
value 10251000 of GDPAnn from array Annual2.
var Annual = [{"Date":1998,"Value":4.5,"GDPAnn":9062800},{"Date":1999,"Value":4.8,"GDPAnn":9631200},{"Date":2000,"Value":4.1,"GDPAnn":10251000},{"Date":2001,"Value":1,"GDPAnn":10581900}]
x = Annual.map((o) => o.GDPAnn).pop();
console.log(x);
var Annual2 = [{"Date":1998,"Value":4.5,"GDPAnn":9062800},{"Date":1999,"Value":4.8,"GDPAnn":9631200},{"Date":2000,"Value":4.1,"GDPAnn":10251000},{"Date":2001,"Value":1}]
y = Annual2.map((o) => o.GDPAnn).pop();
console.log(y);Please see comment in code below - use .filter()
var Annual = [{"Date":1998,"Value":4.5,"GDPAnn":9062800},{"Date":1999,"Value":4.8,"GDPAnn":9631200},{"Date":2000,"Value":4.1,"GDPAnn":10251000},{"Date":2001,"Value":1,"GDPAnn":10581900}]
x = Annual.map((o) => o.GDPAnn).pop();
console.log(x);
var Annual2 = [{"Date":1998,"Value":4.5,"GDPAnn":9062800},{"Date":1999,"Value":4.8,"GDPAnn":9631200},{"Date":2000,"Value":4.1,"GDPAnn":10251000},{"Date":2001,"Value":1}]
// Adding filter here to only include items with the GDPAnn key
y = Annual2.filter((o) => o.GDPAnn).map((o) => o.GDPAnn).pop();
console.log(y);This could be a simple workaround
var Annual = [{"Date":1998,"Value":4.5,"GDPAnn":9062800},{"Date":1999,"Value":4.8,"GDPAnn":9631200},{"Date":2000,"Value":4.1,"GDPAnn":10251000},{"Date":2001,"Value":1,"GDPAnn":10581900}]
x = Annual.map((o) => o.GDPAnn).pop();
console.log(x);
var Annual2 = [{"Date":1998,"Value":4.5,"GDPAnn":9062800},{"Date":1999,"Value":4.8,"GDPAnn":9631200},{"Date":2000,"Value":4.1,"GDPAnn":10251000},{"Date":2001,"Value":1}]
y = Annual2.filter(o=> o.GDPAnn).map((o) => o.GDPAnn).pop();
console.log(y);let y = Annual2.reduce((prev, curr) => curr.GDPAnn ? curr : prev).GDPAnn