Returning specific value of javascript object

Question

I have a script which returns this as "r2":

{
    waitSeconds: 0,
    runSeconds: 0,
    report: {
        data: [{
            breakdown: [{}],
            breakdownTotal: ["608674"],
            day: 1,
            month: 10,
            name: "Mon.  1 Oct. 2018",
            year: 2018,
        }, {
            name: "Tue.  2 Oct. 2018",
            year: 2018,
            month: 10,
            day: 2,
            breakdown: [{}],
            breakdownTotal: ["123456"]
        }, {
            name: "Wed.  3 Oct. 2018",
            year: 2018,
            month: 10,
            day: 3,
            breakdown: [{}],
            breakdownTotal: ["123456"]
        }, {
            name: "Thu.  4 Oct. 2018",
            year: 2018,
            month: 10,
            day: 4,
            breakdown: [{}],
            breakdownTotal: ["123456"]
        }, ],
        elements: [{}],
        metrics: [{}],
    }
}

I'm trying to capture two things and return them in the format:

[X,Y,Z,ETC]

I've been able to grab the day using this code:

const days = r2.report.data.map(obj => obj.day);

However when I try and get breakdownTotal (i.e 608674)

const metric = r2.report.data.map(obj => obj.breakdownTotal);

It returns this:

[Array(1), Array(1), Array(1), Array(1)]

How can I get it to return the breakdownTotal values?

breakdownTotal is an array in your example data, so that seems correct. What are you trying to achieve? — Jerodev
– Jerodev, Commented Oct 10, 2018 at 12:56
But you are getting the value, the code you've posted above says that breakdownTotal is an array, you can do const metric = r2.report.data.map(obj => obj.breakdownTotal[0]); to get them to be "608674" but that's assuming the value of breakdownTotal always only has one value in the array, or do you just want the value of const to be "608674"? — George
– George, Commented Oct 10, 2018 at 12:57
@Jerodev I'm trying to get the number. of breakdown total (608674) — Jimmy
– Jimmy, Commented Oct 10, 2018 at 12:57
It is an array, try this to fetch first index r2.report.data.map(obj => obj.breakdownTotal[0]); — Dilip Belgumpi
– Dilip Belgumpi, Commented Oct 10, 2018 at 12:58
@Jimmy in Chrome's console, you can use the expression: copy(r2) to copy the variable as formatted JSON into your clipboard. Otherwise you can log JSON.stringify(r2, null, 2) and then manually copy the output. This helps people understand the problem. — Eliseu Monar dos Santos
– Eliseu Monar dos Santos, Commented Oct 10, 2018 at 13:03

Aoke · Accepted Answer · 2018-10-10 12:59:43Z

2

You want the first value of the breakdown array not the array itself, right?

const metric = r2.report.data.map(obj => obj.breakdownTotal[0]);

Try this?

answered Oct 10, 2018 at 12:59

Aoke

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