How do I convert an array of nested objects into a String?

Question

I would like to convert a nested array of Objects into a String. How do I do this?

I have tried the .toString() method but that just returns [Object object], which is not what I want.

My array looks like this:

[[
{"incr":261,"decr":547},
{"incr":259,"decr":549}
],
[{"incr":254,"decr":547}]
]

And I want to be able to convert it into a String that looks exactly like that.

You can use space third argument (developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…) of the JSON.stringify() to format the result with identation: JSON.stringify(data, null, 2) — Andriy
– Andriy, Commented Aug 7, 2019 at 21:46

Mohrn · Accepted Answer · 2019-08-07 21:29:17Z

2

Is this what you had in mind?

const data = [
  [{ incr: 261, decr: 547 }, { incr: 259, decr: 549 }],
  [{ incr: 254, decr: 547 }]
];

// like this?
console.log(JSON.stringify(data))
// or maybe like this with some more control over how you generate the string?
console.log(data.reduce((acc, val) => acc.concat(val), []).map(({ incr, decr }) => `Increase: ${incr} - decrease: ${decr}`).join(', '))

answered Aug 7, 2019 at 21:29

Mohrn

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