如何将这种类型的数组转换为json对象？

Question

I have this array:

[ [ '560134275538747403', 39953 ],
  [ '411510958020624384', 36164 ],
  [ '468512396948930576', 31762 ],
  [ '482286641982078977', 29434 ],
  [ '249892869127536641', 6295 ] ]

And I want to covert it into an object like this:

{
"560134275538747403":39953,
"411510958020624384":36164,
"468512396948930576":31762,
"482286641982078977":29434,
"249892869127536641":6295
}

Anyway to do that? ~and thx

Answer 1

Either use Object.fromEntries :

 const arr=[['560134275538747403',39953],['411510958020624384',36164],['468512396948930576',31762],['482286641982078977',29434],['249892869127536641',6295]]; const res = Object.fromEntries(arr); console.log(res); 

Or, as that's not widely supported, reduce :

 const arr=[['560134275538747403',39953],['411510958020624384',36164],['468512396948930576',31762],['482286641982078977',29434],['249892869127536641',6295]]; const res = arr.reduce((a, [k, v]) => (a[k] = v, a), {}); console.log(res); 

Answer 2

You can go ahead by using the ES2019 feature Object.fromEntries(...) ,

 const array=[ [ '560134275538747403', 39953 ], [ '411510958020624384', 36164 ], [ '468512396948930576', 31762 ], [ '482286641982078977', 29434 ], [ '249892869127536641', 6295 ] ]; const object=Object.fromEntries(array); console.log(object); 

Suppose if it isn't supported in Node. Then you can use it after you install a shim of it from npm, https://www.npmjs.com/package/object.fromentries

Here is a Runkit link that shows it working using the shim in Node, https://runkit.com/embed/lkupsniraw2c