将对象数组转换为数组 node.js

Question

I currently have an array of objects which is the following.

[
  { desc: '1', qty: '2', amt: '1', index: 0 },
  { desc: '1', qty: '2', amt: '1', index: 1 }
]

I need to turn this array of objects to something like that

[
     ['1','2','1',0 ],
     ['1','2','1',1]
]

Any ideas?

Answer 1

You can use .map() and Object.values() :

The map() method creates a new array populated with the results of calling a provided function on every element in the calling array.

The Object.values() method returns an array of a given object's own enumerable property values, in the same order as that provided by a for...in loop. (The only difference is that a for...in loop enumerates properties in the prototype chain as well.)

Try as the following:

 const data = [ { desc: '1', qty: '2', amt: '1', index: 0 }, { desc: '1', qty: '2', amt: '1', index: 1 } ] const result = data.map(e => Object.values(e)) console.log(result)

Answer 2

If the order of the properties in the object is guaranteed, you can use create a new array with Array.map() , and use Object.values() as the callback:

 const arr = [ { desc: '1', qty: '2', amt: '1', index: 0 }, { desc: '1', qty: '2', amt: '1', index: 1 } ] const result = arr.map(Object.values) console.log(result)

If the order of the properties in the objects might change, use Array.map() , and then call Array.map() again to extract the properties that you want in the the order you specify:

 const arr = [ { desc: '1', qty: '2', amt: '1', index: 0 }, { desc: '1', qty: '2', amt: '1', index: 1 } ] const order = ['desc', 'qty', 'amt']; // 'index' removed const result = arr.map(o => order.map(k => o[k])) console.log(result)

Answer 3

const data = [
  { desc: '1', qty: '2', amt: '1', index: 0 },
  { desc: '1', qty: '2', amt: '1', index: 1 }
];

var arr = [];

data.map(function(obj) {
   arr.push(Object.values(obj))
});

console.log(arr) // value gets stored in arr object