如何使用 JavaScript 从数组中删除第二个方括号？

Question

I have an array something like this:

data: [
  [
    {}, {} ... //multiple objects
  ]
]

How do I remove those second square brackets? I want it to be changed from [[{}]] to [{}] .

Answer 1

You can use Array.flat() to flatten sub-arrays:

 const data = [ [ {id: 1}, {id: 2} ], [ {id: 3}, {id: 4} ] ]; const newData = data.flat(); console.log(newData);

If Array.flat() is not supported, you can spread the array into Array.concat() :

 const data = [ [ {id: 1}, {id: 2} ], [ {id: 3}, {id: 4} ] ]; const newData = [].concat(...data); console.log(newData);

Answer 2

Extract first item of your array

 var data = [ [ {id: 1}, {id: 2} ] ] console.log(data); var newData = data[0]; console.log(newData);

Answer 3

What about If i have

[[{},{},{}]]

I want to remove extra brackets outside and want this [{},{},{}]

I am not able to clean it up the array.