How to Construct an array by es6 class

Question

I expect that a class return an array when I new it

class MyArray {
  constructor(){

  }
}

const myArray = new MyArray()
Array.isArray(myArray) // Should be true

I used to write it in this way:

class MyArray {
  constructor(){
    const arry = new Array()
    return arry
  }
}

But when I write in Typescript,the return value arry is not the type of MyArray, so it prompt an error.

How to fixed this problem?

Not sure what you are trying to achieve. Why should Array.isArray(myArray) be true when it's obviously a class and not an array. — klugjo
– klugjo, Commented Dec 13, 2017 at 9:43

gurvinder372 · Accepted Answer · 2017-12-13 09:43:13Z

7

Just extend Array and return true in the constructor

class MyArray extends Array{
  constructor(){
    super()
  }
}

Demo

class MyArray extends Array{
  constructor(){
    super()
  }
}

myArray2 = new MyArray()
console.log(Array.isArray(myArray2));

answered Dec 13, 2017 at 9:43

gurvinder372

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