Object.create with arguments

Question

Disclaimer: I don't want to use constructors and I don't want to use the keyword new. I want to do this all with Object.create.

Here is the code I have, that works perfectly fine:

var vectorPrototype = {
    x: null,
    y: null
} 

var v1 = Object.create(vectorPrototype)    // line 6
v1.x = 1
v1.y = 1

console.log(v1);
// { x: 1, y: 1 }

What I would like to do, is create a new object and pass in x and y all in one line. Is this possible?

make a function that calls Object.create(), then the other stuff needed to the instance for a one-liner. — dandavis
– dandavis, Commented Mar 27, 2015 at 20:12

eladcon · Accepted Answer · 2015-03-27 20:08:28Z

2

You could use the properties parameter:

Object.create(vectorPrototype, { x: { value: 1 }, y: { value: 1 } })

answered Mar 27, 2015 at 20:08

eladcon

5,8251 gold badge18 silver badges19 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

ApathyBear Over a year ago

This is good. I guess I am confused why I need to specify value. Is this some type of standardized way that this always is done?

eladcon Over a year ago

yes,this how you define a default value. thats part of the properties you can give tox along with writable, configurable etc.. check this link developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…

Petr Skocik · Accepted Answer · 2015-03-27 20:20:48Z

0

Off the top of my hat:

function Vector(x, y)  {
   var prototype = {
    x: null,
    y: null
  } ;
  var ret = Object.create(prototype);
  ret.x = x;
  ret.y = y;
  return ret;
}

This should work with new as well as without it. That said, I'm not sure if this classifies as "not a constructor" in your point of view.

edited Mar 27, 2015 at 20:20

answered Mar 27, 2015 at 20:13

Petr Skocik

60.5k7 gold badges105 silver badges165 bronze badges

Comments

Armīns Nikolajevs · Accepted Answer · 2015-03-27 20:10:27Z

-1

You can create object like this:

var v1 = {x:1, y:1};

answered Mar 27, 2015 at 20:10

Armīns Nikolajevs

1073 silver badges9 bronze badges

Collectives™ on Stack Overflow

Object.create with arguments

3 Answers 3

2 Comments

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Related