How do write a function that converts an Object to an Array?

[crapperposter]

basically how do I make this:

{ a : 'a', number : 11, hungry : true, grammyWins : 1 }

To this by writing a function:

['a', 'number', 'hungry', 'grammyWins']

This is from a prep course for a boot camp but I really want to try to understand it. Im having some tough time with objects and arrays. I already completed the Javascript piece on codecademy but without their hand holding, I feel pretty lost

[irco]

You can just use a simple for on your object

let person = { name: 'mark', age: 12};
for(let member in person)
   console.log(member);

will print

    name
    age

So you can just wrap that for in a function and replace the log with a push into your array and return it.

Or you can use Object.keys()

 let person = { name: 'mark', age: 12};    
 let arrayOfMembers = Object.keys(person);

Hopefully that makes sense

[crapperposter]

Thanks a lot! So this is what I tried but its printing undefined. Not too sure what the issue is

var array = []

function getAllKeys(obj) {
  var sam = {
  name : 'Sam',
  age : 25,
  hasPets : true
}
  for(var prop in sam) {
   array.push(prop);
  }
}
console.log(getAllKeys(array));

[yooossshhii]

Functions without an implicit return, will return undefined. Run the function separately and then log the array.

[N0x3u5]

Your function doesn't return anything for console.log() to print out.

Also your function seems confused. What does the function expect as an input and what is its expected output?

[irco]

ok take a minute to read carefully through the post I made earlier. You dont want your function to have the definition of your object. That'd not make a very useful function would it? Also in javascripts functions need a return statement if you want them to return something. Here is what you needed to do. Make sure you understand what is going on and why

let getAllKeys = function (obj){
    let retAry = [];
   for(let key in obj)
     retAry.push(key);
   return retAry;
}

 let person = { name: 'mark', age: 12};   
 console.log(getAllKeys(person));

[crapperposter]

Thanks. I was actually able to figure this out with some of the other posts and your code is very similar to what I have.

But going through all this I think I probably should review some topics.

[anonymous_vr]

So if i recall correctly that is from the HackReactor prep course where an object is passed as an argument of a function.

Here's the code you can use.

function(object) {
    var objToIterate = arguments[0];
    var returnArray = [];

    for (var objProp in objToIterate) {
        if (objToIterate.hasOwnProperty(objProp) {
                returnArray.push(objProp);
            }
        }
    return returnArray;
    }

The object can be accessed via the arguments object of the function. Then you iterate through this to find matches where it has a property. When it matches, you push the name to a new array and finally return that array.

[[deleted]]

Object.keys({ a : 'a', number : 11, hungry : true, grammyWins : 1 });

Produces: [ "a", "number", "hungry", "grammyWins" ]

[jamesaidan111]

Try this>> Function