Generate an array using the properties of an object

Seeking a more efficient way to configure settings for an app using objects? Consider starting with the following object:

var obj = {
    property_one: 3;
    property_two: 2;
    property_three: 1;
}

And transforming it into the desired array format:

var array = [
    'property_one','property_one','property_one',
    'property_two','property_two',
    'property_three'
]

Tired of manually looping through each property? You're not alone! Let's find a smarter solution that can adapt as your app grows.

One approach is to iterate through object's properties like so:

for (var key in obj) {
  if (obj.hasOwnProperty(key)) {
    array.push(key);
  }
}

This will push the actual property name (as a string) to the array. Any thoughts on streamlining this process even further?

Answer №1

Give this a shot

function createArrayFromObject(){
  for (var property in obj) {
    if (obj.hasOwnProperty(property)) {
      for(var i=1; i <= obj[property]; i++){
        this.array.push(property);
      };
    }
  }
}

Answer №2

Utilizing the power of Array.prototype.reduce():

var obj = {
  property_one: 3,
  property_two: 2,
  property_three: 1
};

var resultArray = Object.keys(obj).reduce(function(result, curItem) {
  for (var index = 0; index < obj[curItem]; index++) {
    result.push(curItem);
  }
  return result;
}, []);

document.write(JSON.stringify(resultArray));

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