Convert an object of arrays into an array of arrays in JavaScript

Question

I have an object with arrays, each of which has numbers with double quotes, and I'd like to convert it into an array of arrays without double quotes.

This

> Object { CategoryA: Array[182], CategoryB: Array[180],
> CategoryC: Array[182], CategoryD: Array[171],
> CategoryE: Array[182], CategoryF: Array[183] }

to

Array [ Array[182], Array[182], Array[182], Array[182], Array[182], Array[182] ]

I tried .replace(/"/g, ""); but I'm getting that replace is not a function.

JSON.stringify and JSON.parse didn't help me and a for loop

for (var i = 0; i < data.length; i++) {
    data2[i] = data[i].replace(/"/g, "");
}
console.log(data2);

returns double quotes.

UPDATE

This is how my json looks like

{"CategoryA": ["297,239", "277,227", "279,310", "297,766"],
 "CategoryB": ["15,479,207", "14,845,266", "15,454,549"],
 "CategoryC": ["285,648", "295,982", "300,306", "302,508"]
}

Ismail RBOUH · Accepted Answer · 2016-07-17 16:14:48Z

6

You can use map in combination with Object.keys like this:

var result = Object.keys(yourObject).sort().map(function(key) {
    return yourObject[key].map(function(num) {
        return +num.replace(/,/g, '');
    });
});

Please note that the comma , in your numbers it's for formatting, not a floating point.

var yourObject = {"CategoryA": ["297,239", "277,227", "279,310", "297,766"],
 "CategoryB": ["15,479,207", "14,845,266", "15,454,549"],
 "CategoryC": ["285,648", "295,982", "300,306", "302,508"]
} ;

var result = Object.keys(yourObject).sort().map(function(key) {
    return yourObject[key].map(function(num) {
      return +num.replace(/,/g, '');
    });
});

console.log(result);

Thank you @Rayon.

edited Jul 17, 2016 at 16:14

answered Jul 17, 2016 at 15:31

Ismail RBOUH

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12 Comments

rpadovani Over a year ago

Right. OP: Be careful Object.keys returns the properties of an object in an arbitrary order, so the result of this operation can change over time

Rayon Over a year ago

What about "without double quotes" ?

jimakos17 Over a year ago

Thank you for your reply but as Rayon said this returns double quotes and changes the order. I would prefer if I could keep CategoryA, CategoryB etc. as well.

rpadovani Over a year ago

@jimakos17 an object doesn't have an order. Do you mean alphabetical order?

Rayon Over a year ago

@IsmailRBOUH – How about ARRAY.map(Number) ?

|

Nina Scholz · Accepted Answer · 2016-07-17 16:14:44Z

1

You could sort the keys (to maintain alphabetical order) and apply a replace for changing the comma to point and a casting to number.

var object = { "CategoryA": ["297,239", "277,227", "279,310", "297,766"], "CategoryB": ["15,479,207", "14,845,266", "15,454,549"], "CategoryC": ["285,648", "295,982", "300,306", "302,508"] },
    array=  Object.keys(object).sort().map(function(k) {
        return object[k].map(function (a) {
            return +a.replace(/,/g, '');
        });
    });

console.log(array);

edited Jul 17, 2016 at 16:14

answered Jul 17, 2016 at 15:45

Nina Scholz

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2 Comments

jimakos17 Over a year ago

Thank you for your answer @Nina but my values are shown NaN with your reply as well.

Nina Scholz Over a year ago

please add your original object.

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