How to add new data from array of string to array of object sequentially?

Question

Suppose I have array of object:

originalData = [
  {
    "id": 1
  },
  {
    "id": 2
  },
  {
    "id": 3
  },
  {
    "id": 4
  },
  {
    "id": 5
  },
  {
    "id": 6
  }
]

And I have array of string:

newData = ['1','2','3']

How do I push newData to originalData sequentially?

Expected result should be like so:

originalData = [
  {
    "id": 1,
    "color":'1'
  },
  {
    "id": 2,
    "color":'2'
  },
  {
    "id": 3,
    "color":'3'
  },
  {
    "id": 4,
    "color":'1'
  },
  {
    "id": 5,
    "color":'2'
  },
  {
    "id": 6,
    "color":'3'
  }
]

Here's my workaround:

originalData.forEach(function (object,i) {
    object.color = newData[i]
});

@JuanMendes, Because the workaround would only set color to the first 3 members of the originalData. The rest members would have the color set to undefined. — Random Integer
– Random Integer, Commented Mar 5, 2017 at 11:20

Random Integer · Accepted Answer · 2016-09-29 00:27:10Z

1

Use a variable j and reset it over time.

var j = 0;
originalData.forEach(function (object,i) {
    object.color = newData[j];
    j += 1;
    if(j > newData.length)
        j = 0;
});

edited Sep 29, 2016 at 0:27

answered Sep 29, 2016 at 0:18

Random Integer

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1 Comment

Ruan Mendes Over a year ago

What's different between this and what the OP posted?

kk. · Accepted Answer · 2016-09-29 00:33:59Z

0

Reset the counter dynamically depending on the newData array length.

originalData = [{"id": 1},{"id": 2},{"id": 3},{"id": 4},{"id": 5},{"id": 6}];
newData = ['1','2','3'];
for(var i = 0, j=0; i < originalData.length; i++, j++) {
    originalData[i].color = newData[j];
    if(j == newData.length -1){
        j = -1;
    }
}

console.log(originalData);

answered Sep 29, 2016 at 0:33

kk.

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