I have an array containing dates, I want to iterate over the array to get a count for how many times a date appears. I want the data to be displayed in a chart so the result needs to be in the form 

```
data:[
    [count, date],
    [count, date],
    [count, date]
]

```

so that the count for each date is in an array with it.

I was having some difficulty trying to find a good way to do this, or if there was a method that I may have overlooked