Javascript Get Sequential Dates in Array

Question

I have an array with the following values (example):

   [
      1367848800000: true,
      1367935200000: true,
      1368021600000: true,
      1368108000000: true,
      1368194400000: true,
      1368367200000: true,
      1368540000000: true,
      1368626400000: true,
      1368712800000: true
    ]

Where the index is a date time. The date time will always be at 12:00:00 on a date.

In this example, the first five dates are consecutive, then one day by itself, and then another group of 3 dates. An example of what I mean is below.

Now, what I am trying to do is find sequential dates and put them into an array as follows:

   [
      1367848800000,
      1367935200000,
      1368021600000,
      1368108000000,
      1368194400000
   ],
   [
      1368367200000,
      1368540000000,
      1368626400000,
   ],
   [
      1368712800000Ω
   ]

So in the end, I have an array, with 3 arrays of all the times. I have tried numerous pieces of code, but everything bugs out and nothing is worth posting on here. Any help would be much appreciated!

Answer 1

The following approach uses array .reduce() method:

var arr = [1367848800000, 1367935200000, 1368021600000,
           1368108000000, 1368194400000, 1368367200000,
           1368540000000, 1368626400000, 1368712800000],
    i = 0,
    result = arr.reduce(function(stack, b) {
        var cur = stack[i],
            a = cur ? cur[cur.length-1] : 0;

        if (b - a > 86400000) {
            i++;
        }

        if (!stack[i])
            stack[i] = [];

        stack[i].push(b);

        return stack;
    }, []);

console.log(result);

DEMO: http://jsfiddle.net/gbC8B/1/