Question

I have an array with values that have dates attached to them.

-x[0].value = 5,    x[0].time = "Mon 24 April 2012"
-x[1].value = 12,   x[1].time = "Mon 24 April 2012"
-x[2].value = 11,   x[2].time = "Mon 23 April 2012"
-x[3].value = 2,    x[3].time = "Mon 20 April 2012"
-x[4].value = 11,   x[4].time = "Mon 20 April 2012"
-x[5].value = 7,    x[5].time = "Mon 20 April 2012"
-x[6].value = 7,    x[6].time = "Mon 20 April 2012"

How do i create many arrays according to similar dates from this array. E.g. end of the day i want.

data1 array will contain:

-x[0].value = 5,    x[0].time = "Mon 24 April 2012"
-x[1].value = 12,   x[1].time = "Mon 24 April 2012"

data2 array will contain:

-x[2].value = 11,   x[2].time = "Mon 23 April 2012"

data3 array will contain:

-x[3].value = 2,    x[3].time = "Mon 20 April 2012"
-x[4].value = 11,   x[4].time = "Mon 20 April 2012"
-x[5].value = 7,    x[5].time = "Mon 20 April 2012"
-x[6].value = 7,    x[6].time = "Mon 20 April 2012"

Your help will be appreciated.

Answer 1

It is unclear from your question exactly what kind of result you are trying to achieve, but here is a function that will give you an array of arrays, one array for each time value:

var map = {}, i, time, temp, results;
for (i = 0; i < x.length; i++) {
    time = x[i].time;
    if (time in map) {
        // add this item to the array we already have for this time
        map[time].push(x[i]);
    } else {
        // create a new array for this time and put it in the map
        temp = [];
        temp.push(x[i]);
        map[time] = temp;
        results.push(temp);
    }
}

// here the variable results is an array of arrays, one for each time value