pivot.js

[ 
{ day:'wednesday',
	events: [{
		time: "7:00 AM",
		task: 'do something'}
	]},
{ day:'wednesday',
	events: [{
		time: "8:00 AM",
		taks : 'do something'}
	]},
{ day:'thursday',
	events: [{
		time: "7:00 AM",
		task : 'do something else'}
	]},
{ day:'friday',
	events: [{
		time: "7:00 AM",
		task : 'do something'}
	]},
]

transform to ->

[
{ 	time:"7:00 Am",
	task: :"do something",
	days: ["wednesday","friday"]
}
{ 	time:"7:00 Am",
	task: :"do something else",
	days: ["thursday"]
},
{
	time:"8:00 AM",
	task:"do something",
	days: ["Wednesday"]
}
]