Below sample code demonstrate on how to read/write dictionary in JS world.

Creating & Adding data to Dictionary

var workOrderDictionary = []; // declare dictionary

var companyId1 = 1;
var orders1 = [{ ProductId: 10, ProductName: Pen } , {ProductId: 20, ProductName: Eraser} ]
workOrderDictionary.push({ key: companyId1, value: orders1 });

var companyId2 = 2;
var orders2 = [{ ProductId: 101, ProductName: Lunch-Box } , {ProductId: 20, ProductName: Bottle } ]
workOrderDictionary.push({ key: companyId2, value: orders2 });

Reading the data from Dictionary

for (var key in workOrderDictionary) {
	if (workOrderDictionary.hasOwnProperty(key)) {
	    var orders =	workOrderDictionary[key];
	}
}

Happy Kooding… Hope this helps…!