helper.js

({
	//Global variables 
	$projects:{},
	$employees: {},
	$manager: {},

	doInit : function(cmp) {

		this.$projects = this.initAutoComplete(cmp, 'projects', ["Project1", "Project2", "Project3"]);
		this.$employees = this.initAutoComplete(cmp, 'employees', ["Emp1", "Emp2", "Emp3"]);
		this.$manager = this.initAutoComplete(cmp, 'manager', ["Manager1", "Manager2", "Manager3"]);

	},

	initAutoComplete : function(cmp, eleClass, data) {

		//Method of Jquery plugin
		$exampleMulti = $("." + eleClass).select2({  
		     placeholder: "Select a user",
		     data: data,
		     maximumSelectionLength: 4,
		});
		return $exampleMulti;
	},

	save : function(cmp){
		
		//accessing variables values which were set in doInit method w/o passing them. 
		console.log('projects', this.$projects.val());
		console.log('emp', this.$employees.val());
		console.log('manager', this.$manager.val());

	}    
})