studying_qlik_currApp.js

    g.currApp = function(e) {
        var n;
        return (n = e && e.backendApi && e.backendApi.model.session && e.backendApi.model.session.currentApp ? 
			//if there's e.backendApi.model.*session*.currentApp, then assign to n
			e.backendApi.model.session.currentApp 
			//else if there's not assign ...
			: e && e.backendApi && e.backendApi.model.app ? 
				//if there is e.backendApi.model.*app*
				e.backendApi.model.app : 
				//else assign to t.current
				t.current) ? 
					//if `n` has some value, then:
					(x || (x = new g(n)), x.model === n ? 
					 	//if  x.model is n, then: return x
					 	x 
					 	//else if x.model is not n, then: return new instance
					 	: new g(n)) 
					: null
    }
    
    
    
    {
    g: 'represents the qlik object; can use with `new`; g is the function at start of `apis/qapp` , has properties like `global`, `bookmark`, `visualization`, `theme`, has functions assigned to its `prototype`. However currApp and openApp are not defined on `prototype`',
    e: 'represents argument passed in; I never use it that way; only call currApp(...)' +
	    'Since e never has a value then it falls through all safety checks and expects t.current to have a value',
    t: 'represents  core.models/app : define("apis/qapp", ["core.utils/deferred", "core.models/app", ...], function(e, t, ...'+
	    'Notice that if `t.curent` doesnt have a value, it will return null. We can move past currApp to understand t better; core.models/app'
   
    }