Created
October 21, 2013 07:35
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JS Core: Task 2. Objects Session
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| (function () { | |
| /** | |
| * Gets the object value from the session storage or cookies and displays the result | |
| */ | |
| window.onload = function() { | |
| var resultBox = document.getElementById('result'), //gets the DOM element where results are stored | |
| key = 'person', // the key name of the object | |
| result = sessionDataManager.getObject(key); //gets the value of the object from session storage or from cookies | |
| // appends the reult to the resultBox element | |
| if (result) { | |
| resultBox.innerHTML = 'The object "' + key + '" has properties: <br/>' + printObject(result).join(', '); | |
| } | |
| else { | |
| resultBox.innerHTML = 'Cookie or session store item with the name"' + key + '" doesn\'t exist.'; | |
| } | |
| /** | |
| * Gets the array of the object properties and their values | |
| * @returns {Array} - the array of the object properties and their values | |
| */ | |
| function printObject(object){ | |
| var collection = [], index = 0, next; | |
| for(var item in object){ | |
| /* Checks if the object has property "item", it's important to use method hasOwnProperty() | |
| when iterating over object properties to filter out properties that come with prototype inheritance */ | |
| if(object.hasOwnProperty(item)){ | |
| next = object[item]; | |
| /*Checks if the property of the object is the object itself and is not null. | |
| If it's true the function is called recursively, as it is unknown the depth of nesting in the object. | |
| Otherwise the result is assigned to the item of the array "collection"*/ | |
| if(typeof next === 'object' && next !== null){ | |
| collection[index++]= item + ': { ' + printObject(next).join(', ') + '} '; | |
| } | |
| else collection[index++] = [item + ': ' + next.toString()]; | |
| } | |
| } | |
| return collection; | |
| } | |
| } | |
| })(); |
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