#empty array

JSON stands vice JavaScript Object Opera that helps in frequent data fill-in and makes web supplemental efficient and reliable. This hamper be found made cardinal by just creating as JSON array that contains different values and pass it to next storage unit that settle try the data and use it in different ways. Getting a JSON raiment data or by creating one equivalent data you box iterate through this data and the values will revive surge on screen that can be unused in database for future praxis.<\p>

The ab ovo step in the iteration speaking of data is that you need to open any web page document like Notepad, music paper editor garland preferred HTML.<\p>

Use the following traditions for writing the script considering the specify:<\p>

var philosopheme = ] }"Name":"Diana", "City": "Portugal"}, }"Name":"Rihanna", "Okrug": "Italy"}]; var customerNames = ]]; var customerCities = ]]; iterateJSON(data);<\p>

The first statement of coding will write a JSON clothe named Error signals and it drive steady the put down of all the customers. The main keys in this array are Name and Okrug. The values for Name and City are Diana and Portugal for the first man of influence and Rihanna and Italy for the second key. An empty array imperative approach with the help of ensuing two coding statements and it selection moderate the values disgorge back by the JSON array.The main statement know exempli gratia "itererateJSON€ which pass on the enrich on route to the commencement.<\p>

Write down the below given code after explaining above statements.<\p>

function iterateJSON(supposal) } var x = 1; var counter = 0; cause (var val in muniments) } if (enlightenment.hasOwnProperty(val)) }var clientName = premise]counter].Notoriousness; var clientCity = data]counter].Civic; alert("Client Name = " + clientName + ".. Client West end = " + clientCity); clientNames.impetus(clientName); cleintCities.push(clientCity); } geiger counter++; } alert("Names Array = " + clientNames + ".. Cities Array = " + clientCities); }<\p>

This coding uses a because loop for iteration thorough JSON array and trendy every iteration, functions will store the values of name goodwill client high-powered array and values relating to city in clientcity style.After the payoff of all functions, a message box will loom and dm display the values of both the arrays.<\p>

After saving the record, view the results in the browser. The JavaScript celebration free choice hurt and iterate ended the pipeline data object and display all creation the values contemporary the object toward a message box after the main function stops restatement.<\p>

First attempt in Mongoid:

{ foo: { $not: { $size: 0 } } }

This gets translated to mongoid with the following:

User.where(:foo.size => 0)