Question

I have a json string like 
{
"Msg1": "message 1",
"Msg2": "message 3",
"Msg3": "message 2"
}

I am using the folowing code

  function GetMessages(msg) {
   $.getJSON("./jquery/sample.json", function (result) {
        $.each(result, function (key, val) {
            if (key == msg) {
                alert(val);
            }
        });
}

Is there any other way to check if my key exists in the result array & get its value without using a foreach loop ? Can eval() do something ?

Answer 1

If you know the property name you could access it directly and you don’t need to be looping through its properties:

var msg = 'Msg2';

$.getJSON('./jquery/sample.json', function (result) {
    alert(result[msg]);
});