Loop and get key/value pair for JSON array using jQuery
JavascriptJqueryJsonJavascript Problem Overview
I'm looking to loop through a JSON array and display the key and value.
It should be a simplified version of the following post, but I don't seem to have the syntax correct: jQuery 'each' loop with JSON array
I also saw the post Get name of key in key/value pair in JSON using jQuery?, but it also seemed like lots of code for a simple activity.
This illustrates what I'm looking for (but it doesn't work):
var result = '{"FirstName":"John","LastName":"Doe","Email":"[email protected]","Phone":"123 dead drive"}';
$.each(result, function(k, v) {
//display the key and value pair
alert(k + ' is ' + v);
});
There is no mandatory jQuery requirement, but it is available. I can also restructure the JSON if it cuts down the required code.
Javascript Solutions
Solution 1 - Javascript
You have a string representing a JSON serialized JavaScript object. You need to deserialize it back to a JavaScript object before being able to loop through its properties. Otherwise you will be looping through each individual character of this string.
var resultJSON = '{"FirstName":"John","LastName":"Doe","Email":"[email protected]","Phone":"123 dead drive"}';
var result = $.parseJSON(resultJSON);
$.each(result, function(k, v) {
//display the key and value pair
alert(k + ' is ' + v);
});
Solution 2 - Javascript
var obj = $.parseJSON(result);
for (var prop in obj) {
alert(prop + " is " + obj[prop]);
}
Solution 3 - Javascript
You can get the values directly in case of one array like this:
var resultJSON = '{"FirstName":"John","LastName":"Doe","Email":"[email protected]","Phone":"123 dead drive"}';
var result = $.parseJSON(resultJSON);
result['FirstName']; // return 'John'
result['LastName']; // return ''Doe'
result['Email']; // return '[email protected]'
result['Phone']; // return '123'
Solution 4 - Javascript
The following should work for a JSON returned string. It will also work for an associative array of data.
for (var key in data)
alert(key + ' is ' + data[key]);
Solution 5 - Javascript
Parse the JSON string and you can loop through the keys.
var resultJSON = '{"FirstName":"John","LastName":"Doe","Email":"[email protected]","Phone":"123 dead drive"}'; var data = JSON.parse(resultJSON);
for (var key in data)
{
//console.log(key + ' : ' + data[key]);
alert(key + ' --> ' + data[key]);
}
Solution 6 - Javascript
The best and perfect solution for this issue:
I tried the jQuery with the Ajax success responses, but it doesn't work so I invented my own and finally it works!
Click here to see the full solution
var rs = '{"test" : "Got it perfect!","message" : "Got it!"}';
eval("var toObject = "+ rs + ";");
alert(toObject.message);