What is the best way to extract the value associated with the first_name key from the object below?
{
"first_name": "D",
"last_name": "N",
"phone_number": 1233414234
}
What is the best way to extract the value associated with the first_name key from the object below?
{
"first_name": "D",
"last_name": "N",
"phone_number": 1233414234
}
Whether using dot notation or bracket notation. Explore more on property accessors.
var object = { first_name: "D", last_name: "N", phone_number: 1233414234 };
// accessing with dot notation
console.log(object.first_name);
// accessing with bracket notation
console.log(object['first_name']);When dealing with an array of objects, consider utilizing Array#map-
var array = [{"first_name":"D","last_name":"N","phone_number": 1233414234},{"first_name":"P","last_name":"T","phone_number": 1233414234}],
first_names = array.map(function (a) {
return a.first_name;
});
console.log(first_names);To access values in an object in JavaScript, you can use either dot notation or bracket notation.
var x = {"first_name":"D","last_name":"N","phone_number": 1233414234};
alert(x.first_name);
alert(x['first_name']);
For more information on objects in JavaScript, check out this link.
UPDATE
If you need to iterate through objects in an array, you can utilize the 'each' method as shown below:
var array = [{"first_name":"D","last_name":"N","phone_number": 1233414234},{"first_name":"P","last_name":"T","phone_number": 1233414234}];
$.each(array, function(idx) {
alert(array[idx].first_name);
});
Alternatively, you can also use the following code:
var array = [{"first_name":"D","last_name":"N","phone_number": 1233414234},{"first_name":"P","last_name":"T","phone_number": 1233414234}];
$.each(array, function(idx, obj) {
alert(obj.first_name);
});
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