JSON Arrays
Arrays as JSON Objects
Example
[
"Ford", "BMW", "Fiat" ]
Arrays in JSON are almost the same as arrays in JavaScript.
In JSON, array values must be of type string, number, object, array, boolean or null.
In JavaScript, array values can be all of the above, plus any other valid JavaScript expression, including functions, dates, and undefined.
Arrays in JSON Objects
Arrays can be values of an object property:
Example
{
"name":"John",
"age":30,
"cars":[
"Ford", "BMW", "Fiat" ]
}
Accessing Array Values
You access the array values by using the index number:
Looping Through an Array
You can access array values by using a for-in loop:
Or you can use a for loop:
Nested Arrays in JSON Objects
Values in an array can also be another array, or even another JSON object:
Example
myObj =
{
"name":"John",
"age":30,
"cars": [
{ "name":"Ford",
"models":[ "Fiesta", "Focus", "Mustang" ] },
{ "name":"BMW", "models":[ "320", "X3", "X5" ] },
{ "name":"Fiat", "models":[ "500", "Panda" ] }
]
}
To access arrays inside arrays, use a for-in loop for each array:
Example
for (i in myObj.cars) {
x += "<h1>" + myObj.cars[i].name
+ "</h1>";
for (j in myObj.cars[i].models) {
x += myObj.cars[i].models[j];
}
}
Try it Yourself »
Modify Array Values
Use the index number to modify an array:
Delete Array Items
Use the delete keyword to delete items from an array:
