JSON Array Literals
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This is a JSON string:
'["Ford", "BMW", "Fiat"]'
Inside the JSON string there is a JSON array literal:
["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.
JavaScript Arrays
You can create a JavaScript array from a literal:
Example
myArray = ["Ford", "BMW", "Fiat"];
Try it Yourself »
You can create a JavaScript array by parsing a JSON string:
Example
myJSON = '["Ford", "BMW", "Fiat"]';
myArray = JSON.Parse[myJSON];
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myArray = JSON.Parse[myJSON];
Accessing Array Values
You access array values by index:
Example
myArray[0];
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Arrays in Objects
Objects can contain arrays:
Example
{
"name":"John",
"age":30,
"cars":["Ford", "BMW", "Fiat"]
}
"name":"John",
"age":30,
"cars":["Ford", "BMW", "Fiat"]
}
You access array values by index:
Example
myObj.cars[0];
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Looping Through an Array
You can access array values by using a for in loop:
Example
for [let i in myObj.cars] {
x += myObj.cars[i];
}
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x += myObj.cars[i];
}
Or you can use a for loop:
Example
for [let i
= 0; i < myObj.cars.length; i++] {
x += myObj.cars[i];
}
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x += myObj.cars[i];
}
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