I am interested in creating a JSON array where I can define the fields and add data to it later in my code. However, I am unsure about the correct syntax to achieve this. So far, my attempts have resulted in some parse errors;
<script>
var myJSONArray = [
{item: , cost: , quantity: }; // Setting up the array for future population
]
and then at a later stage ....
myJSONArray.push(milk,1.99,2); // Adding different items into the array fields
To start, this is a JavaScript array.
Begin by creating your array and then inserting objects into it:
let shoppingList = [];
shoppingList.push({
item: 'bread',
cost: 2.49,
quantity: 1
});
One way to customize an object is by incorporating a function that enables you to modify its properties.
<script>
var customizedObject = {
updateProperty: function(propertyName, value) {
this.property = {"name": propertyName, "value": value}
return true;
},
property: {name: "", value: 0}
}
// Example:
customizedObject.updateProperty("Color", "Blue");
console.log(customizedObject.property); // outputs {name: "Color", value: "Blue"}
</script>
If you are aiming to generate a JSON array (currently using a JavaScript array that consists of a JavaScript object), the JSON.stringify method can be utilized.
Implementing the code from Andy :
var newArray = [];
newArray.push({
item: 'bread',
cost: 2.49,
quantity: 1
});
// Displays the JavaScript Array as a JSON array :
console.log(JSON.stringify(newArray));
The JSON.stringify function will provide a String representation of a JavaScript value in JSON format. It can be further parsed with another program or saved into a new .json file if necessary.
UPDATE : The result of the previous code :
'[{"item":"bread","cost":2.49,"quantity":1}]'
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