To set an array object in React using JSON if there is no pre-existing value, first initialize the state of the component to an empty array in the constructor like this:
constructor(props) {
super(props);
this.state = {
myArray: []
};
}
Then, in the component's render()
method or any other method, you can update the state by setting the array object using JSON syntax like this:
this.setState({
myArray: [
{ id: 1, name: 'John' },
{ id: 2, name: 'Jane' },
{ id: 3, name: 'Bob' },
]
});
This will set the myArray
state to an array of objects with three items, each with an id
and name
property. Note that you can replace the object properties and values with your own data as needed.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2021-11-09 11:00:00 +0000
Seen: 10 times
Last updated: Sep 29 '21
How can I add up the value of a different layer's field when it intersects with a polygon in QGIS?
What is the method for de-linearizing the value of the depth buffer?
What is the expected outcome of the math.floor function in terms of the return value?
What is the method to retrieve the value of a checkbox using react-hook-form?
What is the method for obtaining the value of a attribute using Xpath?
What does Rebase mean in a Smart Contract written in Solidity?