To extract a value from a JSON array, I am utilizing the find method in this manner:
let actualElm = this.initialData.find(elm => {
if (elm.identifiant == this.actualId) {
return elm.country;
}
});
An issue with using find is that it returns the entire object (elm object), when all I need is elm.country.
Is there a better approach to achieve my desired result?
To simplify your use of the Array#find method, you can directly call .country afterwards:
let selectedElement = this.initialData.find(elm => elm.identifiant == this.selectedId).country;
If there is a possibility for your find() method to fail in certain scenarios, it's recommended to include a fail-safe check like (... || {}):
let selectedElement = (this.initialData.find(elm => elm.identifiant == this.selectedId) || {}).country;
When using the find method on an array, it will search for elements that meet a specific condition and return the first one found. Typically, this is done by providing a callback function that evaluates each element.
For instance, in the provided code snippet, the find method is used to find an element with a particular identifier and retrieve its country property if it exists.
let selectedElement = this.initialData.find(element => element.identifiant == this.actualId);
let actualCountry = (selectedElement || {}).country;
It's important to note that the find method may return undefined if no matching element is found, hence the need to validate the result before accessing properties.
The find method in JavaScript takes a function that evaluates to true or false, determining if the current element meets a certain condition. If true, the entire element is returned.
Here is a helpful link for more information on the find method: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
If you want to achieve a similar result, you can also use the forEach method.
The behavior described pertains to the Array.prototype.find() method. This method will return the first element for which the callback function evaluates to a truthy value. In the context provided, the callback function returns the country property, which is considered a truthy value. However, it's important to note that despite this, the find() method will still return the entire object.
If you are certain that a result will always be found, you can simply use the following approach:
let country = this.initialData.find(e => e.identifiant == this.actualId).country;
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