I've got an array:
myArray = [{'id':'73','foo':'bar'},{'id':'45','foo':'bar'}, etc.]
I'm unable to change the structure of the array. I'm being passed an id of 45
, and I want to get 'bar'
for that object in the array.
How do I do this in JavaScript or using jQuery?
Answer: Use the find() Method You can simply use the find() method to find an object by a property value in an array of objects in JavaScript. The find() method returns the first element in the given array that satisfies the provided testing function. If no values satisfy the testing function, undefined is returned.
Overview. In JavaScript, we can use the Array. prototype. find() method to find an object by ID in an array of objects.
Use the find()
method:
myArray.find(x => x.id === '45').foo;
From MDN:
The
find()
method returns the first value in the array, if an element in the array satisfies the provided testing function. Otherwiseundefined
is returned.
If you want to find its index instead, use findIndex()
:
myArray.findIndex(x => x.id === '45');
From MDN:
The
findIndex()
method returns the index of the first element in the array that satisfies the provided testing function. Otherwise -1 is returned.
If you want to get an array of matching elements, use the filter()
method instead:
myArray.filter(x => x.id === '45');
This will return an array of objects. If you want to get an array of foo
properties, you can do this with the map()
method:
myArray.filter(x => x.id === '45').map(x => x.foo);
Side note: methods like find()
or filter()
, and arrow functions are not supported by older browsers (like IE), so if you want to support these browsers, you should transpile your code using Babel (with the polyfill).
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With