Json array get value by key javascript
There are two ways to access properties of objects:
Or, if you need to dynamically do it:
If you don't already have it as an object, you'll need to convert it. For a more complex example, let's assume you have an array of objects that represent users:
To access the age property of the second user, you would use Another example: That would access the 3rd element of an array named 2. Then, it would access 'key' in that array, go to the third element of that, and then access the property name As Amadan noted, it might be worth also discussing how to loop over different structures. To loop over an array, you can use a simple for loop:
To loop over an object is a bit more
complicated. In the case that you're absolutely positive that the object is a plain object, you can use a plain
(Note that
I've assumed whatever JS implementation you're using has Use the array filter function to get the JSON value for the key in JavaScript. Simple example code gets value for a key from nested JSON object in JavaScript. Output: JavaScript function that takes in one such object as the first argument, and a key string as the second argument.
Do comment if you have any doubts or suggestions on this JS JSON code.
Degree in Computer Science and Engineer: App Developer and has multiple Programming languages experience. Enthusiasm for technology & like learning technical. You can use the map() function or loop over them to either get the key and value from the JSON array object in JavaScript. Simple example code using a map. Output: Using loop JSON content is basically represented as an associative array in JavaScript. Just use for-loop over them to either read the key or the value.
Output: Do comment if you have any doubts or suggestions on this JS array topic.
Degree in Computer Science and Engineer: App Developer and has multiple Programming languages experience. Enthusiasm for technology & like learning technical. |