Shulou(Shulou.com)06/01 Report--

Xiaobian to share with you how js selects an element from the array, I believe most people still do not know how, so share this article for everyone's reference, I hope you have a lot of harvest after reading this article, let's go to understand it together!

Select an element from an array

For this task, we have several ways, one is to use forEach combination if-else, another can use filter method, but the disadvantages of using forEach and filter are:

In forEach, we're going to do extra traversal of the other unwanted elements and use the if statement to extract the desired value.

In the filter method, we have a simple comparison operation, but it will return an array, instead we want to get a single object from the array based on the given condition.

To solve this problem, we can use the find function to find the exact element from the array and return that object, where we do not need to use the if-else statement to check whether the element satisfies the condition.

const data = [ {id: 1, name: 'Lemon'}, {id: 2, name: 'Mint'}, {id: 3, name: 'Mango'}, {id: 4, name: 'Apple'} ] const value = data.find(item => item.name == 'Apple')// value = {id: 4, name: ' Apple'} The above is "js how to select an element from an array" All the content of this article, thank you for reading! I believe that everyone has a certain understanding, hope to share the content to help everyone, if you still want to learn more knowledge, welcome to pay attention to the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.