Shulou(Shulou.com)06/03 Report--

This article mainly explains "how to check whether a given element exists in the javascript array". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to check whether a given element exists in the javascript array.

1. Use the for statement to traverse the array, and use = = in each loop to determine whether the array element is a given value.

When the first element satisfies the condition, there is a given element in the array, give a prompt, and then use the breakstatement to exit the entire loop.

Var fruits = ['Apple', 'banana', 'durian', 'orange', 'jackfruit', 'pear']; for (var item0 if (fruits [I] = "durian") {console.log ("specified element'" + fruits [I] + "'exists"); break;}}

2. Use the includes () of the array to determine whether the array contains the specified value, and if it returns true, otherwise false.

Var fruits = ['Apple', 'banana', 'durian', 'orange', 'jackfruit', 'pear']; if (fruits.includes ('durian') {console.log ("given element exists");} else {console.log ("given element does not exist") } at this point, I believe you have a better understanding of "how to check whether a given element exists in the javascript array". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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.