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

This article introduces the knowledge of "how the JS array returns the first element of a given condition". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Use the for loop to traverse the array and determine whether the array elements meet the conditions in each loop.

When the first element meets the condition, it is output immediately, and then exit the entire loop using the breakstatement.

Var ages = [3, 10, 18, 20]; for (var iTunes I if (ages [I] > = 18) {console.log (ages [I]); break;}}

2. Use the find () method to call the function once for each element in the array.

In the callback function, the given added filter element is used to return the first element that passes the detection.

Function checkAdult (age) {return age > = 18;} var ages = [3,10,18,20]; var age=ages.find (checkAdult); console.log (age); "how the JS array returns the first element of a given condition". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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