Shulou(Shulou.com)06/02 Report--

This article mainly introduces "what is the method of removing the weight of the array using set by javascript". In the daily operation, I believe that many people have doubts about the method of removing the weight of the array using set in javascript. The editor consulted all kinds of data and sorted out a simple and easy-to-use method of operation. I hope it will be helpful to answer the doubt that "javascript uses set to remove the weight of the array". Next, please follow the editor to study!

Methods: 1, use the set object to match the array "Array.from ()" method to remove the array, the syntax "Array.from (new Set (arr))"; 2, use the Set object to cooperate with the extension operator "…" To deduplicate the array, the syntax "[... new Set (arr)]".

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

The method of removing duplicates in arrays by javascript using set

In javascript, you can use the "Array.from ()" method of the set object to match the array for array deduplication.

Set is a new data structure provided by ES6, which is similar to an array, but does not have duplicate values. With this feature, we can convert the array to the Set type for deduplication, and then use the Array.from method to convert it back to the array.

The Array.from method is used to turn two types of objects into real arrays: array-like objects (array-like object) and iterable objects (including ES6's new data structures Set and Map).

Syntax:

Array.from (new Set (arr))

Example:

You can also use Set objects with extension operators. To do array deweighting.

Syntax:

[... new Set (arr)]

Example:

At this point, the study on "what is the method of javascript using set to remove the weight of arrays" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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.