How JavaScript flattens multidimensional arrays

This article will explain in detail how JavaScript flattens the multidimensional array. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Flattened multidimensional array

Just use the unfold operator.

Var entries = [1, [2, 5], [6, 7], 9]; var flat_entries = [] .concat (.. desktop); / / [1, 2, 5, 6, 7, 9] what are the characteristics of JavaScript 1. Js belongs to an interpretive scripting language; 2. With the support of most browsers, js can run on multiple platforms and has cross-platform characteristics. 3. Js belongs to a weak type scripting language, which does not make strict requirements for the data types used, and can convert types, which is simple and easy to use; 4. Js language has high security, and it can only browse information or interact dynamically through the browser, thus effectively preventing the loss of data; 5, object-based scripting language, js can not only create objects, but also use existing objects.

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