如何在 JS 中使用流

Question

I want to manipulate arrays in JS in a similar fashion with Java Streams .

So

arr.map().map().map()

Will do only one iteration.

How can I achieve that without a library?

Answer 1

This is similar to LINQ in DotNet. And there are a lot of library that do that for you already.

You might want to check out linq.js. It follows the .NET lambda syntax and looks to be well integrated in a Microsoft environment.

LINQ for JavaScript -

Pros

• Implements all .NET 4.0 methods Complete lazy evaluation Full
• IntelliSense support for VisualStudio Supports jQuery Supports
• Windows Script Host Binding for Reactive Extensions for
• JavaScript(RxJS) and IntelliSense Generator NuGet install support
• Updated recently (last release Jan 2011) Syntax conforms to lambda
• syntax in C#

Cons

• The linq.js library is a little large.
• If you are already using jQuery or other js library, the most commonly used functionality is probably already available. See especially jQuery's filter, and 'Any' methods.

Others Similarly Library are:

• You can also check Rx for Javascript

• For a very nice, complete set of functional list operations, try: http://osteele.com/sources/javascript/functional/

• For more information on how to use just javascript to manipute your list, Please check https://gist.github.com/DanDiplo/30528387da41332ff22b