何时web开发过程中使用位运算符？ [英] When to use Bitwise Operators during webdevelopment?

问题描述

虽然我把握位运算符的概念，我不能说，我在过程中，我不得不求助于使用位运算符的web开发过程中遇到许多用例。

Although I grasp the concept of Bitwise Operators, I can't say that I have come across many use cases during the webdevelopment process at which I had to resort to using Bitwise Operators.

• 请您使用位运算符？


• 为什么要使用它？


• 什么是一些示例使用案例？

请记住，这个问题是专门用于使用位运算符的网络语言。

Please remember that this question is specifically intended for use of Bitwise Operators in web languages.

推荐答案

我对位运算符的主要用途可能是相关的任何地方 - 再presenting一组标志。例如，你可能会在数据库中重新presenting一组安全权限用户的整数，并在你的web应用程序，你将不得不继续之前检查这些。

My main use for bitwise operators could be relevant anywhere - representing a set of flags. For instance, you might have an integer in the database representing a set of security permissions for a user, and in your web app you would have to check those before continuing.

这些往往只需要＆放大器; 和 | - 例如

Those tend to only require & and | - e.g.

if ((permissions & Permission.CreateUser) != 0)
{
    ...
}

或

Permission requiredPermission = Permission.CreateUser
                                | Permission.ChangePassword;

位的移动的运营商都在我的经验，经营的应用不太有用。

Bit shifting operators are less useful in "business" applications in my experience.

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