I keep seeing "bootstrapping" mentioned in discussions of application development. It seems both widespread and important, but I've yet to come across even a poor explanation of what bootstrapping actually is; rather, it seems as though everyone is just supposed to know what it means. I don't, though. Near as I can figure, it has something to do with initialization tasks required of an application upon launch, but I could be completely wrong about that. Can anyone help me to understand this idea?
当前回答
亚历克斯,这和你的电脑启动时做的差不多。('Booting' a computer实际上来自于单词bootstrapping)
最初,运行BIOS中的小程序。它包含足够的机器代码来加载和运行一个更大、更复杂的程序。
第二个程序可能是类似于NTLDR(在Windows中)或LILO(在Linux中)的程序,然后执行并能够加载,然后运行操作系统的其余部分。
其他回答
就使用流行的Twitter Bootstrap而言,我觉得这种类型的Bootstrap是一种将模块化组件集成到Web应用程序中的操作,而Web应用程序甚至不必在需要或引用它之前承认模块化组件的存在。
开发人员只需将CSS Twitter Bootstrap主题的默认副本加载(引用)到Web应用程序中,就可以无缝地集成它。Vuola !然后,您可能需要重写其中的一些更改,但是您可以这样做,即资源/组件不受影响,并且完全可重用。
Web开发人员如何实现jQuery api等也是同样的概念,但开发人员并没有真正表示为引导本身。它所做的是提高灵活性和可重用性,同时允许应用程序的不同组件/资源的隔离自由驻留在同一服务器或CDN上。
注意:在计算引导处理MBR,在UNIX中,它需要一个特殊的引导加载程序或管理器,这是ROM中的一个小程序,将操作系统加载到RAM中。如果你想一下,同样的概念发生在引导加载程序检查MBR并根据这个表加载操作系统的动作中,而操作系统对此一无所知。
问题已经回答了。用于网页开发。 到目前为止,我在Laravel文档中找到了一个关于引导的很好的解释。这是链接
一般来说,我们指的是注册事物,包括注册服务 容器绑定、事件监听器、中间件,甚至路由。
希望对学习web应用程序开发的人有所帮助。
I belong to the generation who flipped switches to enter a boot program. In the early 1980s, I worked on a microcomputer called Micro-78, developed by Electronics Corporation of India Ltd (ECIL). It was a sort of clone of Altair 8800. I distinctly remember what happens when a small boot program was entered using the toggle switches and executed by pressing a button. The program reads a second boot program contained in the 1st track of the floppy disk and overwrites it on itself in such a way that the second boot program starts executing to load a disk operating system. I think the term "bootstrap" refers to this process of the first boot program reading and overwriting the second boot program on itself, in a way "pulling itself up" with the additional functionality of the second boot program. That may be the origin of the original meaning of "the bootstrap program".
“Bootstrapping”来源于“靠自己的力量把自己拉起来”这个词。这些你可以从维基百科上得到。
在计算中,引导加载程序是机器启动时运行的第一段代码,负责加载操作系统的其余部分。在现代计算机中,它存储在ROM中,但我记得PDP-11上的引导过程,你可以通过前面板开关插入位来将特定的磁盘段加载到内存中,然后运行它。不用说,引导加载程序通常非常小。
“Bootstrapping”也被用作一个术语,用于构建一个使用自身的系统——或者更准确地说,是一个前身版本。例如,ANTLR版本3使用在ANTLR版本2中开发的解析器编写。
除了它在软件开发中的应用(例如kdgregory给出的答案)和Dirk Eddelbuettel所讨论的在统计学中的应用之外,在强化学习的上下文中,Bootstrapping还有另一个对开发人员有用的含义。
来自萨顿和巴托:
Widrow, Gupta, and Maitra (1973) modified the Least-Mean-Square (LMS) algorithm of Widrow and Hoff (1960) to produce a reinforcement learning rule that could learn from success and failure signals instead of from training examples. They called this form of learning “selective bootstrap adaptation” and described it as “learning with a critic” instead of “learning with a teacher.” They analyzed this rule and showed how it could learn to play blackjack. This was an isolated foray into reinforcement learning by Widrow, whose contributions to supervised learning were much more influential.
这本书描述了各种强化算法,其中目标值是基于先前的近似作为bootstrap方法:
最后,我们注意到 DP[动态规划]方法的最后一个特殊性质。所有这些都更新了估计 基于对继承者价值的估计的状态值 州。也就是说,他们在其他数据的基础上更新估计 估计。我们把这叫做引导。许多钢筋 学习方法执行引导,即使是那些没有引导的方法 要求,正如DP要求,一个完整和准确的模型 环境。
请注意,这不同于维基百科页面上提到的自举聚合和智能爆炸。