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
在应用程序开发的上下文中，“引导”通常在讨论模块化和/或自动更新软件时出现。
而不是用户下载整个应用程序，包括他不需要的功能，并重新下载和手动更新它，只要有更新，用户只下载和启动一个小的“引导”可执行文件，它反过来下载和安装用户需要的应用程序的那些部分。此外，引导组件能够在每次启动时查找更新并安装它们。
其他回答
参见维基百科关于引导的文章。
有一个部分和链接解释了它在计算中的含义。它在这个领域有四种不同的用途。
这里有一些引用，但要更深入的解释和其他含义，请参考上面的链接。
＂...是一种技术，通过一种简单的计算机程序激活一个更复杂的程序系统。” “自举一词的另一种用法是使用编译器来编译自己，首先用现有语言编写一种新编程语言的编译器的一小部分，然后用新语言编写更多的新编译器程序。”
在应用程序开发的上下文中，“引导”通常在讨论模块化和/或自动更新软件时出现。
而不是用户下载整个应用程序，包括他不需要的功能，并重新下载和手动更新它，只要有更新，用户只下载和启动一个小的“引导”可执行文件，它反过来下载和安装用户需要的应用程序的那些部分。此外，引导组件能够在每次启动时查找更新并安装它们。
引导文件负责加载主文件的内容。它是主文件的包装器。这样，如果由于某种原因加载文件不成功，我们就可以捕获错误。
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".
Boot strapping the dictionary meaning is to start up with minimum resources. In the Context of an OS the OS should be able to swiftly load once the Power On Self Test (POST) determines that its safe to wake up the CPU. The boot strap code will be run from the BIOS. BIOS is a small sized ROM. Generally it is a jump instruction to the set of instructions which will load the Operating system to the RAM. The destination of the Jump is the Boot sector in the Hard Disk. Once the bios program checks it is a valid Boot sector which contains the starting address of the stored OS, ie whether it is a valid MBR (Master Boot Record) or not. If its a valid MBR the OS will be copied to the memory (RAM)from there on the OS takes care of Memory and Process management.
