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Git log history simplification, elaborations example in git log's manual

由 白昼怎懂夜的黑 提交于 2019-12-24 15:33:18
问题 All of you comfortable with example and elaborations in git log's help for history simplification? I encounter some burdens on understanding when using this help/manual and the named example. .-A---M---N---O---P---Q / / / / / / I B C D E Y \ / / / / / `-------------' X I is the initial commit... foo exists with contents “asdf”, and a file quux exists with contents “quux”.... In A, foo contains just “foo”... B contains the same change as A... C does not change foo, but its merge N changes it

How to clear a FileDialog's dropdown history?

由 和自甴很熟 提交于 2019-12-24 12:26:09
问题 It seems that my application is remembering previously saved/opened files. How can clear the recent history and prevent the application from keeping track of saved/opened files in the future? I want to be able to do this from the application, without requiring client involvement. I suppose that the information is saved to the registry. 回答1: Where is recently opened files And then delete them: How to delete a registry value in C# 回答2: just: openfiledialog.FileName = ""; 来源： https:/

git命令

由 人走茶凉 提交于 2019-12-24 07:34:03
git命令 简述 安装 GitHub for Windows GitHub for Mac Git distributions for Linux and POSIX systems are available on the Git for All Platforms CONFIGURE TOOLING CREATE REPOSITORIES MAKE CHANGES GROUP CHANGES REFACTOR FILENAMES SAVE FRAGMENTS REVIEW HISTORY REDO COMMITS SYNCHRONIZE CHANGES 简述 Git is the open source distributed version control system that facilitates GitHub activities on your laptop or desktop. This cheat sheet summarizes commonly used Git command line instructions for quick reference. 安装 GitHub provides desktop clients that include a graphical user interface for the most common

linux，强大的history命令

由 不想你离开。 提交于 2019-12-24 07:07:56
如果你经常使用 Linux 命令行，那么使用 history（历史）命令可以有效地提升你的效率。本文将通过实例的方式向你介绍 history 命令的 15 个用法。 使用 HISTTIMEFORMAT 显示时间戳 当你从命令行执行 history 命令后，通常只会显示已执行命令的序号和命令本身。如果你想要查看命令历史的时间戳，那么可以执行： # export HISTTIMEFORMAT='%F %T ' # history | more 1 2008-08-05 19:02:39 service network restart 2 2008-08-05 19:02:39 exit 3 2008-08-05 19:02:39 id 4 2008-08-05 19:02:39 cat /etc/redhat-release 注意 ：这个功能只能用在当 HISTTIMEFORMAT 这个环境变量被设置之后，之后的那些新执行的 bash 命令才会被打上正确的时间戳。在此之前的所有命令，都将会显示成设置 HISTTIMEFORMAT 变量的时间。[感谢 NightOwl 读者补充] 使用 Ctrl+R 搜索历史 Ctrl+R 是我经常使用的一个快捷键。此快捷键让你对命令历史进行搜索，对于想要重复执行某个命令的时候非常有用。当找到命令后，通常再按回车键就可以执行该命令

How to uniformly detect an integer’s sign bit across various encodings (1's complement, 2's complement, sign magnitude)?

由 纵饮孤独 提交于 2019-12-24 04:02:38
问题 How to detect an int sign-ness in C? This question is mostly of historical machines. What I am asking how to distinguish if an integer is 0 or -0. In 1's complement and sign/magnitude int encoding, both a 0 (or +0) and -0 are possible. The simple sign bit test is to compare against 0 . int x; printf("sign bit is %s\n", (x < 0) ? "set" : "not set"); But this fails in 1's complement and sign magnitude when x is -0 . 1st Candidate approach: Mask test. As C defines that an int must have a sign

redirecting to a specific page when clicking browser's back button

由 拟墨画扇 提交于 2019-12-24 03:07:51
问题 it's a bit of a nooby question, but there it goes: i have a site where the user can only navigate from page to page via next and back buttons. i.e there is a wizard the user must follow. part of the wizard includes different pages and part includes the same page but with changing divs (but from user experience its a different page). i would like to simply redirect the user to the first page of the wizard, whenever he clicks on the browser's back button. if possible and simple, i prefer doing

Is it possible to find out when the current syntax of strcpy was added to the C standard?

由 别等时光非礼了梦想. 提交于 2019-12-24 00:58:19
问题 The oldest publicly available C standard seems to be the ISO/IEC 9899:1999, published in 1999. There the strcpy function already has its current syntax. The reason I ask it is that I found a really, really old system where (to my greatest shock) strcpy seems to have almost the same syntax as memcpy . In that implementiation strcpy behaves like this: strcpy(char *destination, char *source, int length) works just like the modern memcpy strcpy(char *destination, char *source) does compile, but

How can I see the entire SCM history in my Xcode project?

由 旧街凉风 提交于 2019-12-23 19:03:13
问题 If I look at the SCM tab in Get Info for my project I only see the commits that affected the project file. Where can I get a list of all the commits for the entire project? 回答1: Xcode 4: go to Organizer (top right), Repositories, choose repository, there it is. 回答2: In Xcode 5 you can choose View > Navigators > Log. From here you can see each of your Updates and Commits in the left pane for actions that have happened since opening the project. For a general history choose Source Control >

In which language did exceptions first appear?

由 空扰寡人 提交于 2019-12-23 12:28:53
问题 I first came across exceptions with ADA 83. As far as I know, the designers of ADA invented the concept of exceptions. Is this true, or did any programming language that came before use exceptions too? 回答1: According to c2.com's Ground Breaking Languages page it was PL/I. 回答2: It depends on how you define generics. Parametric polymorphism - which allows you to define functions and types that are not tied to particular argument / field types - was there in ML already - and that's 1973. There

Unix Subshell inheriting the command history from parent bash

由 一个人想着一个人 提交于 2019-12-23 04:57:26
问题 I have written a series of python tools that spawn new bash sessions. I am want those individual subshells to inherit the command history of the parent. I have tried: shopt -s histappend PROMPT_COMMAND="history -an;$PROMPT_COMMAND" in the .bash_profile . But it didn't give me what I need. I have seen this done. My tool uses: os.system('bash') to spawn a subprocess. Thoughts? better way? 回答1: site.py sets os.environ at startup. This does not change unless you explicitly change os.environ. So,
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