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Git submodule head 'reference is not a tree' error

...ect. Example: $ git submodule update fatal: reference is not a tree: e47c0a16d5909d8cb3db47c81896b8b885ae1556 Unable to checkout 'e47c0a16d5909d8cb3db47c81896b8b885ae1556' in submodule path 'sub' Oops, someone made a super-project commit that refers to an unpublished commit in the submodule sub....
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Binding an enum to a WinForms combo box, and then setting it

... The Enum public enum Status { Active = 0, Canceled = 3 }; Setting the drop down values from it cbStatus.DataSource = Enum.GetValues(typeof(Status)); Getting the enum from the selected item Status status; Enum.TryParse<Status>(cbStatus.SelectedValue.T...
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Vim: Close All Buffers But This One

...his script from vim.org: http://www.vim.org/scripts/script.php?script_id=1071 Just put it to your .vim/plugin directory and then use :BufOnly command to close all buffers but the active one. You could also map it elsewhere you like in your .vimrc. Source on Github (via vim-scripts mirror): https:...
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How to use PyCharm to debug Scrapy projects

I am working on Scrapy 0.20 with Python 2.7. I found PyCharm has a good Python debugger. I want to test my Scrapy spiders using it. Anyone knows how to do that please? ...
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How to combine class and ID in CSS selector?

... | edited May 7 '14 at 20:16 answered Jun 22 '09 at 16:43 ...
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How do I merge two javascript objects together in ES6+?

... 206 You will be able to do a shallow merge/extend/assign in ES6 by using Object.assign: https://de...
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Fragment is not being replaced but put on top of the previous one

... answered Feb 11 '13 at 10:50 Sapan DiwakarSapan Diwakar 8,76144 gold badges2828 silver badges4343 bronze badges ...
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How do you organize your version control repository?

...e to a single local shared "output" directory: %DirOutputRoot%\ProjectA-9.10.11.12.dll, %DirOutputRoot%\ProjectB-13.14.15.16.exe. Make every project build script reference its dependencies via configurable and fully-versioned absolute paths (see above) in the "library" and "output" directories, AND ...
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How to make a python, command-line program autocomplete arbitrary things NOT interpreter

... sneeu 2,12222 gold badges2020 silver badges2727 bronze badges answered Oct 9 '08 at 15:01 ephemientephemient ...
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The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?

...string); result.append(","); } return result.length() > 0 ? result.substring(0, result.length() - 1): ""; share | improve this answer | follow ...