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How to get the original value of an attribute in Rails
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Before rails 5.1
Appending _was to your attribute will give you the previous value.
For rail...
Undo a Git merge that hasn't been pushed yet
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32 Answers
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How I can delete in VIM all text from current line to end of file?
...head hugefile > firstlines
(If you are on Windows you can use the Win32 port of head)
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A CORS POST request works from plain JavaScript, but why not with jQuery?
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UPDATE: As TimK pointed out, this isn't needed with jquery 1.5.2 any more. But if you want to add custom headers or allow the use of credentials (username, password, or cookies, etc), read on.
I think I found the answer! (4 hours and a lot of cursing later)
//This does not work!!
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How to get list of all installed packages along with version in composer?
I have been working on a project using Symfony 2.1 on my local machine. I have uploaded it to my server but when I try and install the vendor bundles using Composer, I'm getting a lot of dependency errors. Presumably this is something to do with the latest version of Symfony just being released an...
How do I find all files containing specific text on Linux?
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How to convert Linux cron jobs to “the Amazon way”?
...hole LAMP web application from dedicated machines to the cloud (Amazon EC2 machines). It's going great so far but the way we do crons is sub-optimal. I have a Amazon-specific question about how to best manage cron jobs in the cloud using "the Amazon way".
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How to force a Solution file (SLN) to be opened in Visual Studio 2013?
Trying to open a VS 2012 solution (SLN file) explicitly in VS 2013 succeeds. Simply double-clicking it in Windows Explorer still opens it in VS 2012 instead.
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Python coding standards/best practices [closed]
...you prefer?"
As mentioned by you follow PEP 8 for the main text, and PEP 257 for docstring conventions
Along with Python Style Guides, I suggest that you refer the following:
Code Like a Pythonista: Idiomatic Python
Common mistakes and Warts
How not to write Python code
Python gotcha
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