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Adding a column to an existing table in a Rails migration
...w migration (rails generate migration add_email_to_users email:string will do the trick).
It will create a migration file containing line:
add_column :users, email, string
Then do a rake db:migrate and it'll run the new migration, creating the new column.
If you have not yet run the original migrat...
How to do multiple arguments to map function where one remains the same in python?
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The docs explicitly suggest this is the main use for itertools.repeat:
Make an iterator that returns object over and over again. Runs indefinitely unless the times argument is specified. Used as argument to map() for invarian...
Do python projects need a MANIFEST.in, and what should be in it?
...hon-distribute.org, but that registration has lapsed) tells me to include doc/txt files and .py files are excluded in MANIFEST.in file
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Git ignore file for Xcode projects
...using the top-voted answer, but it needs a bit of cleanup, so here it is redone for Xcode 4, with some improvements.
I've researched every file in this list, but several of them do not exist in Apple's official Xcode documentation, so I had to go on Apple mailing lists.
Apple continues to add undo...
How to use Boost in Visual Studio 2010
... libraries.
If you are using headers only libraries, then all you need to do is to unarchive the boost download and set up the environment variables. The instruction below set the environment variables for Visual Studio only, and not across the system as a whole. Note you only have to do it once.
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How do I correctly clean up a Python object?
...self) above fails with an AttributeError exception. I understand Python doesn't guarantee the existence of "global variables" (member data in this context?) when __del__() is invoked. If that is the case and this is the reason for the exception, how do I make sure the object destructs properl...
How do I get the value of a textbox using jQuery?
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Why does '.value()' not work in jQuery? I wouldn't have searched Google if it did, because this is what I tried intuitively. Why choose to shorten it two chars...
– Mike de Klerk
Jul 26 '15 ...
How do I POST JSON data with cURL?
...is optional if you use -d, as the -d flag implies a POST request.
On Windows, things are slightly different. See the comment thread.
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Why do we use $rootScope.$broadcast in AngularJS?
...basic information for AngularJS $rootScope.$broadcast , But the AngularJS documentation doesn't help much. In easy words why do we use this?
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How do I set the selected item in a comboBox to match my string using C#?
...string "test1" and my comboBox contains test1 , test2 , and test3 . How do I set the selected item to "test1"? That is, how do I match my string to one of the comboBox items?
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