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ManyRelatedManager object is not iterable
...nswers.all(). Adding the parenthesis invokes the all function to return an iterable.
If you include the parenthesis you're saying "give me all the values in the stores answers so long as that value is also in the wish lists answers". Without the parenthesis you're asking for all the values from th...
Rails.env vs RAILS_ENV
... docs, #Rails.env wraps RAILS_ENV:
# File vendor/rails/railties/lib/initializer.rb, line 55
def env
@_env ||= ActiveSupport::StringInquirer.new(RAILS_ENV)
end
But, look at specifically how it's wrapped, using ActiveSupport::StringInquirer:
Wrapping a string in this class ...
Eclipse HotKey: how to switch between tabs?
How can I switch between opened windows in Eclipse? There is Ctrl + F6 , but it's asking me which one I want, but I want switch it like tabs in browser or window in operating system ( Cmd / Win + Tab ) without file-selection from the list. How to do this easy thing in Eclipse?
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Convert DataFrame column type from string to datetime, dd/mm/yyyy format
...asiest way is to use to_datetime:
df['col'] = pd.to_datetime(df['col'])
It also offers a dayfirst argument for European times (but beware this isn't strict).
Here it is in action:
In [11]: pd.to_datetime(pd.Series(['05/23/2005']))
Out[11]:
0 2005-05-23 00:00:00
dtype: datetime64[ns]
You can...
Javascript: get package.json data in gulpfile.js
...ic question per-se, but how would one get info from the package.json file within the gulpfile.js; For instance, I want to get the homepage or the name and use it in a task.
...
Drawable image on a canvas
...
The good way to draw a Drawable on a canvas is not decoding it yourself but leaving it to the system to do so:
Drawable d = getResources().getDrawable(R.drawable.foobar, null);
d.setBounds(left, top, right, bottom);
d.draw(canvas);
This will work with all kinds of drawables, not on...
Search for one value in any column of any table inside a database
Is there a way to search for one value (in my case it is a UID of the type char(64) ) inside any column of any table inside one MS SQL Server database?
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Iteration over std::vector: unsigned vs signed index variable
What is the correct way of iterating over a vector in C++?
17 Answers
17
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How to prepend a string to a column value in MySQL?
...ed a SQL update statement for updating a particular field of all the rows with a string "test" to be added in the front of the existing value.
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How do I view an older version of an SVN file?
...ng some logic and so I need to go back about 40 revisions to the time when it had the logic I need. Other than trying to view a diff of the file in the command line ( very hard to read ), is there any way I could get a copy of that file to review so I can study it to recover parts?
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