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How to join (merge) data frames (inner, outer, left, right)
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By using the merge function and its optional parameters:
Inner join: merge(df1, df2) will work for these examples because R automatically joins the frames by common variable names, but you would most likely want to specify merge(df1, df2, by = "Custome...
Filter element based on .data() key/value
...he record, you can filter on data with jquery (this question is quite old, and jQuery evolved since then, so it's right to write this solution as well):
$('.navlink[data-selected="true"]');
or, better (for performance):
$('.navlink').filter('[data-selected="true"]');
or, if you want to get all...
Path.Combine absolute with relative path strings
...ctory has the trailing \\, otherwise you end up with C:\\blah..\\bling.txt and that doesn't work. In that case you can manually add them to the string or do Path.GetFullPath(Path.Combine(baseDirectory, relativePath))
– Nelson Rothermel
Jun 6 '13 at 21:15
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Bind TextBox on Enter-key press
The default databinding on TextBox is TwoWay and it commits the text to the property only when TextBox lost its focus.
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Why can't we have static method in a (non-static) inner class?
... I know an inner class is associated with an instance of its outer class and I know that it's kinda useless that we become able to declare static members within an inner class but I am still asking why not an inner class can declare static members?
– Kareem
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Django - filtering on foreign key properties
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This has been possible since the queryset-refactor branch landed pre-1.0. Ticket 4088 exposed the problem. This should work:
Asset.objects.filter(
desc__contains=filter,
project__name__contains="Foo").order_by("desc")
The Django Many-to-one documentation has this and oth...
How can I add CGPoint objects to an NSArray the easy way?
I have about 50 CGPoint objects that describe something like a "path", and I want to add them to an NSArray. It's going to be a method that will just return the corresponding CGPoint for an given index. I don't want to create 50 variables like p1 = ...; p2 = ..., and so on. Is there an easy way that...
How do I correctly clean up a Python object?
__del__(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...
Diff two tabs in Vim
Scenario: I have opened Vim and pasted some text. I open a second tab with :tabe and paste some other text in there.
4 An...
Does anyone beside me just NOT get ASP.NET MVC? [closed]
I've been fiddling with ASP.NET MVC since the CTP, and I like a lot of things they did, but there are things I just don't get.
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