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Rails 3 - can't install pg gem
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If you are not sure where your pg_config is, and assuming you are on Linux or Mac, you can run the following command:
which pg_config
Your pg-config can be in different locations depending on how you installed postgres.
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Convert data.frame column to a vector?
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I'm going to attempt to explain this without making any mistakes, but I'm betting this will attract a clarification or two in the comments.
A data frame is a list. When you subset a data frame using the name of a column and [, what you're getting is...
android TextView: setting the background color dynamically doesn't work
Setting the background color programatically of an android TextView doesn't seem to work.
I'm I missing something!
14 Ans...
async await return Task
Can somebody explain what does this means into a synchronous method? If I try to change the method to async then VS complain about it.
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Flatten list of lists [duplicate]
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Please explain why. This is about as simple as it gets
– Paul Seeb
Jun 29 '12 at 15:43
6
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How to run code when a class is subclassed? [duplicate]
...s__ = Watcher
where Watcher is a subclass of type.
In Python3 the syntax has been changed to
class SuperClass(metaclass=Watcher)
Both are equivalent to
Superclass = Watcher(name, bases, clsdict)
where in this case, name equals the string 'Superclass', and bases is the tuple (object, ). The...
Alphabet range in Python
... import string
>>> string.ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
If you really need a list:
>>> list(string.ascii_lowercase)
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
And to do it wi...
How to reset Android Studio
...der - on Windows 7/8 this would be:
[SYSDRIVE]:\Users\[your username] (ex. C:\Users\JohnDoe\)
In this folder there should be a folder called .AndroidStudioBeta or .AndroidStudio (notice the period at the start - so on some OSes it would be hidden).
Delete this folder (or better yet, move it to ...
Return multiple columns from pandas apply()
...ntains the new data, preventing the need to iterate three times. Passing axis=1 to the apply function applies the function sizes to each row of the dataframe, returning a series to add to a new dataframe. This series, s, contains the new values, as well as the original data.
def sizes(s):
s['...
Generating file to download with Django
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Using this example downloads a file that is always empty, any ideas?
– camelCase
May 22 '13 at 23:30
3
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