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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
...l
It is also including a similar sort of way: Array#dig and Hash#dig. So now this
city = params.fetch(:[], :country).try(:[], :state).try(:[], :city)
can be rewritten to
city = params.dig(:country, :state, :city)
Again, #dig is not replicating #try's behaviour. So be careful with returning v...
Android: ProgressDialog.show() crashes with getApplicationContext
... application
window/dialog through a Context that is not an Activity.
Now, i agree, it does not make sense that the method takes a Context param, instead of Activity..
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What do I use for a max-heap implementation in Python?
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But you have to remember to wrap and unwrap your values, which requires knowing if you are dealing with a min- or max-heap.
MinHeap, MaxHeap classes
Adding classes for MinHeap and MaxHeap objects can simplify your code:
class MinHeap(object):
def __init__(self): self.h = []
def heappush(self, ...
How to vertically center a inside a div? [duplicate]
... position the child at top:50% with margin-top:-YYYpx, YYY being half the known height of the child.)
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Insert a row to pandas dataframe
...
A B C
0 NaN NaN NaN
1 5 6 7
2 7 8 9
But now you can easily insert the row as follows. Since the space was preallocated, this is more efficient.
>>> df2.loc[0] = np.array([2, 3, 4])
>>> df2
Out[341]:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
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How to get a Docker container's IP address from the host
... As mentionned by @user3119830, there is a new option to inspect. Now, you can get the Ip easier with docker inspect -format '{{ .NetworkSettings.IPAddress }}' ${CID}
– creack
Jan 7 '14 at 2:48
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How to read a text file into a list or an array with Python
...line='') as csvfile:
spamreader = csv.reader(csvfile, delimiter=',')
Now, you can easily iterate over spamreader like this:
for row in spamreader:
print(', '.join(row))
See documentation for more examples.
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Are NSLayoutConstraints animatable? [duplicate]
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Oh, I see what I was doing wrong now (I was using this pattern before but still with no success)...I was calling setNeedsLayout instead of layoutIfNeeded Surely a DOH moment! Actually just changing a constraint automatically calls setNeedsLayout so I guess ...
Using cURL with a username and password?
...equires a username/password. I'd like to try accessing it with curl. Right now I'm doing something like:
17 Answers
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.htm vs .html ? Which file extension naming is more correct? [closed]
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I guess it's a little too late now however the only time it does make a difference is when you set up HTML signatures on MS Outlook (even 2010). It's just not able to handle .html extensions, only .htm
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