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How to print to stderr in Python?
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import sys
sys.stderr.write()
Is my choice, just more readable and saying exactly what you intend to do and portable across versions.
Edit: being 'pythonic' is a third thought to me over readability and performance... with these two things in mind, with p...
What is the difference between save and export in Docker?
... I already made some images (which was really fun!). Now I want to persist my work and came to the save and export commands, but I don't fully understand them.
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“Parse Error : There is a problem parsing the package” while installing Android application
...ARDemo.apk (make sure to back up the older version) and see if that helps. My guess is that it has something to do with the name of the apk.
If it still does not work, then you can eliminate the name of the apk file as the source of the problem and start investigating 2) by rebuilding your old vers...
Tool to generate JSON schema from JSON data [closed]
We have this json schema draft . I would like to get a sample of my JSON data and generate a skeleton for the JSON schema, that I can rework manually, adding things like description, required, etc, which can not be infered from the specific examples.
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Creating dataframe from a dictionary where entries have different lengths
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Here's a simple way to do that:
In[20]: my_dict = dict( A = np.array([1,2]), B = np.array([1,2,3,4]) )
In[21]: df = pd.DataFrame.from_dict(my_dict, orient='index')
In[22]: df
Out[22]:
0 1 2 3
A 1 2 NaN NaN
B 1 2 3 4
In[23]: df.transpose()
Out[23]: ...
How do I ignore the initial load when watching model changes in AngularJS?
...p graph in the $scope.fieldcontainer property. After I get a response from my REST API (via $resource), I add a watch to 'fieldcontainer'. I am using this watch to detect if the page/entity is "dirty". Right now I'm making the save button bounce but really I want to make the save button invisible un...
Inserting a PDF file in LaTeX
I am trying to insert a PDF or doc file as an appendix in my LaTeX file. Do you know how I can do this?
6 Answers
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How to do ToString for a possibly null object?
...n now have a succinct, cast-free version of the orignal method:
string s = myObj?.ToString() ?? "";
Or even using interpolation:
string s = $"{myObj}";
Original Answer:
string s = (myObj ?? String.Empty).ToString();
or
string s = (myObjc ?? "").ToString()
to be even more concise.
Unfortunately, ...
What is Activity.finish() method doing exactly?
... @Laurent onPause() and onStop() are not always called. See my observation in below answer
– Prakash
Sep 10 '15 at 17:40
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sh...
Python name mangling
... double underscore name in the source and a mangled name in the debugger.
My personal approach is to intentionally avoid it. I work on a very large code base. The rare uses of it stick out like a sore thumb and do not seem justified.
You do need to be aware of it so you know it when you see it.
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