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Why are C# 3.0 object initializer constructor parentheses optional?
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This question was the subject of my blog on September 20th 2010. Josh and Chad's answers ("they add no value so why require them?" and "to eliminate redundancy") are basically correct. To flesh that out a bit more:
The feature of allowing you to elide the argument list as part of the "larger f...
How to get just the parent directory name of a specific file
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Use File's getParentFile() method and String.lastIndexOf() to retrieve just the immediate parent directory.
Mark's comment is a better solution thanlastIndexOf():
file.getParentFile().getName();
These solutions only works if the file has a parent file (e...
Remove file extension from a file name string
...p 9 '11 at 1:22
R. Martinho FernandesR. Martinho Fernandes
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How to make RatingBar to show five stars
I am following the standard example of how to add a RatingBar . To control the number of stars I tried to use android:numStars="5" . The problem is that the number of stars doesn't seem to do anything at all. In portrait-layout I get 6 stars and when I flip the phone I get about 10 stars. I tried ...
Switch statement fallthrough in C#?
...ing and during maintenance.
Now, switch could always have been compiled by converting it into the equivalent chain of if-else blocks or similar, but it was designed as allowing compilation into a particular common assembly pattern where one takes a value, computes an offset from it (whether by looki...
count the frequency that a value occurs in a dataframe column
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Use groupby and count:
In [37]:
df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()
Out[37]:
a
a
a 2
b 3
s 2
[3 rows x 1 columns]
See the online docs: http://pandas.pydata.org/pandas-docs/stable/groupby.html
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Are nested transactions allowed in MySQL?
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@Quassnoi I believe the commands issued to the DB differ, don't they? I might be mistaken
– arod
Sep 3 '12 at 2:03
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Iterating over all the keys of a map
...ned ordering of keys. Furthermore, since Go 1, key order is intentionally randomized between runs to prevent dependency on any perceived order.
– Mark Renouf
Apr 28 '13 at 15:04
6
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How can I remove a substring from a given String?
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Just benchmarked the replacePattern and it's 6x slower than running custom Java code.
– Alex Arvanitidis
Jun 15 '17 at 13:49
add a comme...
How to 'restart' an android application programmatically [duplicate]
...er clicking 'log-out', the application already has 3-4 activities running, and I'm not sure how to step back through them. How do I (simulate?) a restart of the app?
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