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how to concatenate two dictionaries to create a new one in Python? [duplicate]
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Slowest and doesn't work in Python3: concatenate the items and call dict on the resulting list:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9}; d3={10:8,13:22}' \
'd4 = dict(d1.items() + d2.items() + d3.items())'
100000 loops, best of 3: 4.93 usec per loop
Fastest: exploit the dict co...
How do I erase an element from std::vector by index?
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Thank you to all who have answered. What are we to think of a class design when such a simple operation as deleting an element, requires one to come to StackOverflow?
– Pierre
Jan 28 '18 at 18:35
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How to determine the screen width in terms of dp or dip at runtime in Android?
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Why it is necessary to call WindowManager? What about this code? DisplayMetrics displayMetrics = resources.getDisplayMetrics(); float screenWidthDp = displayMetrics.widthPixels / displayMetrics.density;
– Tomáš Hub...
How do I force my .NET application to run as administrator?
Once my program is installed on a client machine, how do I force my program to run as an administrator on Windows 7?
12 An...
How to draw vertical lines on a given plot in matplotlib?
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Calling axvline in a loop, as others have suggested, works, but can be inconvenient because
Each line is a separate plot object, which causes things to be very slow when you have many lines.
When you create the legend each li...
Why do people still use primitive types in Java?
..., meaning this could run on a system where the nearest 1024 are cached and all of them return true... #awkward
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Difference between encoding and encryption
...ion of how text should be transformed into bytes. Similarly, HTTP does not allow all characters to be transmitted safely, so it may be necessary to encode data using base64 (uses only letters, numbers and two safe characters).
When encoding or decoding, the emphasis is placed on everyone having the...
How does the NSAutoreleasePool autorelease pool work?
As I understand it, anything created with an alloc , new , or copy needs to be manually released. For example:
7 Answer...
pandas: filter rows of DataFrame with operator chaining
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That is a really nice solution - I wasn't even aware that you could jury-rig methods like that in python. A function like this would be really nice to have in Pandas itself.
– naught101
Mar 3 '17 at...
Azure SQL Database Bacpac Local Restore
... see any errors and the data seems to be there. Somebody mentions that installing newer version of SQL Server Data Tools helped them (but they are not referring to Management Studio) social.msdn.microsoft.com/Forums/windowsazure/en-US/…
– Juha Palomäki
Oct 2...