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Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...ults, but we've ascertained that it's at least one-quarter of all inputs.
Now let's look at a fixed-width (i.e. non-bignum) integer power function. For what portion inputs does it not simply overflow? To maximize the number of meaningful input pairs, the base should be signed and the exponent uns...
Fastest Way to Find Distance Between Two Lat/Long Points
...s of Geometry data types in MyISAM table. As of Mysql 5.7.5, InnoDB tables now also support SPATIAL indices.
Create a SPATIAL index on these points
Use MBRContains() to find the values:
SELECT *
FROM table
WHERE MBRContains(LineFromText(CONCAT(
'('
, @lon + 10 / ( 111.1 / cos...
Why does changing 0.1f to 0 slow down performance by 10x?
...
@s73v3r That's a very good question. Now that I look at the assembly, not even + 0.0f gets optimized out. If I had to guess, it could be that + 0.0f would have side-effects if y[i] happened to be a signalling NaN or something... I could be wrong though.
...
How to make good reproducible pandas examples
...=25, freq='D'), 4 ),
'price':(np.random.randn(100).cumsum() + 10) })
Now we have a sample dataset with 100 lines (25 dates per ticker), but we have only used 4 lines to do it, making it easy for everyone else to reproduce without copying and pasting 100 lines of code. You can then display sub...
pytest: assert almost equal
...
py.test now has a feature that does this. I've added an answer discussing it.
– dbn
Nov 3 '16 at 18:36
2
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How can I tell PyCharm what type a parameter is expected to be?
...documentation format for methods and their parameters so that PyCharm can know the type. Recent PyCharm version supports most common doc formats.
For example, PyCharm extracts types from @param style comments.
See also reStructuredText and docstring conventions (PEP 257).
Another option is Python...
How to use UIVisualEffectView to Blur Image?
...the blur to an image? I've been trying to figure out the code for a while now :( still new at obj c!
7 Answers
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What does “program to interfaces, not implementations” mean?
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Interfaces are just contracts or signatures and they don't know
anything about implementations.
Coding against interface means, the client code always holds an Interface object which is supplied by a factory. Any instance returned by the factory would be of type Interface which an...
ActiveModel::ForbiddenAttributesError when creating new user
...pecify in
each controller)
Additionally, load_and_authorize_resource can now take a param_method option to specify a custom method in the controller to run to sanitize input.
You can associate the param_method option with a symbol corresponding to the name of a method that will get called:
class...
Read properties file outside JAR file
...re not absolute path hard code is is required . Both jar and property file now can be copied to any directory and run independently.
– Neil
Jan 9 '12 at 7:50
3
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