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Clojure: reduce vs. apply
...ms there is some sort of caching kick in between reduce and apply.
user=> (time (reduce + (range 1e3)))
"Elapsed time: 5.543 msecs"
499500
user=> (time (apply + (range 1e3)))
"Elapsed time: 5.263 msecs"
499500
user=> (time (apply + (range 1e4)))
"Elapsed time: 19.721 msecs"
49995000
user...
How to stop an app on Heroku?
... large migration or need to disable access to your application for some length of time, you can use Heroku’s built in maintenance mode. It will serve a static page to all visitors, while still allowing you to run rake tasks or console commands.
$ heroku maintenance:on
Maintenance mode enabled.
...
Reading CSV files using C#
... use this. Right-click on your project in Visual Studio, then choose Add > Reference, and check the box for Microsoft.VisualBasic.
– Derek Kurth
Jan 2 '15 at 16:00
...
Is it possible to use getters/setters in interface definition?
...Bob";
}
var example = new Example();
alert(example.Name);
And lastly, => is not allowed for class methods - you could start a discussion on Codeplex if you think there is a burning use case for it. Here is an example:
class Test {
// Yes
getName = () => 'Steve';
// No
getN...
How to remove all rows in a numpy.ndarray that contain non-numeric values
...
>>> a = np.array([[1,2,3], [4,5,np.nan], [7,8,9]])
array([[ 1., 2., 3.],
[ 4., 5., nan],
[ 7., 8., 9.]])
>>> a[~np.isnan(a).any(axis=1)]
array([[ 1., 2., 3.],
[ 7., 8., ...
Get a filtered list of files in a directory
...
Another option:
>>> import os, fnmatch
>>> fnmatch.filter(os.listdir('.'), '*.py')
['manage.py']
https://docs.python.org/3/library/fnmatch.html
sh...
Fastest method of screen capturing on Windows
... return;
// get the render target surface.
HRESULT hr = Device->GetRenderTarget(0, &pRenderTarget);
// get the current adapter display mode.
//hr = pDirect3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&d3ddisplaymode);
// create a destination surface.
hr = Device...
Processing Symbol Files in Xcode
...of crash reports after you analyze it, directly in this window.
Devices -> View Device Logs -> All Logs
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Can a variable number of arguments be passed to a function?
...manyArgs(*arg):
print "I was called with", len(arg), "arguments:", arg
>>> manyArgs(1)
I was called with 1 arguments: (1,)
>>> manyArgs(1, 2, 3)
I was called with 3 arguments: (1, 2, 3)
As you can see, Python will unpack the arguments as a single tuple with all the arguments.
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Visual Studio 2013 doesn't discover unit tests
...ministrator in that case.
If your solution is 64 bit, make sure that Test > Test Settings > Default Processor Architecture is set to x64. Sometimes it gets set to x86. Set it to x64, then rebuild.
Sometimes just restarting Visual Studio does the trick because the test explorer will start up ag...