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How do I implement interfaces in python?
...= server
def client_show(self):
self._server.show()
# This call will fail with an exception
try:
x = MyClient(MyBadServer)
except Exception as exc:
print 'Failed as it should!'
# This will pass with glory
MyClient(MyServer()).client_show()
...
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
...buffer until the buffer is flushed. Output to a file or terminal is historically slow (terminals or consoles are still slow), writing character by character is ineffective, writing a chunk of bytes is much more effective.
– Some programmer dude
Apr 4 '18 at 17:...
Retargeting solution from .Net 4.0 to 4.5 - how to retarget the NuGet packages?
...d problems with update-package -reinstall <packagename> command, consider running it with -ignoreDependencies flag, like this:
update-package -reinstall <packagename> -ignoreDependencies
This flag will leave your package dependencies alone, otherwise they might got updated even if the...
Best way to make Django's login_required the default
...and imported directly, not as strings.
Also note that this works with any callable view object, including classes.
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What is code coverage and how do YOU measure it?
...cted by using a specialized tool to instrument the binaries to add tracing calls and run a full set of automated tests against the instrumented product. A good tool will give you not only the percentage of the code that is executed, but also will allow you to drill into the data and see exactly whic...
How to read/write from/to file using Go?
...which are convenient wrappers around os.OpenFile. We usually don't need to call OpenFile directly.
Notice treating EOF. Read tries to fill buf on each call, and returns io.EOF as error if it reaches end of file in doing so. In this case buf will still hold data. Consequent calls to Read returns zer...
Implementing INotifyPropertyChanged - does a better way exist?
...ier with C# 5:
protected bool SetField<T>(ref T field, T value,
[CallerMemberName] string propertyName = null)
{...}
which can be called like this:
set { SetField(ref name, value); }
with which the compiler will add the "Name" automatically.
C# 6.0 makes the implementation easier:
prote...
if a ngSrc path resolves to a 404, is there a way to fallback to a default?
...ll have ~18px width
// after this error function has been called
if (w <= 20) { w = 100; }
if (h <= 20) { h = 100; }
var url = 'http://placehold.it/' + w + 'x' + h + '/cccccc/ffffff&text=Oh No!';
element.prop(...
is it possible to change values of the array when doing foreach in javascript?
...
The callback is passed the element, the index, and the array itself.
arr.forEach(function(part, index, theArray) {
theArray[index] = "hello world";
});
edit — as noted in a comment, the .forEach() function can take a secon...
Changing my CALayer's anchorPoint moves the view
...relationship between a CALayer's position and anchorPoint properties. Basically, the position of a layer is specified in terms of the location of the layer's anchorPoint. By default, a layer's anchorPoint is (0.5, 0.5), which lies at the center of the layer. When you set the position of the layer...