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Select the values of one property on all objects of an array in PowerShell
...ions; it is a faster - all-in-memory-at-once - alternative to the pipeline-based ForEach-Object cmdlet (%).
Comparing the performance of the various approaches
Here are sample timings for the various approaches, based on an input collection of 10,000 objects, averaged across 10 runs; the absolute...
How to get the Power of some Integer in Swift language?
...tric cryptography."
// using Swift 5.0
func pow<T: BinaryInteger>(_ base: T, _ power: T) -> T {
func expBySq(_ y: T, _ x: T, _ n: T) -> T {
precondition(n >= 0)
if n == 0 {
return y
} else if n == 1 {
return y * x
} else if ...
What is a mixin, and why are they useful?
...m. I can make a plain old request object by saying:
from werkzeug import BaseRequest
class Request(BaseRequest):
pass
If I want to add accept header support, I would make that
from werkzeug import BaseRequest, AcceptMixin
class Request(AcceptMixin, BaseRequest):
pass
If I wanted to ...
Why should I prefer to use member initialization lists?
...
Initialization of base class
One important reason for using constructor initializer list which is not mentioned in answers here is initialization of base class.
As per the order of construction, base class should be constructed before child...
Fixed size queue which automatically dequeues old values upon new enques
... Size = size;
}
public new void Enqueue(T obj)
{
base.Enqueue(obj);
lock (syncObject)
{
while (base.Count > Size)
{
T outObj;
base.TryDequeue(out outObj);
}
}
}
}
...
How to write WinForms code that auto-scales to system font and dpi settings?
...-scale to DPI/font settings well; switch to WPF." However, I think that is based on .NET 1.1; it appears they actually did a pretty good job of implementing auto-scaling in .NET 2.0. At least based on our research and testing so far. However, if some of you out there know better, we'd love to hear f...
Bulk insert with SQLAlchemy ORM
...tly, we can produce an INSERT that is
competitive with using the raw database API directly.
Alternatively, the SQLAlchemy ORM offers the Bulk Operations suite of
methods, which provide hooks into subsections of the unit of work
process in order to emit Core-level INSERT and UPDATE constru...
Create an instance of a class from a string
Is there a way to create an instance of a class based on the fact I know the name of the class at runtime. Basically I would have the name of the class in a string.
...
Abstract methods in Python [duplicate]
...
Before abc was introduced you would see this frequently.
class Base(object):
def go(self):
raise NotImplementedError("Please Implement this method")
class Specialized(Base):
def go(self):
print "Consider me implemented"
...
Differences between Java 8 Date Time API (java.time) and Joda-Time
...lds. A common feature of both field implementation design is that both are based on values of type long (no other types, not even enums).
Enum
JSR-310 offers enums like DayOfWeek or Month while Joda-Time does not offer this because it was mainly developed in years 2002-2004 before Java 5.
Zone AP...