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Is D a credible alternative to Java and C++? [closed]
...o support in any modern IDEs (there are plugins for both Visual Studio and Xamarin Studio/MonoDevelop), limited dynamic/shared library support, and few bindings to other languages, D is simply not an option today.
If you like what you see of D, by all means, learn it - it shouldn't take long if you...
How does interfaces with construct signatures work?
...in interfaces are not implementable in classes; they're only for defining existing JS APIs that define a 'new'-able function. Here's an example involving interfaces new signatures that does work:
interface ComesFromString {
name: string;
}
interface StringConstructable {
new(n: string): Co...
pandas GroupBy columns with NaN (missing) values
...Missing Data section of the docs:
NA groups in GroupBy are automatically excluded. This behavior is consistent with R, for example.
One workaround is to use a placeholder before doing the groupby (e.g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fillna(-1...
String formatting: % vs. .format vs. string literal
...on 2.6 introduced the str.format() method with a slightly different syntax from the existing % operator. Which is better and for what situations?
...
GetType() can lie?
...cessfully lied, right?
Well, yes and no... Consider that using this as an exploit would mean using your BadFoo instance as an argument to a method somewhere, that expects likely an object or a common base type for a hierarchy of objects. Something like this:
public void CheckIfInt(object ob)
{
...
How do I achieve the theoretical maximum of 4 FLOPs per cycle?
...ting point operations (double precision) per cycle be achieved on a modern x86-64 Intel CPU?
4 Answers
...
Converting numpy dtypes to native python types
..., how do I automatically convert it to its closest python data type? For example,
12 Answers
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Java code To convert byte to Hexadecimal
...want each byte String of that array to be converted to its corresponding hexadecimal values.
19 Answers
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Total memory used by Python process?
... a useful solution that works for various operating systems, including Linux, Windows 7, etc.:
import os
import psutil
process = psutil.Process(os.getpid())
print(process.memory_info().rss) # in bytes
On my current Python 2.7 install with psutil 5.6.3, the last line should be
print(process.m...
In Django - Model Inheritance - Does it allow you to override a parent model's attribute?
...from it:
class AbstractPlace(models.Model):
name = models.CharField(max_length=20)
rating = models.DecimalField()
class Meta:
abstract = True
class Place(AbstractPlace):
pass
class LongNamedRestaurant(AbstractPlace):
name = models.CharField(max_length=255)
food_ty...