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'Static readonly' vs. 'const'
...d in C# effectively acts like a variable, while a property in C# is a syntax helper for writing a getter method and/or a setter method. This difference is important when other assemblies are involved. If you change a field to a property, and other assemblies depended on this field, then those other ...
Please explain the exec() function and its family
What is the exec() function and its family? Why is this function used and how does its work?
7 Answers
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Scala equivalent of Java java.lang.Class Object
The question is best explained by an example:
2 Answers
2
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Any way to properly pretty-print ordered dictionaries?
...sending it on to the output stream. While the final output produced isn't exceptionalily pretty, it's decent and may be "good enough" to use as a workaround.
Update 2.0
Simplified by using standard library textwrap module, and modified to work in
both Python 2 & 3.
from collections import Ord...
Why does Java's hashCode() in String use 31 as a multiplier?
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Well all primes are odd, except 2. Just sayin.
– Kip
Nov 18 '08 at 20:15
38
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JavaScript “new Array(n)” and “Array.prototype.map” weirdness
I've observed this in Firefox-3.5.7/Firebug-1.5.3 and Firefox-3.6.16/Firebug-1.6.2
14 Answers
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Copy values from one column to another in the same table
...sions where developers have thought like laymen.
– Zaxter
Mar 6 '16 at 11:35
9
Careful if you are...
Who is listening on a given TCP port on Mac OS X?
On Linux, I can use netstat -pntl | grep $PORT or fuser -n tcp $PORT to find out which process (PID) is listening on the specified TCP port. How do I get the same information on Mac OS X?
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What are the mathematical/computational principles behind this game?
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Finite Projective Geometries
The axioms of projective (plane) geometry are slightly different than the Euclidean geometry:
Every two points have exactly one line that passes through them (this is the same).
Every two lines meet in exactly one point (this is...
Python multiprocessing pool.map for multiple arguments
...of Python, you'll need to write a helper function to unpack the arguments explicitly. If you want to use with, you'll also need to write a wrapper to turn Pool into a context manager. (Thanks to muon for pointing this out.)
import multiprocessing
from itertools import product
from contextlib import...