大约有 40,000 项符合查询结果(耗时:0.0683秒) [XML]
Unicode equivalents for \w and \b in Java regular expressions?
...erties, too. It now tracks The Unicode Standard, in both RL1.2 and RL1.2a from UTS#18: Unicode Regular Expressions. This is an exciting and dramatic improvement, and the development team is to be commended for this important effort.
Java’s Regex Unicode Problems
The problem with Java regexes ...
List comprehension on a nested list?
...s I would like to keep elements per list to be 10 and vary number of lists from 10-100,000
>>> python -m timeit "[list(map(float,k)) for k in [list(range(0,10))]*10]"
>>> 100000 loops, best of 3: 15.2 usec per loop
>>> python -m timeit "[[float(y) for y in x] for x in ...
Javascript - Track mouse position
...'t available and clientX/Y are,
// calculate pageX/Y - logic taken from jQuery.
// (This is to support old IE)
if (event.pageX == null && event.clientX != null) {
eventDoc = (event.target && event.target.ownerDocument) || document;
doc ...
Is there a way to detach matplotlib plots so that the computation can continue?
...
Use matplotlib's calls that won't block:
Using draw():
from matplotlib.pyplot import plot, draw, show
plot([1,2,3])
draw()
print('continue computation')
# at the end call show to ensure window won't close.
show()
Using interactive mode:
from matplotlib.pyplot import plot, ion, ...
Getting multiple keys of specified value of a generic Dictionary?
It's easy to get the value of a key from a .NET generic Dictionary:
15 Answers
15
...
Python constructors and __init__
...ed called "Constructors"? What is their purpose and how are they different from methods in a class?
5 Answers
...
How do I initialize the base (super) class?
... supports "old-style" and new-style classes. New-style classes are derived from object and are what you are using, and invoke their base class through super(), e.g.
class X(object):
def __init__(self, x):
pass
def doit(self, bar):
pass
class Y(X):
def __init__(self):
super(Y, se...
What's the best way to put a c-struct in an NSArray?
...e don't need a pointer to the values to be stored within. This is distinct from the immutable array wherein the contents are "frozen" at creation and hence values must be passed to the initialisation routine.
– Sedate Alien
Dec 30 '10 at 1:11
...
Why does parseInt(1/0, 19) return 18?
...19)
Within base 19 numbers 0-9 and A-I (or a-i) are a valid numbers. So, from the "Infinity" it takes I of base 19 and converts to base 10 which becomes 18
Then it tries to take the next character i.e. n which is not present in base 19 so discards next characters (as per javascript's behavior of c...
String output: format or concat in C#?
...I'd go with the String.Format option, only because it makes the most sense from an architectural standpoint. I don't care about the performance until it becomes an issue (and if it did, I'd ask myself: Do I need to concatenate a million names at once? Surely they won't all fit on the screen...)
Con...