大约有 3,517 项符合查询结果（耗时：0.0174秒） [XML]
What characters are forbidden in Windows and Linux directory names?
...klist of characters, you could use a whitelist. All things considered, the range of characters that make sense in a file or directory name context is quite short, and unless you have some very specific naming requirements your users will not hold it against your application if they cannot use the wh...
Getting individual colors from a color map in matplotlib
...0.99923106502084169, 0.74602077638401709, 1.0)
For values outside of the range [0.0, 1.0] it will return the under and over colour (respectively). This, by default, is the minimum and maximum colour within the range (so 0.0 and 1.0). This default can be changed with cmap.set_under() and cmap.set_o...
What's the hardest or most misunderstood aspect of LINQ? [closed]
...g to do a join without the join operator will result in O(n^x): from i1 in range1 from i2 in range2 from i3 in range3 from i4 in range4 where i1 == i2 && i3 == i4 select new { i1, i2, i3, i4}. And I've actually seen this written before. It works, but very slowly.
– Mark...
Pick a random element from an array
...nt expect: Int, Double, Float, UInt32, etc. And it lets you provide target ranges for the values. Very handy. You can use array[Int.random(0..<array.count)]` in Swift 4.2
– Duncan C
Sep 19 '18 at 18:30
...
Plot two graphs in same plot in R
...add another graph of x2 and y2 in the same graph. Both x1 and x2 have same range but different values.
– Kavipriya
Oct 21 '15 at 4:35
1
...
MYSQL OR vs IN performance
...iginal test, as it was 6 years ago, though it returns a result in the same range as this test)
In request for some sample code to test this, here is the simplest possible use case. Using Eloquent for syntax simplicity, raw SQL equivalent executes the same.
$t = microtime(true);
for($i=0; $i<10...
Text Progress Bar in the Console [closed]
...
print()
Sample Usage
import time
# A List of Items
items = list(range(0, 57))
l = len(items)
# Initial call to print 0% progress
printProgressBar(0, l, prefix = 'Progress:', suffix = 'Complete', length = 50)
for i, item in enumerate(items):
# Do stuff...
time.sleep(0.1)
# Upd...
Date ticks and rotation in matplotlib
...t
now = dt.datetime.now()
hours = [now + dt.timedelta(minutes=x) for x in range(0,24*60,10)]
days = [now + dt.timedelta(days=x) for x in np.arange(0,30,1/4.)]
hours_value = np.random.random(len(hours))
days_value = np.random.random(len(days))
fig, axs = plt.subplots(2)
fig.subplots_adjust(hspace=0...
Python time measure function
...Timer
@Timer(average=False)
def matmul(a,b, times=100):
for i in range(times):
np.dot(a,b)
Output:
matmul:0.368434
matmul:2.839355
It can also work like a plug-in timer with namespace control(helpful if you are inserting it to a function which has a lot of codes and ma...
What are the differences between the threading and multiprocessing modules?
...t, niters):
'''
A useless CPU bound function.
'''
for i in range(niters):
result = (result * result * i + 2 * result * i * i + 3) % 10000000
return result
class CpuThread(threading.Thread):
def __init__(self, niters):
super().__init__()
self.niters = ...