大约有 5,000 项符合查询结果（耗时：0.0213秒） [XML]
How can I access the MySQL command line with XAMPP for Windows?
...tput is suspended. Doesn't use
history file.
-r, --raw Write fields without conversion. Used with --batch.
--reconnect Reconnect if the connection is lost. Disable with
--disable-reconnect. This option is enabled by default.
...
Inline labels in Matplotlib
...atrix
pop = np.zeros((Nlines, N, N), dtype=np.float)
for l in range(Nlines):
# get xy data and scale it to the NxN squares
xy = axis.lines[l].get_xydata()
xy = (xy - [xmin,ymin]) / ([xmax-xmin, ymax-ymin]) * N
xy = xy.astype(np.int32)
# mask stuff...
Stripping everything but alphanumeric chars from a string in Python
...the characters you wish to delete:
delchars = ''.join(c for c in map(chr, range(256)) if not c.isalnum())
(2) Whenever you want to scrunch a string:
scrunched = s.translate(None, delchars)
The setup cost probably compares favourably with re.compile; the marginal cost is way lower:
C:\junk>...
How to read the output from git diff?
...p_fetch(int argc, const char **argv, ... It is in the format @@ from-file-range to-file-range @@ [header]. The from-file-range is in the form -<start line>,<number of lines>, and to-file-range is +<start line>,<number of lines>. Both start-line and number-of-lines refer to...
How to declare an array in Python?
...an list with the first 30 cells already filled.
So
f = []
for i in range(30):
f.append(0)
An example to where this could be used is in Fibonacci sequence.
See problem 2 in Project Euler
share
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...
pyplot scatter plot marker size
...e width of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*4**n for n in range(len(x))]
plt.scatter(x,y,s=s)
plt.show()
gives
Notice how the size increases very quickly. If instead we have
# doubling the area of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*2**n for n in range(len(x))]
p...
How to get a number of random elements from an array?
...gth,
taken = new Array(len);
if (n > len)
throw new RangeError("getRandom: more elements taken than available");
while (n--) {
var x = Math.floor(Math.random() * len);
result[n] = arr[x in taken ? taken[x] : x];
taken[x] = --len in taken ? taken[len...
What does yield mean in PHP?
...icient way to write an Iterator. It allows you to define a function (your xrange) that will calculate and return values while you are looping over it:
foreach (xrange(1, 10) as $key => $value) {
echo "$key => $value", PHP_EOL;
}
This would create the following output:
0 => 1
1 =>...
How to check if a number is between two values?
...greater then 500px and less than 600px, essentially functioning within the range of 500-600px only, correct? (I'm not too good with this stuff lol)
– Dyck
Feb 5 '13 at 23:14
1
...
Is it a bad practice to use break in a for loop? [closed]
...e so part of it will only be executed if the loop doesn't break.
for n in range(5):
for m in range(3):
if m >= n:
print('stop!')
break
print(m, end=' ')
else:
print('finished.')
Output:
stop!
0 stop!
0 1 stop!
0 1 2 finished.
0 1 2 finis...