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How can I detect if the user is on localhost in PHP?
...ient requesting is given by the web server.
$whitelist = array(
'127.0.0.1',
'::1'
);
if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
// not valid
}
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How to get different colored lines for different plots in a single figure?
...
E.g.:
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(10)
plt.plot(x, x)
plt.plot(x, 2 * x)
plt.plot(x, 3 * x)
plt.plot(x, 4 * x)
plt.show()
And, as you may already know, you can easily add a legend:
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(10)
plt...
Replace all elements of Python NumPy Array that are greater than some value
...o replace all values in it greater than or equal to a threshold T with 255.0. To my knowledge, the most fundamental way would be:
...
Is there a printf converter to print in binary format?
...Y_PATTERN "%c%c%c%c%c%c%c%c"
#define BYTE_TO_BINARY(byte) \
(byte & 0x80 ? '1' : '0'), \
(byte & 0x40 ? '1' : '0'), \
(byte & 0x20 ? '1' : '0'), \
(byte & 0x10 ? '1' : '0'), \
(byte & 0x08 ? '1' : '0'), \
(byte & 0x04 ? '1' : '0'), \
(byte & 0x02 ? '1' : '0...
Question mark and colon in JavaScript
...f the ? as "then" and : as "else".
Your code is equivalent to
if (max != 0)
hsb.s = 255 * delta / max;
else
hsb.s = 0;
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Adding an arbitrary line to a matplotlib plot in ipython notebook
...as np
import matplotlib.pyplot as plt
np.random.seed(5)
x = np.arange(1, 101)
y = 20 + 3 * x + np.random.normal(0, 60, 100)
plt.plot(x, y, "o")
# draw vertical line from (70,100) to (70, 250)
plt.plot([70, 70], [100, 250], 'k-', lw=2)
# draw diagonal line from (70, 90) to (90, 200)
plt.plot([70,...
Regex that accepts only numbers (0-9) and NO characters [duplicate]
I need a regex that will accept only digits from 0-9 and nothing else. No letters, no characters.
1 Answer
...
Duplicate files copied (Android Studio 0.4.0) [duplicate]
...ttpcore and httpmime libraries from Apache. After update Android Studio to 0.4.0 I have this issue building my project:
2 A...
截图软件截图区域以外背景变灰的实现--AlphaBlend - C/C++ - 清泛网 - 专注...
...
// ------------画黑色背景----------------
COLORREF bgColor = RGB(0, 0, 0);
char alpha = (255 * 30) / 100;
int screenX = GetSystemMetrics(SM_CXSCREEN);
int screenY = GetSystemMetrics(SM_CYSCREEN);
CDC memdc;
memdc.CreateCompatibleDC(&dc);
CBitmap bmp, *pOldBitmap;
bmp.CreateCompati...
Catching error codes in a shell pipe
...
20
If you really don't want the second command to proceed until the first is known to be successful...