大约有 3,516 项符合查询结果（耗时：0.0129秒） [XML]
How do you convert a byte array to a hexadecimal string, and vice versa?
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}
}
return result;
}
static uint[] _Lookup32 = Enumerable.Range(0, 255).Select(i => {
string s = i.ToString("X2");
return ((uint)s[0]) + ((uint)s[1] << 16);
}).ToArray();
static string ByteArrayToHexViaLookupPerByte(byte[] bytes) {
var result = new char[bytes.Le...
Minimizing NExpectation for a custom distribution in Mathematica
...df[x] looks like
Plot[pdf2[3.77, 1.34, -2.65, 0.40, x]*x, {x, 0, .3}, PlotRange -> All]
and the expected value is
NIntegrate[pdf2[3.77, 1.34, -2.65, 0.40, x]*x, {x, 0, \[Infinity]}]
Out= 0.0596504
But since you want the expected value between a start and +inf we need to integrate in this ...
In Python, how do I create a string of n characters in one line of code?
...ii_lowercase
n = 10
string_val = "".join(choice(ascii_lowercase) for i in range(n))
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Regex - Should hyphens be escaped? [duplicate]
Hyphen is a special character in regex, for instance, to select a range, I could do something like:
3 Answers
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How to configure PostgreSQL to accept all incoming connections
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Addition to above great answers, if you want some range of IPs to be authorized, you could edit /var/lib/pgsql/{VERSION}/data file and put something like
host all all 172.0.0.0/8 trust
It will accept incoming connections from any host of ...
Run Cron job every N minutes plus offset
...lanation
An * in the minute field is the same as 0-59/1 where 0-59 is the range and 1 is the step. The command will run at the first minute in the range (0), then at all successive minutes that are distant from the first by step (1), until the last (59).
Which is why */20 * * * * will run at 0 min...
How to convert a string to integer in C?
... num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from atoi:
The call atoi(str) shall be equivalent to:
(int) strtol(str, (char **)NULL, 10)
except that the handling of errors may differ. If the value cannot ...
Plot logarithmic axes with matplotlib in python
...ke:
import pylab
import matplotlib.pyplot as plt
a = [pow(10, i) for i in range(10)]
fig = plt.figure()
ax = fig.add_subplot(2, 1, 1)
line, = ax.plot(a, color='blue', lw=2)
ax.set_yscale('log')
pylab.show()
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Identity increment is jumping in SQL Server database
...24 - 25 December was done another restart and SQL Server reserved the next range 1207306 - 1208305 visible in the entries for the 28th.
Unless you are restarting the service with unusual frequency any "lost" values are unlikely to make any significant dent in the range of values allowed by the data...
What are the dark corners of Vim your mom never told you about? [closed]
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:.! is actually a special case of :{range}!, which filters a range of lines (the current line when the range is .) through a command and replaces those lines with the output. I find :%! useful for filtering whole buffers.
– Nefrubyr
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