大约有 40,000 项符合查询结果（耗时：0.0938秒） [XML]
getMinutes() 0-9 - How to display two digit numbers?
...
20 Answers
20
Active
...
How to run cron job every 2 hours
...
Just do:
0 */2 * * * /home/username/test.sh
The 0 at the beginning means to run at the 0th minute. (If it were an *, the script would run every minute during every second hour.)
Don't forget, you can check syslog to see if it eve...
How to list the size of each file and directory and sort by descending size in Bash?
...
answered Feb 7 '13 at 10:54
DeveloperDeveloper
20.6k1919 gold badges7272 silver badges114114 bronze badges
...
Apply a function to every row of a matrix or a data frame
... 3 4
[3,] 5 6
R> apply(M, 1, function(x) 2*x[1]+x[2])
[1] 4 10 16
R>
This takes a matrix and applies a (silly) function to each row. You pass extra arguments to the function as fourth, fifth, ... arguments to apply().
...
What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?
... format: major.minor. This would result in:
[assembly: AssemblyVersion("1.0")]
If you're following SemVer strictly then this means you only update when the major changes, so 1.0, 2.0, 3.0, etc.
AssemblyFileVersion
Used for deployment. You can increase this number for every deployment. It is use...
Delete topic in Kafka 0.8.1.1
I need to delete the topic test in Apache Kafka 0.8.1.1.
14 Answers
14
...
SSH library for Java [closed]
...
answered Jun 15 '09 at 14:27
David RabinowitzDavid Rabinowitz
27.2k1313 gold badges8585 silver badges123123 bronze badges
...
How to catch integer(0)?
Let's say we have a statement that produces integer(0) , e.g.
6 Answers
6
...
How can I remove the decimal part from JavaScript number?
...
403
You could use...
Math.trunc() (truncate fractional part, also see below)
Math.floor() (round ...
Plot yerr/xerr as shaded region rather than error bars
...
from matplotlib import pyplot as plt
import numpy as np
x = np.linspace(0, 30, 30)
y = np.sin(x/6*np.pi)
error = np.random.normal(0.1, 0.02, size=y.shape)
y += np.random.normal(0, 0.1, size=y.shape)
plt.plot(x, y, 'k-')
plt.fill_between(x, y-error, y+error)
plt.show()
See also the matplotlib...