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Generating a PNG with matplotlib when DISPLAY is undefined
...ered Dec 2 '16 at 11:59
Matthias123Matthias123
79266 silver badges1313 bronze badges
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How to get a variable value if variable name is stored as string?
...ariable_value="\$$variable_name"
fi
echo "$variable_value"
}
test=123
get_value_of test
# 123
test="\$(echo \"something nasty\")"
get_value_of test
# $(echo "something nasty")
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impr...
How to properly create an SVN tag from trunk?
...revision of the trunk and "tag" it as well. the command: svn copy -r 123 "svn.example.com/project/trunk" "svn.example.com/project/tags/1.0" -m "Tagging, but using older revision (123)."
– granadaCoder
Oct 18 '11 at 16:39
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Java 理论与实践: 线程池与工作队列 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...您自己的池
Doug Lea 编写了一个优秀的并发实用程序开放源码库 util.concurrent ，它包括互斥、信号量、诸如在并发访问下执行得很好的队列和散列表之类集合类以及几个工作队列实现。该包中的 PooledExecutor 类是一种有效的、广泛...
Is there a way to use shell_exec without waiting for the command to complete?
... Why both nohup and the &?
– bugmenot123
Feb 28 '19 at 10:28
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How to force R to use a specified factor level as reference in a regression?
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See the relevel() function. Here is an example:
set.seed(123)
x <- rnorm(100)
DF <- data.frame(x = x,
y = 4 + (1.5*x) + rnorm(100, sd = 2),
b = gl(5, 20))
head(DF)
str(DF)
m1 <- lm(y ~ x + b, data = DF)
summary(m1)
Now alter the factor ...
How to get a list of installed android applications and pick one to run
...ng with a server. Is there any guidelines?
– dowjones123
Jun 30 '15 at 20:07
1
@dowjones123 Did u...
NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...NASM？
下载地址：http://www.nasm.us/
可以下载源码包或者rpm包，rpm –iUh *.rpm
四、Linux汇编介绍
4.1 DOS和Linux汇编主要不同的地方
DOS汇编中，大部分工作依靠21号中断(int 21h)来完成，并且BIOS服务中断用int 10h和int 1...
Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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ValueError: invalid literal for int() with base 10: ''
...answered Apr 23 '19 at 3:21
Brad123Brad123
49233 silver badges66 bronze badges
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