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为维护国家安全 中国限制出口无人机和高性能计算机 - 资讯 - 清泛网 - 专注...
...展，当然同时也刺激了国产自主计算技术的突破。
7月31日，中国商务部、海关总署发布联合公告，为维护国家安全，自8月15日起，对部分无人驾驶航空飞行器和高性能计算机实施出口管制。
无人驾驶航空飞行器和无人驾驶飞...
汇编语言（王爽著）附书签 - 文档下载 - 清泛网 - 专注C/C++及内核技术
...的命令。
这是一本入门的汇编语言教材
关于内容：1、内容真的是做到了深入浅出（书是给人看的，别人看懂了才是最关键的）。2、有的地方看的出来是老师自己的感悟（不像其它国内大多数的书，就知道东抄一点西搬一点...
What is the best way to get all the divisors of a number?
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16 Answers
16
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How to trace the path in a Breadth-First Search?
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197
+50
You sho...
Split column at delimiter in data frame [duplicate]
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105
@Taesung Shin is right, but then just some more magic to make it into a data.frame.
I added a ...
How to get different colored lines for different plots in a single figure?
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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)
pl...
Common programming mistakes for Clojure developers to avoid [closed]
... any base between 2 and 36 by using the "base+r+value" notation, such as 2r101010 or 36r16 which are 42 base ten.
Trying to return literals in an anonymous function literal
This works:
user> (defn foo [key val]
{key val})
#'user/foo
user> (foo :a 1)
{:a 1}
so I believed this would a...
Extract a substring according to a pattern
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Here are a few ways:
1) sub
sub(".*:", "", string)
## [1] "E001" "E002" "E003"
2) strsplit
sapply(strsplit(string, ":"), "[", 2)
## [1] "E001" "E002" "E003"
3) read.table
read.table(text = string, sep = ":", as.is = TRUE)$V2
## [1] "E001" "E002...
Sorting multiple keys with Unix sort
I have potentially large files that need to be sorted by 1-n keys. Some of these keys might be numeric and some of them might not be. This is a fixed-width columnar file so there are no delimiters.
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Excel: last character/string match in a string
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12 Answers
12
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