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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...
What regular expression will match valid international phone numbers?
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\+(9[976]\d|8[987530]\d|6[987]\d|5[90]\d|42\d|3[875]\d|
2[98654321]\d|9[8543210]|8[6421]|6[6543210]|5[87654321]|
4[987654310]|3[9643210]|2[70]|7|1)\d{1,14}$
Is the correct format for matching a generic international phone number. I replaced the US land line centric international access c...
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...
Simultaneously merge multiple data.frames in a list
... and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, I could merely rbind , for which plyr's rbind.fill would do the job, but that's not the case with these data.
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How to calculate date difference in JavaScript?
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18 Answers
18
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Convert Go map to json
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112
If you had caught the error, you would have seen this:
jsonString, err := json.Marshal(datas)...
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...
How is OAuth 2 different from OAuth 1?
...simple terms, can someone explain the difference between OAuth 2 and OAuth 1?
10 Answers
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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 ...
When should I use cross apply over inner join?
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13 Answers
13
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