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Regular expression that matches valid IPv6 addresses
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30 Answers
30
Active
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xkcd style graphs in MATLAB
...t a transformation.
%# define plot data
x = 1:0.1:10;
y1 = sin(x).*exp(-x/3) + 3;
y2 = 3*exp(-(x-7).^2/2) + 1;
%# plot
fh = figure('color','w');
hold on
plot(x,y1,'b','lineWidth',3);
plot(x,y2,'w','lineWidth',7);
plot(x,y2,'r','lineWidth',3);
xlim([0.95 10])
ylim([0 5])
set(gca,'fontName','Comic ...
What's the difference between tilde(~) and caret(^) in package.json?
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4053
See the NPM docs and semver docs:
~version “Approximately equivalent to version”, will upda...
Why are these numbers not equal?
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359
General (language agnostic) reason
Since not all numbers can be represented exactly in IEEE f...
How to test valid UUID/GUID?
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439
Currently, UUID's are as specified in RFC4122. An often neglected edge case is the NIL UUID, no...
Difference between numpy.array shape (R, 1) and (R,)
...ers:
>>> a = numpy.arange(12)
>>> a
array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])
Then a consists of a data buffer, arranged something like this:
┌────┬────┬────┬────┬────┬────┬────┬────...
Validating IPv4 addresses with regexp
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36 Answers
36
Active
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Regular expression for matching HH:MM time format
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375
Your original regular expression has flaws: it wouldn't match 04:00 for example.
This may wor...
LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...如下的LP问题：
在模型窗口中输入如下代码：
min=2*x1+3*x2;
x1+x2>=350;
x1>=100;
2*x1+x2<=600;
然后点击工具条上的按钮 即可。
例1.2 使用LINGO软件计算6个发点8个收点的最小费用运输问题。产销单位运价如下表。
销地
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