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How to add an extra column to a NumPy array
...And timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstack((a,np.zeros((a.shape[0],1))))
10000 loops, best of 3: 19.6 us per loop
In [27]: %timeit b = np.zeros((a.shape[0],a.shape[1]+1)); b[:,:-1] = a
100000 loops, best of 3: 5.62 us per loop
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How to change the value of ${user} variable used in Eclipse templates
...g - and doing so in Project properties like suggested above may at present time be the only way to do it.
– amn
Oct 9 '12 at 9:23
2
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What’s the best way to check if a file exists in C++? (cross platform)
... network shares: "\\machine\share\this_file_doesnt_exist" => true. Last time I checked was on boost 1.33, use caution...
– rlerallut
Nov 6 '08 at 12:54
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RegEx for Javascript to allow only alphanumeric
...ng
[a-z0-9] a or b or c or ... z or 0 or 1 or ... 9
+ one or more times (change to * to allow empty string)
$ end of string
/i case-insensitive
Update (supporting universal characters)
if you need to this regexp supports universal character you can find list of unicode c...
How do I concatenate multiple C++ strings on one line?
...r_string;
Note that concatenating string literals can be done at compile time. Just remove the +.
str += "Hello World, " "nice to see you, " "or not";
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How to open, read, and write from serial port in C?
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I wrote this a long time ago (from years 1985-1992, with just a few tweaks since then), and just copy and paste the bits needed into each project.
You must call cfmakeraw on a tty obtained from tcgetattr. You cannot zero-out a struct termios, c...
Is there hard evidence of the ROI of unit testing?
Unit testing sounds great to me, but I'm not sure I should spend any time really learning it unless I can convince others that is has significant value. I have to convince the other programmers and, more importantly, the bean-counters in management, that all the extra time spent learning the testin...
Why does changing the sum order returns a different result?
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May extend this later - out of time right now! waiting eagerly for it @Jon
– Prateek
Nov 6 '13 at 19:16
3
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MongoDB mongorestore failure: locale::facet::_S_create_c_locale name not valid
...l, I'm on a fresh Arch install and got the error while trying to run rescuetime. Fixing /etc/locale.gen and running locale-gen was all that was required.
– erb
Jan 15 '16 at 18:21
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insert vs emplace vs operator[] in c++ map
I'm using maps for the first time and I realized that there are many ways to insert an element. You can use emplace() , operator[] or insert() , plus variants like using value_type or make_pair . While there is a lot of information about all of them and questions about particular cases, I sti...