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Set time part of DateTime in ruby
...Be aware that DateTime.now.midnight does not return 24:00:00 as you might expect, it returns 00:00:00 - the same value as beginning_of_day. See my answer as to why this could be important in some scenarios.
– rmcsharry
Apr 13 '16 at 11:06
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How to compare two colors for similarity/difference
...nd compute deltaE between your two Lab* values. It's not computationally expensive, it's just some nonlinear formulas and some multiplies and adds.
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Retrieving parameters from a URL
...ike the following, how can I parse the value of the query parameters? For example, in this case I want the value of def .
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Quick-and-dirty way to ensure only one instance of a shell script is running at a time
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How to add a new row to an empty numpy array
...; arr
array([], shape=(0, 3), dtype=int64)
Then be sure to append along axis 0:
arr = np.append(arr, np.array([[1,2,3]]), axis=0)
arr = np.append(arr, np.array([[4,5,6]]), axis=0)
But, @jonrsharpe is right. In fact, if you're going to be appending in a loop, it would be much faster to append t...
Why is '+' not understood by Python sets?
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I'm not sure it does; "Because it is blue" does not explain "Why is the sky blue?"
– SingleNegationElimination
Oct 8 '11 at 17:20
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Understanding ibeacon distancing
...tooth-lowenergy/BLE) can work. Is there any true documentation on how far exactly an ibeacon can measure. Lets say I am 300 feet away...is it possible for an ibeacon to detect this?
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How to write a Unit Test?
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Define the expected and desired output for a normal case, with correct input.
Now, implement the test by declaring a class, name it anything (Usually something like TestAddingModule), and add the testAdd method to it (i.e. like the one ...
How can I indent multiple lines in Xcode?
...ll. I come from Eclipse where I always did it that way. How's that done in Xcode? I hope not line by line ;)
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How to download an entire directory and subdirectories using wget?
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Great, so to simplify for the next reader: wget -r -l1 --no-parent http://www.stanford.edu/~boyd/cvxbook/cvxbook_additional_exercises/ was the answer for me. Thanks your answer.
– isomorphismes
Jun 21 '14 at 17:05
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