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Extract elements of list at odd positions
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232
Solution
Yes, you can:
l = L[1::2]
And this is all. The result will contain the elements p...
How to check if one of the following items is in a list?
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283
>>> L1 = [2,3,4]
>>> L2 = [1,2]
>>> [i for i in L1 if i in L2]
[2]
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Using async/await for multiple tasks
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int[] ids = new[] { 1, 2, 3, 4, 5 };
Parallel.ForEach(ids, i => DoSomething(1, i, blogClient).Wait());
Although you run the operations in parallel with the above code, this code blocks each thread that each operation runs on. For example, if t...
What JSON library to use in Scala? [closed]
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222
Unfortunately writing a JSON library is the Scala community's version of coding a todo list ap...
SQL - Rounding off to 2 decimal places
I need to convert minutes to hours, rounded off to 2 decimal places.I also need to display only up to 2 numbers after the decimal point. So if I have minutes as 650.Then hours should be 10.83
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How to merge lists into a list of tuples?
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In Python 2:
>>> list_a = [1, 2, 3, 4]
>>> list_b = [5, 6, 7, 8]
>>> zip(list_a, list_b)
[(1, 5), (2, 6), (3, 7), (4, 8)]
In Python 3:
>>> list_a = [1, 2, 3, 4]
>>> list_b = [5, 6, 7, 8]...
Printing tuple with string formatting in Python
So, i have this problem.
I got tuple (1,2,3) which i should print with string formatting.
eg.
14 Answers
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Add x and y labels to a pandas plot
...ib.axes.AxesSubplot object. You can set the labels on that object.
ax = df2.plot(lw=2, colormap='jet', marker='.', markersize=10, title='Video streaming dropout by category')
ax.set_xlabel("x label")
ax.set_ylabel("y label")
Or, more succinctly: ax.set(xlabel="x label", ylabel="y label").
Alte...
How to use php serialize() and unserialize()
.... But how do you pass this array to Javascript?
Array ( [1] => elem 1 [2] => elem 2 [3] => elem 3 )
The answer is serialization. In case of PHP/Javascript, JSON is actually the better serialization format:
{ 1 : 'elem 1', 2 : 'elem 2', 3 : 'elem 3' }
Javascript can easily reverse thi...
SQL query return data from multiple tables
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472
Part 1 - Joins and Unions
This answer covers:
Part 1
Joining two or more tables using an in...