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Elements order in a “for (… in …)” loop
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216
Quoting John Resig:
Currently all major browsers loop over the properties of an object in the...
Install a module using pip for specific python version
On Ubuntu 10.04 by default Python 2.6 is installed, then I have installed Python 2.7. How can I use pip install to install packages for Python 2.7.
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How to convert list of key-value tuples into dictionary?
...zip it. ValueError: dictionary update sequence element #0 has length 1916; 2 is required
THAT is your actual question.
The answer is that the elements of your list are not what you think they are. If you type myList[0] you will find that the first element of your list is not a two-tuple, e.g. ('A...
Convert command line arguments into an array in Bash
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216
Actually your command line arguments are practically like an array already. At least, you can ...
Scrolling a flexbox with overflowing content
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273
I've spoken to Tab Atkins (author of the flexbox spec) about this, and this is what we came up...
Numpy: Get random set of rows from 2D array
I have a very large 2D array which looks something like this:
7 Answers
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Minimizing NExpectation for a custom distribution in Mathematica
...ur definition above into simple functions:
pdf[a_, b_, m_, s_, x_] := (1/(2*(a + b)))*a*b*
(E^(a*(m + (a*s^2)/2 - x))*Erfc[(m + a*s^2 - x)/(Sqrt[2]*s)] +
E^(b*(-m + (b*s^2)/2 + x))*Erfc[(-m + b*s^2 + x)/(Sqrt[2]*s)])
pdf2[a_, b_, m_, s_, x_] := pdf[a, b, m, s, Log[x]]/x;
If we plot pdf2 ...
Filter dict to contain only certain keys?
...ctionary comprehension.
If you use a version which lacks them (ie Python 2.6 and earlier), make it dict((your_key, old_dict[your_key]) for ...). It's the same, though uglier.
Note that this, unlike jnnnnn's version, has stable performance (depends only on number of your_keys) for old_dicts of any...
How to initialize a vector in C++ [duplicate]
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2 Answers
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A fast method to round a double to a 32-bit int explained
... source code, I noticed that Lua uses a macro to round a double to a 32-bit int . I extracted the macro , and it looks like this:
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