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Returning the product of a list
... numexpr as ne
# from functools import reduce # python3 compatibility
a = range(1, 101)
%timeit reduce(lambda x, y: x * y, a) # (1)
%timeit reduce(mul, a) # (2)
%timeit np.prod(a) # (3)
%timeit ne.evaluate("prod(a)") # (4)
In the following configur...
How do I wrap link_to around some html ruby code?
... and didn't find a good answer. The following should work:
<% link_to raw(html here), @album %>
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How to save all the variables in the current python session?
...ave the following error: PicklingError: Can't pickle <built-in function raw_input>: it's not the same object as __builtin__.raw_input I just have 2 variables declared in my workspace. Any ideas on how to solve this? Has some better way to save the current session come out after this answer?
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Is it better to use std::memcpy() or std::copy() in terms to performance?
...ke this work by first working on the unaligned portion at the start of the range, then the aligned portion, then the unaligned portion at the end. If it is all guaranteed to be aligned, then the code becomes simpler and faster, and easier for the branch predictor in your processor to get correct.
P...
Java equivalent of C#'s verbatim strings with @
...Java but could be available in future releases.
There was created JEP 326: Raw String Literals at 2018/01/23
See the progress at https://bugs.openjdk.java.net/browse/JDK-8196004
Probably some day you will be able to do it with:
`c:\afolder\afile`
UPDATE: JEP proposed to drop from JDK 12:326: Ra...
Java's L number (long) specification
...teger, which is why when you type in (long) 6000000000 (not in integer's range) it will complain that 6000000000 is not an integer. To correct this, I had to specify 6000000000L . I just learned about this specification.
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What's the difference between eval, exec, and compile?
... anything else beyond a single expression:
>>> compile('for i in range(3): print(i)', '<string>', 'eval')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<string>", line 1
for i in range(3): print(i)
^
SyntaxError: invalid ...
Shuffling a list of objects
...where the objects are lists:
from random import shuffle
x = [[i] for i in range(10)]
shuffle(x)
# print(x) gives [[9], [2], [7], [0], [4], [5], [3], [1], [8], [6]]
# of course your results will vary
Note that shuffle works in place, and returns None.
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Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
I'm using NLTK to perform kmeans clustering on my text file in which each line is considered as a document. So for example, my text file is something like this:
...