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Pickle incompatibility of numpy arrays between Python 2 and 3
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141
This seems like some sort of incompatibility. It's trying to load a "binstring" object, which ...
Changing UIButton text
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248
When laying out its subviews, a UIButton will set its titleLabel's text value using its own tit...
What is the difference between Python's list methods append and extend?
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append: Appends object at the end.
x = [1, 2, 3]
x.append([4, 5])
print (x)
gives you: [1, 2, 3, [4, 5]]
extend: Extends list by appending elements from the iterable.
x = [1, 2, 3]
x.extend([4, 5])
print (x)
gives you: [1, 2, 3, 4, 5]
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What are the underlying data structures used for Redis?
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edited Sep 4 '13 at 19:39
myusuf3
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Relative frequencies / proportions with dplyr
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mutate(freq = n / sum(n))
# am gear n freq
# 1 0 3 15 0.7894737
# 2 0 4 4 0.2105263
# 3 1 4 8 0.6153846
# 4 1 5 5 0.3846154
From the dplyr vignette:
When you group by multiple variables, each summary peels off one level of the grouping. That makes it easy to prog...
moment.js 24h format
How do I display my time in 24h format instead of 12?
8 Answers
8
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How to merge lists into a list of tuples?
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460
In Python 2:
>>> list_a = [1, 2, 3, 4]
>>> list_b = [5, 6, 7, 8]
>>&g...
C/C++ Struct vs Class
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edited Aug 8 '17 at 14:22
answered May 1 '10 at 14:28
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How to validate IP address in Python? [duplicate]
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Hmm, seems to accept things like "4" and "192.168" and silently pads the rest with zeros. Technically valid, I'm sure, but not quite what I expected.
– krupan
Nov 25 '08 at 23:58
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Rename Pandas DataFrame Index
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243
The rename method takes a dictionary for the index which applies to index values.
You want to r...