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How exactly does a generator comprehension work?
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Do you understand list comprehensions? If so, a generator expression is like a list comprehension, but instead of finding all the items you're interested and packing them into list, it waits, and yields each item out of the expression, one by one.
>>> my_list = [1, 3, 5, 9,...
Detect encoding and make everything UTF-8
I'm reading out lots of texts from various RSS feeds and inserting them into my database.
24 Answers
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Most underused data visualization [closed]
...(quote, as.is=TRUE)
stock.data <- transform(stock.data,
week = as.POSIXlt(Date)$yday %/% 7 + 1,
wday = as.POSIXlt(Date)$wday,
year = as.POSIXlt(Date)$year + 1900)
library(ggplot2)
ggplot(stock.data, aes(week, wday, fill = Adj.Close)) +
geom_tile(colour = "white") +
scale_fill_gradien...
Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
I am making some matrix multiplication benchmarking, as previously mentioned in
Why is MATLAB so fast in matrix multiplication?
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Setting variable to NULL after free
...le that says, after freeing any memory, reset the variable to NULL . For example ...
23 Answers
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What does “hashable” mean in Python?
... if it has hash value now what is hash value. can you give some example
– user1755071
Jan 26 '13 at 9:56
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Counting the occurrences / frequency of array elements
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How can I uninstall an application using PowerShell?
... Add or Remove Programs ' functionality using PowerShell to uninstall an existing application ? Or to check if the application is installed?
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Why are hexadecimal numbers prefixed with 0x?
Why are hexadecimal numbers prefixed as 0x ?
I understand the usage of the prefix but I don't understand the significance of why 0x was chosen.
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