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How do I get a raw, compiled SQL query from a SQLAlchemy expression?
...s waiting to be bound by the statement compiler or MySQLdb dialect engine, etc).
12 Answers
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Simple and fast method to compare images for similarity
...hreshold. It is also very sensitive to color changes (brightness, contrast etc.). You can combine it with the previous two.
Detectors of salient points/areas - such as MSER (Maximally Stable Extremal Regions), SURF or SIFT. These are very robust algorithms and they might be too complicated for your ...
What is the best way to programmatically detect porn images? [closed]
...a social networking site which allows users to upload their pics, avatars, etc?
25 Answers
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Is it possible to define more than one function per file in MATLAB, and access them from outside tha
...ramming. You'd access the function as myClass.static1(), myClass.static2() etc.
OOP functionality is only officially supported since R2008a, so unless you want to use the old, undocumented OOP syntax, the answer for you is no, as explained by @gnovice.
EDIT
One more way to define multiple funct...
Break or return from Java 8 stream forEach?
...stream must not be null but suddenly and unexpectedly one of them is null) etc.
According to the documentation for Iterable.forEach():
Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception... Exceptions thrown by the ...
Format LocalDateTime with Timezone in Java8
...a debate initiated by Bank Credit Suisse suggesting the name PlainDateTime etc. Probably better because the prefix "plain" does indicate that there is nothing more than just date-time. If we were still before Java v1.0 then no prefix would have been better, but names like Date etc. are already reser...
How to assign from a function which returns more than one value?
...the function you would have
x = desired_return_value_1 # (vector, matrix, etc)
y = desired_return_value_2 # (vector, matrix, etc)
returnlist = list(x,y...)
} # end of function
main program
x = returnlist[[1]]
y = returnlist[[2]]
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Side-by-side plots with ggplot2
...rint the side effect to a file, specify a device driver (such as pdf, png, etc), e.g.
pdf("foo.pdf")
grid.arrange(plot1, plot2)
dev.off()
or, use arrangeGrob() in combination with ggsave(),
ggsave("foo.pdf", arrangeGrob(plot1, plot2))
This is the equivalent of making two distinct plots using p...
How Do I Choose Between a Hash Table and a Trie (Prefix Tree)?
...ickly look up prefixes of keys, enumerate all entries with a given prefix, etc.
Advantages of linked structure:
If there are many common prefixes, the space they require is shared.
Immutable tries can share structure. Instead of updating a trie in place, you can build a new one that's different ...
Is there an S3 policy for limiting access to only see/access one bucket?
...ks like images.mysite.com on my S3 and other buckets containing backups, etc.
23 Answers
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