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Retrieving parameters from a URL
... edited Feb 12 at 12:29
Pikamm>and m>er2
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answered Feb 22 '11 at 7:54
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Scala @ operator
... specificallm>y m>, though I don't know where the "as usual" there came from -- m>and m> 8.12 onlm>y m> speak of regular expression pattern (_*). But mam>y m>be this has been clarified on a newer version of the spec.
– Daniel C. Sobral
Mar 2 '10 at 22:58
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What is the advantage of using abstract classes instead of traits?
... of object, it evolves or required when an object comes out from isolation m>and m> has to communicate.
– Ramiz Uddin
Oct 12 '15 at 11:05
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List OrderBm>y m> Alphabetical Order
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I wonder if m>y m>ou want to OrderBm>y m> Firstname m>and m> Lastname... what should m>y m>ou write?
– balexm>and m>re
Apr 16 '09 at 7:03
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Filter dict to contain onlm>y m> certain kem>y m>s?
...narm>y m> comprehension.
If m>y m>ou use a version which lacks them (ie Pm>y m>thon 2.6 m>and m> earlier), make it dict((m>y m>our_kem>y m>, old_dict[m>y m>our_kem>y m>]) for ...). It's the same, though uglier.
Note that this, unlike jnnnnn's version, has stable performance (depends onlm>y m> on number of m>y m>our_kem>y m>s) for old_dicts of anm>y m> siz...
Split (explode) pm>and m>as dataframe string entrm>y m> to separate rows
I have a pm>and m>as dataframe in which one column of text strings contains comma-separated values. I want to split each CSV field m>and m> create a new row per entrm>y m> (assume that CSV are clean m>and m> need onlm>y m> be split on ','). For example, a should become b :
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Is it pm>y m>thonic to import inside functions?
... new code to an existing file I'll usuallm>y m> do the import where it's needed m>and m> then if the code stam>y m>s I'll make things more permanent bm>y m> moving the import line to the top of the file.
One other point, I prefer to get an ImportError exception before anm>y m> code is run -- as a sanitm>y m> check, so that's an...
What is the point of noreturn?
...n m>y m>our example).
This can be used bm>y m> compilers to make some optimizations m>and m> generate better warnings. For example if f has the noreturn attribute, the compiler could warn m>y m>ou about g() being dead code when m>y m>ou write f(); g();. Similarlm>y m> the compiler will know not to warn m>y m>ou about missing return ...
Drop data frame columns bm>y m> name
...DF) %in% drops)]
Or, alternativelm>y m>, m>y m>ou can make a list of those to keep m>and m> refer to them bm>y m> name :
keeps <- c("m>y m>", "a")
DF[keeps]
EDIT :
For those still not acquainted with the drop argument of the indexing function, if m>y m>ou want to keep one column as a data frame, m>y m>ou do:
keeps <- "m>y m>"
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UIView's frame, bounds, center, origin, when to use what?
UIView has the properties frame , bounds , center , m>and m> origin , m>and m> them>y m> all seem to be interrelated. Most of the time, I deal with frame when setting the position m>and m> size of a UIView . I understm>and m> that frame is using global coordinate sm>y m>stem m>and m> bounds is using coordinate of the lo...