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Python Pandas merge only certain columns
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edited Oct 27 '15 at 7:05
beroe
9,60744 gold badges2828 silver badges6464 bronze badges
answered Jul ...
Using .sort with PyMongo
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207
sort should be a list of key-direction pairs, that is
db.test.find({"number": {"$gt": 1}}).sor...
Pick a random element from an array
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print(array.randomElement()!) // Using ! knowing I have array.count > 0
If you don't create the array and aren't guaranteed count > 0, you should do something like:
if let randomElement = array.randomElement() {
print(randomElement)
}
Swift 4.1 and below
Just to answer your questi...
jQuery .hasClass() vs .is()
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Feb 4 '11 at 18:30
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What does “Splats” mean in the CoffeeScript tutorial?
...t, rest..., last) ->
In the first two cases, if the function receives 0-1 arguments, rest will be an empty array. In the last case, the function needs to receive more than 2 arguments for rest to be non-empty.
Since JavaScript doesn't allow multiple signatures for functions with the same name ...
Why use apparently meaningless do-while and if-else statements in macros?
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#define BAR(X) do { \
int i = f(X); \
if (i > 4) g(i); \
} while (0)
You don't have to use do ... while, you could cook up something with if ... else as well, although when if ... else expands inside of an if ... else it leads to a "dangling else", which could make an existing dangling el...
Nohup is not writing log to output file
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104
It looks like you need to flush stdout periodically (e.g. sys.stdout.flush()). In my testing Py...
Referencing another schema in Mongoose
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edited Aug 1 '13 at 19:04
Gorkem Yurtseven
2,63277 gold badges2626 silver badges4444 bronze badges
an...
Is it possible to read from a InputStream with a timeout?
...vailable()
It is always acceptable for System.in.available() to return 0.
I've found the opposite - it always returns the best value for the number of bytes available. Javadoc for InputStream.available():
Returns an estimate of the number of bytes that can be read (or skipped over)
from thi...
Enums and Constants. Which to use when?
...rom here as I'm lazy)
[FlagsAttribute]
enum DistributedChannel
{
None = 0,
Transacted = 1,
Queued = 2,
Encrypted = 4,
Persisted = 16,
FaultTolerant = Transacted | Queued | Persisted
}
Constants should be for a single value, like PI. There isn't a range of PI values, there is just PI.
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