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Rsync copy directory contents but not directory itself
...e '-a' then I'll get an error skipping the directory and nothing happens. Reading the man pages, I wouldn't have concluded that. It seems like based on the docs that it should work without the -a option and the -v option is only for verbosity so that isn't relevant to the actual copy working. Wei...
What's the cleanest way of applying map() to a dictionary in Swift?
...ult[key] = transform(val) } return result }. I find it reads better too. Is there a performance issue?
– Marcel
Jul 19 '17 at 13:09
add a comment
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Parcelable where/when is describeContents() used?
...n: FileDescriptor.
This whole Parcelable functionality looks unfinished (read: has bad design). There is one other strange thing in the docs:
Classes implementing the Parcelable interface must also have a static field called CREATOR, which is an object implementing the Parcelable.Creator inter...
from list of integers, get number closest to a given value
...s, like {1: "a", 2: "b"}. This method takes O(n) time.
If the list is already sorted, or you could pay the price of sorting the array once only, use the bisection method illustrated in @Lauritz's answer which only takes O(log n) time (note however checking if a list is already sorted is O(n) and ...
How to get HttpClient to pass credentials along with the request?
... work is because of Windows security disabling the ability to create new threads under an impersonated account (see SO article above.) HttpClient creates new threads via the Task Factory thus causing the error. WebClient on the other hand, runs synchronously on the same thread thereby bypassing th...
pandas three-way joining multiple dataframes on columns
...ething like this:
filenames = ['fn1', 'fn2', 'fn3', 'fn4',....]
dfs = [pd.read_csv(filename, index_col=index_col) for filename in filenames)]
dfs[0].join(dfs[1:])
With @zero's data, you could do this:
df1 = pd.DataFrame(np.array([
['a', 5, 9],
['b', 4, 61],
['c', 24, 9]]),
column...
Way to go from recursion to iteration
... search. But if you change the whole thing into a queue now you are doing breadth-first rather than depth-first traversal.
– pete
Oct 31 '13 at 20:33
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What's the difference between dynamic (C# 4) and var?
I had read a ton of articles about that new keyword that is shipping with C# v4, but I couldn't make out the difference between a "dynamic" and "var".
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Using generic std::function objects with member functions in one class
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@Danh Read the DR carefully. 12 out of 13 overloads were removed by the DR. That last one was not (and won't be; neither in C++11 or C++14).
– Max Truxa
Nov 3 '16 at 16:01
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What is a typedef enum in Objective-C?
... variable another value by casting, though, so you have to be careful when reading enum values.
Finally, kCircle, kRectangle, and kOblateSpheroid are declared as integral constants in the global namespace. Since no specific values were specified, they get assigned to consecutive integers starting ...