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Building big, immutable objects without using constructors having long parameter lists
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Well, you want both an easier to read and immutable object once created?
I think a fluent interface CORRECTLY DONE would help you.
It would look like this (purely made up example):
final Foo immutable = FooFactory.create()
.whereRangeConstraintsAre(10...
Omitting the first line from any Linux command output
...it's been deprecated, then removed. You now get tail: cannot open '+2' for reading: No such file or directory (coreutils 8.7). Sad thing is other implementations don't accept -n...
– Mat
Sep 6 '11 at 10:47
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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
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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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