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Java regex capturing groups indexes
...group in the pattern start indexing from 1. The indices are defined by the order of the opening parentheses of the capturing groups. As an example, here are all 5 capturing groups in the below pattern:
(group)(?:non-capturing-group)(g(?:ro|u)p( (nested)inside)(another)group)(?=assertion)
| | ...
What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...duce with non-associative operators is considered bad style.
Using higher-order functions is quite pythonic; it makes good use of Python's principle that everything is an object, including functions and classes. You are right that lambdas are frowned upon by some Pythonistas, but mostly because the...
Calculate relative time in C#
...m, while this code may work it is incorrect and invalid to assume that the order of the keys in the Dictionary will be in a specific order. The Dictionary uses the Object.GetHashCode() which does not return a long but an int!. If you want these to be sorted then you should use a SortedList<long, ...
Using Mockito's generic “any()” method
...
This class is now deprecated in order to avoid a name clash with Hamcrest. Use org.mockito.ArgumentMatchers
– leo9r
Mar 22 '19 at 23:26
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What's the difference between deque and list STL containers?
...idates only the iterators that point to the elements that are removed. The ordering of iterators may be changed (that is, list::iterator might have a different predecessor or successor after a list operation than it did before), but the iterators themselves will not be invalidated or made to point t...
What exactly is metaprogramming?
... amusement. We were a tiny startup,
programming as hard as we could in
order to put technical barriers
between us and our competitors.
A suspicious person might begin to
wonder if there was some correlation
here. A big chunk of our code was
doing things that are very hard to do
in...
Getting the count of unique values in a column in bash
...lues in a column for all the files in a folder and sort them in decreasing order of count (highest count first). How would I accomplish this in a Linux command line environment?
...
Why is rbindlist “better” than rbind?
...bind.data.frame will account for the fact that columns may be in different orders, and match up by name), rbindlist doesn't do this kind of checking, and will join by position
eg
do.call(rbind, list(data.frame(a = 1:2, b = 2:3), data.frame(b = 1:2, a = 2:3)))
## a b
## 1 1 2
## 2 2 3
## 3 2 ...
Why aren't Java Collections remove methods generic?
... and HashSet are checking for the hash code, and TreeSet/Map are using the ordering of the elements. Still, they fully implement Collection.remove, without breaking its contract (if the ordering is consistent to equals). And a varied ArrayList (or AbstractCollection, I think) with the equals call tu...
How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
...he grandfather!
BUT you still need to specify the methods to be virtual in order to get the methods correctly overrided...
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