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PostgreSQL - max number of parameters in “IN” clause?
...esql jdbc driver:
Caused by: java.io.IOException: Tried to send an out-of-range integer as a 2-byte value: 100000
at org.postgresql.core.PGStream.SendInteger2(PGStream.java:201)
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Sorting an IList in C#
...unt, comparer);
}
else
{
List<T> range = new List<T>(count);
for (int i = 0; i < count; i++)
{
range.Add(list[index + i]);
}
range.Sort(comparer);
Copy(range, 0, list, index...
How to get the changes on a branch in Git
...id. Note that the git-rev-parse manpage describes A...B in the "Specifying Ranges" section, and everything in that section is only valid in situations where a revision range is valid (i.e. when a revision list is desired).
To get a log containing just x, y, and z, try git log HEAD..branch (two dots...
How to empty a list?
... is slightly slower than l[:] = [] by 1.1 usec.
$ python -mtimeit "l=list(range(1000))" "b=l[:];del b[:]"
10000 loops, best of 3: 29.8 usec per loop
$ python -mtimeit "l=list(range(1000))" "b=l[:];b[:] = []"
10000 loops, best of 3: 28.7 usec per loop
$ python -V
Python 2.5.2
...
pythonic way to do something N times without an index variable?
...
A slightly faster approach than looping on xrange(N) is:
import itertools
for _ in itertools.repeat(None, N):
do_something()
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...
Is it possible to capture a Ctrl+C signal and run a cleanup function, in a “defer” fashion?
...han os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func(){
for sig := range c {
// sig is a ^C, handle it
}
}()
The manner in which you cause your program to terminate and print information is entirely up to you.
...
Getting the IP address of the current machine using Java
...l Network Interfaces, but how do i distinguish them?
Any address in the range 127.xxx.xxx.xxx is a "loopback" address. It is only visible to "this" host.
Any address in the range 192.168.xxx.xxx is a private (aka site local) IP address. These are reserved for use within an organization. The sa...
Which Boost features overlap with C++11?
...
Replaceable by C++11 language features or libraries
Foreach → range-based for
Functional/Forward → Perfect forwarding (with rvalue references, variadic templates and std::forward)
In Place Factory, Typed In Place Factory → Perfect forwarding (at least for the documented use cases)
L...
Getting the index of the returned max or min item using max()/min() on a list
...mgetter() presented in the other answers, and use instead
index_min = min(range(len(values)), key=values.__getitem__)
because it doesn't require to import operator nor to use enumerate, and it is always faster(benchmark below) than a solution using itemgetter().
If you are dealing with numpy arr...
Iterator invalidation rules
...y consecutive group of equal elements referred to by the iterator i in the range [first + 1, last) for which *i == *(i-1) (for the version of unique with no arguments) or pred(*i, *(i - 1)) (for the version of unique with a predicate argument) holds. Invalidates only the iterators and references to ...