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What does Docker add to lxc-tools (the userspace LXC tools)?
...extremely fast, memory-cheap and disk-cheap.
This is provided by AUFS, a union filesystem that Docker depends on. You could set up AUFS yourself manually with LXC, but Docker uses it as a standard.
5) Logging: the standard streams (stdout/stderr/stdin) of each process container is collected an...
How can I combine hashes in Perl?
...y ...)
See also
PM post on merging hashes
PM Categorical Q&A hash union
Perl Cookbook 5.10. Merging Hashes
websearch://perlfaq "merge two hashes"
websearch://perl merge hash
https://metacpan.org/pod/Hash::Merge
Footnotes
1 * (aka associative-array, aka dictionary)
...
Concurrent HashSet in .NET Framework?
...cky part about making an ISet<T> concurrent is that the set methods (union, intersection, difference) are iterative in nature. At the very least you have to iterate over all n members of one of the sets involved in the operation, while locking both sets.
You lose the advantages of a Concur...
How can I pair socks from a pile efficiently?
...ll (because they have thread-local piles). At the end, all workers need to union their pile-sets. I believe that can be done in O(log (worker count * piles per worker)) if the workers form an aggregation tree.
What about the element distinctness problem? As the article states, the element distinct...
Resolving ambiguous overload on function pointer and std::function for a lambda using +
...da]/3
The type of the lambda-expression [...] is a unique, unnamed non-union class type — called the closure type — whose properties are described below.
[expr.prim.lambda]/6
The closure type for a lambda-expression with no lambda-capture has a public non-virtual non-explicit const con...
How can I view the source code for a function?
...tialPolygons
Functions that call unexported functions
In the case of ts.union, .cbindts and .makeNamesTs are unexported functions from the stats namespace. You can view the source code of unexported functions by using the ::: operator or getAnywhere.
> stats:::.makeNamesTs
function (...)
{
...
How to create a MySQL hierarchical recursive query
... parent_id
from products
where parent_id = 19
union all
select p.id,
p.name,
p.parent_id
from products p
inner join cte
on p.parent_id = cte.id
)
select * from cte;
The value specified in parent_id = 19 should be set ...
How to use QueryPerformanceCounter?
...HighPart and a LowPart. If the system does support 64 bit ints then it's a union between the 2 32 bit ints and a 64 bit int called the QuadPart.
– Ramónster
Nov 15 '09 at 23:28
8
...
MongoDB with redis
...).
Redis provides a convenient set datatype and its associated operations (union, intersection, difference on multiple sets, etc ...). It is quite easy to implement a basic faceted search or tagging engine on top of this feature, which is an interesting addition to MongoDB more traditional indexing ...
How is Docker different from a virtual machine?
...e host, see superuser.com/questions/889472/…. However, to illustrate the union filesystem of the containers, there could be a shared layer of libs/bins directly above the docker engine.
– Betamos
Dec 5 '15 at 1:33
...