大约有 31,840 项符合查询结果（耗时：0.0247秒） [XML]
How many levels of pointers can we have?
...
276 The implementation shall be able to translate and execute at least one program that contains at least one instance of every one of the following limits: [...]
279 — 12 pointer, array, and function declarators (in any combinations) modifying an
arithmetic, structure, union, or vo...
Resolve promises one after another (i.e. in sequence)?
...2();
})
.then(function() {
console.log(" ---- done ----");
});
}
What about cases with more tasks? Like, 10?
function runSerial(tasks) {
var result = Promise.resolve();
tasks.forEach(task => {
result = result.then(() => task());
});
retu...
Rails find_or_create_by more than one attribute?
...2: Not all of these were factored out of rails just the attribute specific ones.
https://github.com/rails/rails/blob/4-2-stable/guides/source/active_record_querying.md
Example
GroupMember.find_or_create_by_member_id_and_group_id(4, 7)
became
GroupMember.find_or_create_by(member_id: 4, group...
Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...stionable whether floating point is desirable in that arena at all.
Since one of its initial use cases was to code up UNIX, the floating point would have been next to useless. BCPL, on which C was based, also had no use for powers (it didn't have floating point at all, from memory).
As an aside...
Schema for a multilanguage database
...iple tables that each of them have translation like 3 level deep, and each one has 3 fields you need 3*3 9 left joins only for translations.. other wise 3. Also it is easier to add constraints etc and i beleive searching is more resonable.
– GorillaApe
May 1 '1...
How to convert Linux cron jobs to “the Amazon way”?
... that our services can be complex and daunting to both beginners
and seasoned developers alike. We are always happy to offer
architecture and best practice advice.
Best regards,
Ronan G. Amazon Web Services
sh...
How to do parallel programming in Python?
...an do generic work for you. Since we did not pass processes, it will spawn one process for each CPU core on your machine. Each CPU core can execute one process simultaneously.
If you want to map a list to a single function you would do this:
args = [A, B]
results = pool.map(solve1, args)
Don't u...
Among $_REQUEST, $_GET and $_POST which one is the fastest?
...choose $_GET or $_POST -- depending on what my application should do (i.e. one or the other, but not both) : generally speaking :
You should use $_GET when someone is requesting data from your application.
And you should use $_POST when someone is pushing (inserting or updating ; or deleting) data...
Determining if a number is either a multiple of ten or within a particular set of ranges
...
For the first one, to check if a number is a multiple of use:
if (num % 10 == 0) // It's divisible by 10
For the second one:
if(((num - 1) / 10) % 2 == 1 && num <= 100)
But that's rather dense, and you might be better off ...
What is the garbage collector in Java?
... taken care of by the garbage collector, but in other languages such as C, one needs to perform memory management on their own using functions such as malloc and free. Memory management is one of those things which are easy to make mistakes, which can lead to what are called memory leaks -- places w...