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Get the time difference between two datetimes
I know I can do anything and some more envolving Dates with momentjs. But embarrassingly, I'm having a hard time trying to do something that seems simple: geting the difference between 2 times.
...
Simplest way to wait some asynchronous tasks complete, in Javascript?
...callback) {
conn.collection(name).drop(function(err) {
if (err)
return callback(err);
console.log('dropped');
callback(null, name);
});
}
)});
async.parallel(calls, function(err, result) {
/* this code will run after all ca...
Modulo operation with negative numbers
...mple A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen if 5%(-3) is 2.
Example B. (-5)/3 is -1
=> (-1) * 3 + (-5)%3 = -5
This can only happen if (-5)%3 is -2
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How can I calculate the difference between two dates?
...ts will always be time-zone-agnostic.
Furthermore, this documentation specifies that Cocoa's implementation of time does not account for leap seconds, so if you require such accuracy, you will need to roll your own implementation.
...
Checkout another branch when there are uncommitted changes on the current branch
...you run:
git checkout branch2
Sometimes Git says "OK, you're on branch2 now!" Sometimes, Git says "I can't do that, I'd lose some of your changes."
If Git won't let you do it, you have to commit your changes, to save them somewhere permanent. You may want to use git stash to save them; this is...
PostgreSQL database default location on Linux
... server.
The location of the data directory depends on the distribution. If you install from source, the default is /usr/local/pgsql/data:
In file system terms, a database
cluster will be a single directory
under which all data will be stored.
We call this the data directory or
data ar...
'Contains()' workaround using Linq to Entities?
... TValue>> selector,
IEnumerable<TValue> collection
)
{
if (selector == null) throw new ArgumentNullException("selector");
if (collection == null) throw new ArgumentNullException("collection");
if (!collection.Any())
return query.Where(t => false);
ParameterExpressi...
What is the use of making constructor private in a class?
...
@Will: Not if you use reflection. Declaring constructors private is intended to prevent instantiation (barring reflection), but preventing subclassing is a side effect, not the intent. The appropriate tool for this is declaring the cla...
Twitter Bootstrap Tabs: Go to Specific Tab on Page Reload or Hyperlink
... few minor issues, one of which is I do not know how go directly to a specific tab from an external link. For example:
24 ...
How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
...method timestamp:
import datetime
seconds_since_epoch = datetime.datetime.now().timestamp()
Your question stated that you needed milliseconds, which you can get like this:
milliseconds_since_epoch = datetime.datetime.now().timestamp() * 1000
If you use timestamp on a naive datetime object, the...