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What kind of virtual machine is BEAM (the Erlang VM)?
...es to OS processes, for example isolation. There is actually an Erlang VM, based on the BEAM, which runs on bare metal and is in fact an OS in its own right, see
Erlang on Xen.
By the way, it is perfectly possible to have systems running millions of Erlang processes and it is actually done in some ...
Difference: std::runtime_error vs std::exception()
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std::exception is the class whose only purpose is to serve as the base class in the exception hierarchy. It has no other uses. In other words, conceptually it is an abstract class (even though it is not defined as abstract class in C++ meaning of the term).
std::runtime_error is a more spe...
Adaptive segue in storyboard Xcode 6. Is push deprecated?
...rd segues if possible by using the prepareForSegue to add required actions based on destination view controller. Or if you must to mix and match, take the precaution to verify that your Show segues do not have any actions attached in the storyboard xml. If you are dealing with older projects then yo...
iOS Detect 3G or WiFi
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I made a pretty simple block based Reachability wrapper that strips all the outdated C-like Reachability code, poured into a much more Cocoa form.
Usage like:
[EPPZReachability reachHost:hostNameOrIPaddress
completition:^(EPPZReachabilit...
How to define a reply-to address?
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Two ways:
class Notifications < ActionMailer::Base
default :from => 'your_app@your_domain.com',
:reply_to => 'some_other_address@your_domain.com'
end
Or:
class Contacts < ActionMailer::Base
def new_contact
mail( :to => 'somebody...
How to get current location in Android [duplicate]
...at you have added the permission on the Manifest,
For using only network based location use this one
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
For GPS based location, this one
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>...
When vectors are allocated, do they use memory on the heap or the stack?
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You could use heap based allocation for everything and have a "cleanup stack" that manages automatic storage (and possibly delete too).
– Flexo♦
Nov 7 '11 at 15:38
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How to truncate the time on a DateTime object in Python?
...The advantage compared to the .replace() method is that datetime.combine()-based solution will continue to work even if datetime module introduces the nanoseconds support.
tzinfo can be preserved if necessary but the utc offset may be different at midnight e.g., due to a DST transition and therefor...
How to continue a Docker container which has exited
...me/id> /bin/sh
The /bin/sh is the shell usually available with alpine-based images.
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Change a branch name in a Git repo
...y to push with git push because you gent a warning whi says Your branch is based on 'old_name, but the upstream is gone. A git push -u origin new_name solve it.
– netalex
Feb 8 '19 at 15:07
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