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What is the best way to ensure only one instance of a Bash script is running? [duplicate]
...ased my lockable script boilerplate (originally available at my wiki page, nowadays available as gist). Transforming that into one-instance-per-user is trivial. Using it you can also easily write scripts for other scenarios requiring some locking or synchronization.
Here is the mentioned boilerplat...
What is the use of static constructors?
...ment;
static string urlFragment = "foo/bar";
}
Your fullUrl value is now just "http://www.example.com/" since urlFragment hadn't been initialized at the time fullUrl was being set. Not good. So, you add a static constructor to take care of the initialization:
class ScopeMonitor
{
static...
Catch an exception thrown by an async void method
... I actually mean it's straight-forward to read - whereas I know what's actually going on is really complicated - so my brain is telling me not to believe my eyes...
– Stuart
Mar 21 '11 at 21:01
...
Multiple Inheritance in PHP
...patcher that sends the Message passed using text or html backend. I don't know your code, but let me simulate it this way:
$m = new Message();
$m->type = 'text/html';
$m->from = 'John Doe <jdoe@yahoo.com>';
$m->to = 'Random Hacker <rh@gmail.com>';
$m->subject = 'Invitation e...
iPad keyboard will not dismiss if modal ViewController presentation style is UIModalPresentationForm
...eem to be a way to work around it.
UPDATE:
In iOS 4.3 and later, you can now implement `-disablesAutomaticKeyboardDismissal' on your view controller to return NO:
- (BOOL)disablesAutomaticKeyboardDismissal {
return NO;
}
This fixes the issue.
...
Hidden features of Perl?
...
There are many non-obvious features in Perl.
For example, did you know that there can be a space after a sigil?
$ perl -wle 'my $x = 3; print $ x'
3
Or that you can give subs numeric names if you use symbolic references?
$ perl -lwe '*4 = sub { print "yes" }; 4->()'
yes
There's a...
(HTML) Download a PDF file instead of opening them in browser when clicked
...at is that this was answered 4 years ago and as Sarim points out, there is now the HTML 5 download attribute that can handle this.
I agree, and think Sarim's answer is good (it probably should be the chosen answer if the OP ever returns). However, this answer is still the reliable way to handle it...
What is the use of join() in Python threading?
...t joining a demonized thread opens most likely a whole can of trouble! I'm now considering to remove the join() call in my little diagram for the daemon-thread...
– Don Question
Mar 3 '15 at 17:15
...
How to upload a file in Django? [closed]
... 2 hours to dig up all the pieces to understand how this works. With that knowledge I implemented a project that makes possible to upload files and show them as list. To download source for the project, visit https://github.com/axelpale/minimal-django-file-upload-example or clone it:
> git clon...
iOS 7 status bar back to iOS 6 default style in iPhone app?
...l to add a vertical spacing constraint to the nearest neighbor, which will now be the top layout guide. Alternatively you can use ctrl+click from your object to the top layout guide to add a vertical spacing constraint explicitly.
– BreadicalMD
Sep 27 '13 at 13...