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Why is “if not someobj:” better than “if someobj == None:” in Python?
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In the first test, Python try to convert the object to a bool value if it is not already one. Roughly, we are asking the object : are you meaningful or not ? This is done using the following algorithm :
If the object has a __nonzero__ special method (as do numeric built-ins, int and float),...
iOS application: how to clear notifications?
I've an iOS application where some Push Notification are sent to. My problem is, that the messages/notifications stays in the Notification Center in iOS after then are tapped. How can I remove a notification for my application in the Notification Center next time the application opens?
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How to create empty text file from a batch file?
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@Reegan If you used echo 2 without the ., the console would read "ECHO is off." Using echo. 2 effectively silences console output by only displaying a newline.
– OneManBand
Nov 19 '14 at 19:28
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Amazon Interview Question: Design an OO parking lot [closed]
...ull, empty and also be able to find spot for Valet parking. The lot has 3 different types of parking: regular, handicapped and compact.
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How to get MD5 sum of a string using python?
...ate('your string').hexdigest(), it won't work since update() returns None. If you want a one line solution, use Mark Longair's answer.
– Christopher Manning
Nov 16 '11 at 18:39
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Position Relative vs Absolute?
What is the difference between position: relative and position: absolute in CSS? And when should you use them?
10 Answe...
Unix shell script find out which directory the script file resides?
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This doesn't work if you've called the script via a symbolic link in a different directory. To make that work you need to use readlink as well (see al's answer below)
– AndrewR
Mar 17 '10 at 23:26
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How to convert `git:` urls to `http:` urls
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This worked for me in public WiFi with blocked 22 port. How config can be reverted to defaults?
– yivo
Nov 28 '16 at 17:44
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Where do gems install?
...you can check:
echo $GEM_HOME
Bundler
$ bundle show --paths
For specific gem:
$ bundle show 'gem_name'
Gem
$ gem env
For specific gem:
$ gem which 'gem_name'
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MVC 5 Seed Users and Roles
...d override void Seed(SecurityModule.DataContexts.IdentityDb context)
{
if (!context.Roles.Any(r => r.Name == "AppAdmin"))
{
var store = new RoleStore<IdentityRole>(context);
var manager = new RoleManager<IdentityRole>(store);
var role = new IdentityRole...