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Create singleton using GCD's dispatch_once in Objective-C
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@Dave DeLong: In my opinion purpose of having singleton is not a certainty of its immortality, but certainty that we have one instance. What if that singleton decrement a semaphore? You can't just arbitrary say that it will always exists.
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What is the proper way to check for null values?
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This was the most direct answer to my question so I'm marking the answer, but Jon Skeet's extension method .ToStringOrDefault() is my preferred way of doing it. However, I am using this answer within Jon's extension method ;)
– Chev
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Where is a complete example of logging.config.dictConfig?
... 'level': 'WARNING',
'propagate': False
},
'my.packg': {
'handlers': ['default'],
'level': 'INFO',
'propagate': False
},
'__main__': { # if __name__ == '__main__'
'handlers': ['default'],
'le...
KnockOutJS - Multiple ViewModels in a single View
I'm thinking that my application is getting quite large now, too large to handle each View with a single ViewModel.
5 Answe...
The difference between sys.stdout.write and print?
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My question is whether or not there
are situations in which
sys.stdout.write() is preferable to
print
After finishing developing a script the other day, I uploaded it to a unix server. All my debug messages used print...
When are you truly forced to use UUID as part of the design?
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I wrote the UUID generator/parser for Ruby, so I consider myself to be reasonably well-informed on the subject. There are four major UUID versions:
Version 4 UUIDs are essentially just 16 bytes of randomness pulled from a cryptographically secure random number generator, with some ...
Create an empty object in JavaScript with {} or new Object()?
...h), and allows you to instantly populate the object inline - like so:
var myObject = {
title: 'Frog',
url: '/img/picture.jpg',
width: 300,
height: 200
};
Arrays
For arrays, there's similarly almost no benefit to ever using new Array(); over []; - with o...
GitHub “fatal: remote origin already exists”
...Short,
git remote rm origin
git remote add origin git@github.com:username/myapp.git
Worked !
Cheers!
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How might I find the largest number contained in a JavaScript array?
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What if my array length is bigger than parameter count limit ?
– lukas.pukenis
Oct 3 '13 at 14:20
3
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iFrame src change event detection?
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What if I'm using Web Components and one of my custom components has an src attribute? I think this would accidentally pick it up.
– Luke
Jan 19 '16 at 23:36
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