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mongoDB/mongoose: unique if not null
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Awesome! Definitely the best answer for newbs like me after 1.8! NOTE: Mongoose won't update your unique index to be sparse if you just add a sparse : true to your schema. You have to drop and re-add the index. Dunno if that's ex...
Why is Go so slow (compared to Java)?
As we could see from The Computer Language Benchmarks Game in 2010:
10 Answers
10
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How and/or why is merging in Git better than in SVN?
...main reasons why distributed version control systems shine, is much better merging than in traditional tools like SVN.
Is this actually due to inherent differences in how the two systems work, or do specific DVCS implementations like Git/Mercurial just have cleverer merging algorithms than SVN?
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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...secure alternative.
If you do not need it to be absolutely unique over time:
md5(uniqid(rand(), true))
Otherwise (given you have already determined a unique login for your user):
md5(uniqid($your_user_login, true))
sha...
What exactly is RESTful programming?
...rchitecture does not require these "pretty URLs". A GET request with a parameter
http://myserver.com/catalog?item=1729
is every bit as RESTful.
Keep in mind that GET requests should never be used for updating information. For example, a GET request for adding an item to a cart
http://myserver.c...
What's the difference between Invoke() and BeginInvoke()
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Do you mean Delegate.Invoke/BeginInvoke or Control.Invoke/BeginInvoke?
Delegate.Invoke: Executes synchronously, on the same thread.
Delegate.BeginInvoke: Executes asynchronously, on a threadpool thread.
Control.Invoke: Executes on...
How to properly compare two Integers in Java?
...stem.out.println(x == y);
this will check whether x and y refer to the same object rather than equal objects.
So
Integer x = new Integer(10);
Integer y = new Integer(10);
System.out.println(x == y);
is guaranteed to print false. Interning of "small" autoboxed values can lead to tricky results...
PDO's query vs execute
Are they both do the same thing, only differently?
3 Answers
3
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Moving Files into a Real Folder in Xcode
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A modern (and dead simple!) approach for 2017 (Xcode 6, 7, 8, and sometimes 9, since it does it automagically some of the time):
If you're moving a bunch of files into a new folder and are keeping the child hierarchy, it's actually a lot easier than moving each file individually:
Create ne...
What is the basic difference between the Factory and Abstract Factory Design Patterns? [closed]
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With the Factory pattern, you produce instances of implementations (Apple, Banana, Cherry, etc.) of a particular interface -- say, IFruit.
With the Abstract Factory pattern, you provide a way for anyone to provide their own factory. This allows your warehouse to be either an IFru...