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Equivalent of varchar(max) in MySQL?
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As the data in the MAX column fills an 8KB data page an overflow page is allocated and the previous page points to it forming a linked list. Unlike TEXT, NTEXT, and BLOB the varchar(max) column type supports all the same query semantics as other column types.
So varchar(MAX) really means varchar(A...
scala vs java, performance and memory? [closed]
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Well, Rex's solution preallocates the memory for the array, which will make the compiled code run faster (because with your approach, you let the JVM periodically reallocate your array as it grows). Even though there was more typing involved, perfor...
Objective-C ARC: strong vs retain and weak vs assign
... don't point to it anymore"
in other words " I'am the owner, you cannot dealloc this before aim fine with that same as retain"
You use strong only if you need to retain the object.
By default all instance variables and local variables are strong pointers.
We generally use strong for UIViewControlle...
Why not use Double or Float to represent currency?
...y don't call for a lot of math, the operations consist of adding things or allocating amounts to different buckets. Introducing floating point and rounding just complicates things.
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Manual deployment vs. Amazon Elastic Beanstalk
...osed to be free but AWS doesn't make it obvious that each environment will allocated a load balancer that will cost you around $15 a month. I wasn't comparing with a micro instance.
– Ken Liu
Aug 21 '13 at 15:25
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Some questions about Automatic Reference Counting in iOS5 SDK
..." tool (in the Edit->Refactor menu), which does that for you. Calling dealloc is a different story. As mentioned in the comments the clang reference states that you should keep your the dealloc method:
Rationale: even though ARC destroys instance variables automatically, there are still legitima...
How do you test functions and closures for equality?
...e in Java, but there's it's more obvious). These closures objects are heap allocated, and store the data captured by the closure, which act like implicit parameter's to the closure's function. The closure object holds a reference to a function which operates upon the explicit (via func args) and imp...
Best practices for SQL varchar column length [closed]
...it is still predicitve i use varchar and keep 255 as it is dynamic memory allocation so you do not worry about the size that will be taken
– Faris Rayhan
Jun 21 '16 at 9:04
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Which concurrent Queue implementation should I use in Java?
...Queue will have a much worse memory footprint - it still has a large array allocated in memory the whole time, while the LinkedBlockingQueue will have a negligible memory footprint when close to empty.
– Krease
Aug 8 '14 at 23:13
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Android static object lifecycle
...cation?
The OS starts a process and assigns it a unique process id and allocates a process table.A process start an instance of DVM(Dalvik VM); Each application runs inside a DVM.
A DVM manages class loading unloading, instance lifecycle, GC etc.
Lifetime of a static variable: A static variable...