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A migration to add unique constraint to a combination of columns
... of days. As this is well over the average lifespan of a human being, this means that a DOB clash is mathematically certain.
All I'm saying is that that particular combination of unique fields could lead to extreme user/customer frustration in future.
Consider something that's actually unique, li...
Always pass weak reference of self into block in ARC?
...hen there is no other group have strong reference of A and B outside -- it means we cannot reach these two object(we cannot control A to release B and vice versa), therefor, A and B reference each other to keep themselves both alive.
– Danyun Liu
Nov 17 '13 at ...
Android ViewPager with bottom dots
... @vsp DotIndicator implements the SelectionIndicator interface, which means if has two useful methods which can solve your problem: int getNumberOfItems() and void setNumberOfItems(). Rather than catching the exception, you could do something like this gist.github.com/MatthewTamlin/761c7338d271...
What does LayoutInflater in Android do?
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LayoutInflater.inflate() provides a means to convert a res/layout/*.xml file defining a view into an actual View object usable in your application source code.
basic two steps: get the inflater and then inflate the resource
How do you get the inflater?
Layo...
“No X11 DISPLAY variable” - what does it mean?
I am trying to install a Java application on my Linux machine (Slackware).
10 Answers
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Why does integer overflow on x86 with GCC cause an infinite loop?
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When the standard says it's undefined behavior, it means it. Anything can happen. "Anything" includes "usually integers wrap around, but on occasion weird stuff happens".
Yes, on x86 CPUs, integers usually wrap the way you expect. This is one of those exceptions. The compile...
There is already an open DataReader associated with this Command which must be closed first
...m the MARS Documentation page: "MARS operations are not thread-safe." That means, if the problem arises from multiple threads accessing the Context, MARS is (probably) not the solution.
– marsop
Jan 27 '17 at 15:27
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socket.error: [Errno 48] Address already in use
...ile). These signals are integers (each with a name), the default being 15, meaning TERM or terminate. Using -9 sends signal 9, KILL, which a process can't catch and ignore, and the OS will end the process wether it likes to or not.
– Martijn Pieters♦
Mar 17 '...
Using column alias in WHERE clause of MySQL query produces an error
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@Agamemnus, What do you mean by that?
– Pacerier
Apr 9 '15 at 21:36
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Understanding reference counting with Cocoa and Objective-C
...constant and entirely irrelevant.... doesn't make the answer wrong, by any means, just reinforces the fact that absolute retain counts are never really something you should worry about.
– bbum
Jul 11 '10 at 23:37
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