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When does invoking a member function on a null instance result in undefined behavior?
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How to determine if a number is a prime with regex?
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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
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Sticky and NON-Sticky sessions
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How to get current foreground activity context in android?
...unning Activity by
ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
ComponentName cn = am.getRunningTasks(1).get(0).topActivity;
UPDATE 2018/10/03
getRunningTasks() is DEPRECATED. see the solutions below.
This method was deprecated in API level 21.
As of ...
What does it mean to hydrate an object?
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mongodb group values by multiple fields
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How to implement has_many :through relationships with Mongoid and mongodb?
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Setting an object to null vs Dispose()
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Why is volatile needed in C?
...cations (e.g. memory mapped ports or memory referenced by ISRs [ Interrupt Service Routines ] ), some optimizations must be suspended. volatile exists for specifying special treatment for such locations, specifically: (1) the content of a volatile variable is "unstable" (can change by means unknown ...