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python max function using 'key' and lambda expression
...that the function should accept the items passed to it by max, min, sorted etc properly. Plus I have mentioned max(lis, key=int) right at the end. :-)
– Ashwini Chaudhary
Aug 19 '15 at 6:55
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Setting PayPal return URL and making it auto return?
...PayPal will send requests to that page to notify you when payments/refunds/etc. go through. That IPN handler page would then be the correct place to update the database to mark orders as having been paid.
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What does SynchronizationContext do?
...SynchronizationContext, ThreadPool.QueueUserWorkItem, control.BeginInvoke, etc. over to the new async / await keywords and the Task Parallel Library (TPL), i.e. the API surrounding the Task and Task<TResult> classes. These will, to a very high degree, take care of capturing the UI thread's syn...
How to check if an object is a certain type
...s makes them easy to distinguish at a glance from classes, types, methods, etc.
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Once upon a time, when > was faster than < … Wait, what?
...ntions that we can perform custom depth tests, such as GL_LESS, GL_ALWAYS, etc. He also explains that the actual meaning of depth values (which is top and which isn't) can also be customized. I understand so far. And then the author says something unbelievable:
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What is the difference between “px”, “dip”, “dp” and “sp”?
...he same on a multitude of devices. So even if the physical size of buttons etc changes a little bit, the overall look of an activity will be the same.
– intrepidis
Jun 15 '13 at 7:03
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What is external linkage and internal linkage?
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When you write an implementation file (.cpp, .cxx, etc) your compiler generates a translation unit. This is the source file from your implementation plus all the headers you #included in it.
Internal linkage refers to everything only in scope of a translation unit.
Externa...
What is a “thread” (really)?
...is loaded in the processor core, the thread is running. The processor is fetching instructions demanded by the thread and updating the thread registers. When a context switch is needed, the processor saves this set of register values into memory and loads a set belonging to a different thread, typ...
How does BLAS get such extreme performance?
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Most arguments to the second question -- assembler, splitting into blocks etc. (but not the less than N^3 algorithms, they are really overdeveloped) -- play a role. But the low velocity of your algorithm is caused essentially by matrix size and the unfortunate arrangement of the three nested loops....
Position of least significant bit that is set
... set bit, or the highest set bit, or counting the number of leading zeroes etc.
If you have any one instruction of this class you can cheaply emulate the others.
Take a moment to work through it on paper and realise that x & (x-1) will clear the lowest set bit in x, and ( x & ~(x-1) ) will...