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What is the difference between a 'closure' and a 'lambda'?
... )
OK, now it's time to solve the other mystery: what is a closure.
In order to do that, let's talk about symbols (variables) in lambda expressions.
As I said, what the lambda abstraction does is binding a symbol in its subexpression, so that it becomes a substitutible parameter. Such a symbol ...
Changing Ctrl + Tab behavior for moving between documents in Visual Studio
...extDocumentWindow (Ctrl+F6) although that seems to cycle tabs in a strange order.
– DGreen
Apr 30 '13 at 13:49
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How to fix “Headers already sent” error in PHP
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Unintentional:
Whitespace before <?php or after ?>
The UTF-8 Byte Order Mark specifically
Previous error messages or notices
Intentional:
print, echo and other functions producing output
Raw <html> sections prior <?php code.
Why does it happen?
To understand why header...
What is a good reason to use SQL views?
...most useful when you always need
to join the same set of tables say an
Order with an Order Detail to get
summary calculation fields etc.
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How to get first element in a list of tuples?
...tually a list of sets, then there is no first element because sets have no order.
Here I've created a flat list because generally that seems more useful than creating a list of 1 element tuples. However, you can easily create a list of 1 element tuples by just replacing seq[0] with (seq[0],).
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Is it expensive to use try-catch blocks even if an exception is never thrown?
...erved as though its statements, as written in the source code, executed in order up to some line.
Because in a try block an exception can be thrown (at any line in the try block! Some exceptions are thrown asynchronously, such as by calling stop on a Thread (which is deprecated), and even besides t...
How to wait for all threads to finish, using ExecutorService?
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I can't believe that you have to use shutdown in order to join on all the current threads (after using shutdown, you cannot use the executor again ever). Suggest using list of Future's instead...
– rogerdpack
Nov 2 '12 at 16:02
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Should we pass a shared_ptr by reference or by value?
... slightly slower than plain old increment/decrement code, but is needed in order to be thread safe. Beyond that, the two methods are the same for most intents and purposes.
– Evan Teran
Jul 29 '10 at 2:02
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Get the Row(s) which have the max count in groups using groupby
...s) I found it to be very slow. Here is an alternative that I found to run orders of magnitude faster on my data set.
df = pd.DataFrame({
'sp' : ['MM1', 'MM1', 'MM1', 'MM2', 'MM2', 'MM2', 'MM4', 'MM4', 'MM4'],
'mt' : ['S1', 'S1', 'S3', 'S3', 'S4', 'S4', 'S2', 'S2', 'S2'],
'val' : ['a', ...
How do you enable “Enable .NET Framework source stepping”?
....dll independent of the other dlls that should get rolled back with it (in order for it to work properly). Furthermore, temporary updating the GAC with old dlls would essentially be equivalent to temporarily uninstalling the security update.
– Matt Smith
Sep 2...