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namedtuple and default values for optional keyword arguments
...>> Node()
Node(val=None, left=None, right=None)
Before Python 3.7
Set Node.__new__.__defaults__ to the default values.
>>> from collections import namedtuple
>>> Node = namedtuple('Node', 'val left right')
>>> Node.__new__.__defaults__ = (None,) * len(Node._field...
The definitive guide to form-based website authentication [closed]
...iven the perceived (though now avoidable) cost and technical difficulty of setting up an SSL certificate on your website, some developers are tempted to roll their own in-browser hashing or encryption schemes in order to avoid passing cleartext logins over an unsecured wire.
While this is a noble th...
Dual emission of constructor symbols
...e improved in the future.
This newsgroup posting describes a problem with setting breakpoints in constructors due to this dual-emission. It's stated again that the root of the issue is support for polymorphism.
In fact, this is listed as a GCC "known issue":
G++ emits two copies of constructors ...
Determining 32 vs 64 bit in C++
...rs use for determining if it's a 64 bit environment or not and use that to set my variables.
// Check windows
#if _WIN32 || _WIN64
#if _WIN64
#define ENVIRONMENT64
#else
#define ENVIRONMENT32
#endif
#endif
// Check GCC
#if __GNUC__
#if __x86_64__ || __ppc64__
#define ENVIRONMENT64
#else
#define ...
How to quickly edit values in table in SQL Server Management Studio?
... > Options. In the tree on the left, select SQL Server Object Explorer. Set the option "Value for Edit Top Rows command" to 0. It'll now allow you to view and edit the entire table from the context menu.
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PHP expects T_PAAMAYIM_NEKUDOTAYIM?
...t could represent a value which is meant to be changed by a user - like DB settings or some true / false values and other value types which the code developer don't know at design-time. This is common for APIs or code frameworks. I just don't understand why the developers of the Zend parser didn't u...
Understanding Fragment's setRetainInstance(boolean)
...
As far as I can tell, if you have setRetainInstance(true), the Fragment java object, and all its contents are not destroyed on rotation, but the view is recreated. That is onCreatedView() is called again. It's basically the way it should have worked with Acti...
.htaccess rewrite to redirect root URL to subdirectory
...ex page candidate in the dir then it overrides the mod_rewrite, UNLESS you set: DirectoryCheckHandler On
– Gerrit
Apr 10 '18 at 19:47
...
how to unit test file upload in django
In my django app, I have a view which accomplishes file upload.The core snippet is like this
10 Answers
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Update a table using JOIN in SQL Server?
...n the CommonField and also filter on it afterward. Try this:
UPDATE t1
SET t1.CalculatedColumn = t2.[Calculated Column]
FROM dbo.Table1 AS t1
INNER JOIN dbo.Table2 AS t2
ON t1.CommonField = t2.[Common Field]
WHERE t1.BatchNo = '110';
If you're doing something really silly - like consta...