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Purpose of Unions in C and C++
...lier comfortably; today I was alarmed when I read this post and came to know that this code
15 Answers
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What does the caret operator (^) in Python do?
...r):
return self ** other
Then something like this will work, and now, for instances of Foo only, the ^ symbol will mean exponentiation.
In [16]: x = Foo(3)
In [17]: x
Out[17]: 3.0
In [18]: x ^ 4
Out[18]: 81.0
s...
What is the difference between a definition and a declaration?
...ng that's been declared and referenced somewhere, then the linker doesn't know what to link references to and complains about a missing symbols. If you define something more than once, then the linker doesn't know which of the definitions to link references to and complains about duplicated symbols....
Using Linq to group a list of objects into a new grouped list of list of objects
I don't know if this is possible in Linq but here goes...
4 Answers
4
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jquery input select all on focus
... the rub is that we really do want to handle the focus event. It lets us know the first time that someone has entered the field. After that point, we don't want to continue to override user selection behavior.
The Solution:
Instead, within the focus event handler, we can quickly attach listeners f...
Can you pass parameters to an AngularJS controller on creation?
...e. Soon you'll want to re-use that template, but with different config and now in order to do so you'll either be pre-processing the templates to inject variables before it gets passed to angular or using massive directives to spit out giant blocks of HTML so you re-use all of the controller HTML ex...
Determine a string's encoding in C#
...
//////////// If the code reaches here, no BOM/signature was found, so now
//////////// we need to 'taste' the file to see if can manually discover
//////////// the encoding. A high taster value is desired for UTF-8
if (taster == 0 || taster > b.Length) taster = b.Length; // Ta...
How can I install from a git subdirectory with pip?
... while until it gets merged to master and is distributed.
UPDATE: This is now available and documented at https://pip.readthedocs.io/en/stable/reference/pip_install/#vcs-support as follows:
For projects where setup.py is not in the root of project,
"subdirectory" component is used. Value of "...
How to call a stored procedure from Java and JPA
...
JPA 2.1 now support Stored Procedure, read the Java doc here.
Example:
StoredProcedureQuery storedProcedure = em.createStoredProcedureQuery("sales_tax");
// set parameters
storedProcedure.registerStoredProcedureParameter("subtotal"...
C#: Difference between List and Collection (CA1002, Do not expose generic lists) [duplicate]
...tification events) when the collection is changed.
You may not need this now, but it is a common requirement for classes that contain collections, so it's best to plan for it in advance. Because Collection is designed with extensibility in mind it's very flexible. If in the future you decide you n...