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What's the difference between design patterns and architectural patterns?
... sort are all algorithmic patterns for organizing a group of elements in a order.
For a most simplistic view:
Programming paradigms - specific to programming language
Design patterns - solves reoccurring problems in software construction
Architectural patterns - fundamental structural organizatio...
How to get temporary folder for current user
...unction checks for the existence of environment variables in the following order and uses the first path found:
The path specified by the TMP environment variable.
The path specified by the TEMP environment variable.
The path specified by the USERPROFILE environment variable.
The Windows directory....
Duplicate symbols for architecture x86_64 under Xcode
...at defines an Objective-C class or category. While this option will
typically result in a larger executable (due to additional object code
loaded into the application), it will allow the successful creation of
effective Objective-C static libraries that contain categories on
existing classes...
How to send a command to all panes in tmux?
I like to call :clear-history on panes with a huge scrollback. However, I want to script a way to send this command to all the panes in the various windows.
...
Reason for Column is invalid in the select list because it is not contained in either an aggregate f
...s you have).
In that case, lose the GROUP BY statement. All you need is ORDER BY loc.LocationID
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What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
I just started using Qt and noticed that all the example class definitions have the macro Q_OBJECT as the first line. What is the purpose of this preprocessor macro?
...
C/C++ line number
...processor variables :
__func__ : function name (this is part of C99, not all C++ compilers support it)
__DATE__ : a string of form "Mmm dd yyyy"
__TIME__ : a string of form "hh:mm:ss"
Your code will be :
if(!Logical)
printf("Not logical value at line number %d in file %s\n", __LINE__, __FIL...
Rank items in an array using Python/NumPy, without sorting array twice
...
Use argsort twice, first to obtain the order of the array, then to obtain ranking:
array = numpy.array([4,2,7,1])
order = array.argsort()
ranks = order.argsort()
When dealing with 2D (or higher dimensional) arrays, be sure to pass an axis argument to argsort to...
Where is the documentation for the values() method of Enum?
...od that returns an
array containing all of the values of the enum in the order they are
declared. This method is commonly used in combination with the
for-each construct to iterate over the values of an enum type.
Enum.valueOf class(The special implicit values method is mentioned in descrip...
A beginner's guide to SQL database design [closed]
...n:
Keep different types of data separate - don't store addresses in your order table, link to an address in a separate addresses table, for example.
I personally like having an integer or long surrogate key on each table (that holds data, not those that link different tables together, e,g., m:n re...