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Why use the INCLUDE clause when creating an index?
... @gbn, would you mind explaining this sentence in more detail, and explain why it means that the include clause is not useful for sorting, etc: "The INCLUDE clause adds the data at the lowest/leaf level, rather than in the index tree. This makes the index smaller because it's not part of...
++someVariable vs. someVariable++ in JavaScript
... the value of the expression is the original value"
Now when used as a standalone statement, they mean the same thing:
x++;
++x;
The difference comes when you use the value of the expression elsewhere. For example:
x = 0;
y = array[x++]; // This will get array[0]
x = 0;
y = array[++x]; // Thi...
What is the difference between onBlur and onChange attribute in HTML?
...onChange event is only called when you have changed the value of the field and it loses focus.
You might want to take a look at quirksmode's intro to events. This is a great place to get info on what's going on in your browser when you interact with it. His book is good too.
...
Why not infer template parameter from constructor?
... the only point of entry of the class (I am talking about copy constructor and operator=). So suppose you are using your class like this :
MyClass m(string s);
MyClass *pm;
*pm = m;
I am not sure if it would be so obvious for the parser to know what template type is the MyClass pm;
Not sure if ...
Getting MAC Address
...dress of a computer at run time. For windows the 'wmi' module can be used and the only method under Linux I could find was to run ifconfig and run a regex across its output. I don't like using a package that only works on one OS, and parsing the output of another program doesn't seem very elegant ...
Best programming aids for a quadriplegic programmer
... the heading of, "There, but for the grace of God, go you or I." This is brand new territory for me so I'm asking for some serious help here.
...
What is the purpose of the -m switch?
...line of the Rationale section of PEP 338 says:
Python 2.4 adds the command line switch -m to allow modules to be located using the Python module namespace for execution as scripts. The motivating examples were standard library modules such as pdb and profile, and the Python 2.4 implementation is...
How do negative margins in CSS work and why is (margin-top:-5 != margin-bottom:5)?
...
Negative margins are valid in css and understanding their (compliant) behaviour is mainly based on the box model and margin collapsing. While certain scenarios are more complex, a lot of common mistakes can be avoided after studying the spec.
For instance, r...
How can I write a heredoc to a file in Bash script?
...able $FOO will not be interpreted.
EOF
To pipe the heredoc through a command pipeline:
cat <<'EOF' | sed 's/a/b/'
foo
bar
baz
EOF
Output:
foo
bbr
bbz
... or to write the the heredoc to a file using sudo:
cat <<'EOF' | sed 's/a/b/' | sudo tee /etc/config_file.conf
foo
bar
baz
E...
How to install XNA game studio on Visual Studio 2012?
...ws 8.1/VS2012 to play nicely with XNA. What can I say, it works. Well done and thanks.
– Gareth
Jan 23 '14 at 20:19
Th...