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Default template arguments for function templates
... template arguments for function templates is a misbegotten remnant of the time where freestanding functions were treated as second class citizens and required all template arguments to be deduced from the function arguments rather than specified.
The restriction seriously cramps programming st...
Are the days of passing const std::string & as a parameter over?
...e worst case of something is bound by a constant, then it's still constant time. Is there not a longest small string? Doesn't that string take some constant amount of time to copy? Don't all smaller strings take less time to copy? Then, string copying for small strings is "constant time" in orde...
What is the fastest way to compute sin and cos together?
...pport it.
Edit:
Intel's documentation states that FSINCOS is just about 5 times slower than FDIV (i.e., floating point division).
Edit:
Please note that not all modern compilers optimize calculation of sine and cosine into a call to FSINCOS. In particular, my VS 2008 didn't do it that way.
Edit:
...
Why C# fails to compare two object types with each other but VB doesn't?
... the ==, you can get different behaviour - but that's based on the compile-time type of the expressions. For example, string provides ==(string, string):
string x = new string("foo".ToCharArray());
string y = new string("foo".ToCharArray());
Console.WriteLine(x == y); // True
Console.WriteLine((obj...
How to detect internet speed in JavaScript?
...oad image with a known file size then in its onload event measure how much time passed until that event was triggered, and divide this time in the image file size.
Example can be found here: Calculate speed using javascript
Test case applying the fix suggested there:
//JUST AN EXAMPLE, PLEASE...
Convert from MySQL datetime to another format with PHP
I have a datetime column in MySQL.
18 Answers
18
...
How to automatically install Emacs packages by specifying a list of package names?
...ts)) from the accepted answer. The package refresh here increases startup time on systems that already have the packages installed. The rest of this answer is perfect, though.
– rfinz
Feb 26 '14 at 21:47
...
Swift: #warning equivalent
...TAGS)/ warning: \$1/"
This will force Xcode to flag a warning at compile time for any // TODO: or // FIXME: comments you markup.
Alternatively, you could amend TAGS with a custom tag: TAGS="WARNING:" in the above code which would keep the default behaviour for TODO & FIXME and would raise a c...
What is token-based authentication?
...can offer the token - which
offers access to a specific resource
for a time period - to the remote
site.
In other words: add one level of indirection for authentication -- instead of having to authenticate with username and password for each protected resource, the user authenticates that wa...
How to access the ith column of a NumPy multidimensional array?
...
And if you want to access more than one column at a time you could do:
>>> test = np.arange(9).reshape((3,3))
>>> test
array([[0, 1, 2],
[3, 4, 5],
[6, 7, 8]])
>>> test[:,[0,2]]
array([[0, 2],
[3, 5],
[6, 8]])
...