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Concatenate two slices in Go
... special case, append also accepts
a first argument assignable to type []byte with a second argument of
string type followed by .... This form appends the bytes of the
string.
append(s S, x ...T) S // T is the element type of S
s0 := []int{0, 0}
s1 := append(s0, 2) // append a single...
New Line on PHP CLI
...
@KingCrunch what you mean by "inter-platform compatibility"?
– edigu
Sep 12 '14 at 6:36
...
generating GUID without hyphen
... with the Guid.ToString(String) overload.
Guid.NewGuid().ToString("N");
By default letters are lowercase. A Guid with only uppercase letters can only be achieved by manually converting them all to uppercase, example:
Guid.NewGuid().ToString("N").ToUpper();
A guid with only either letter or dig...
Laravel redirect back to original destination after login
...ort from the framework itself. Nowadays you can use the method pointed out by bgdrl below this method: (I've tried updating his answer, but it seems he won't accept)
On auth filter:
// redirect the user to "/login"
// and stores the url being accessed on session
Route::filter('auth', function() {
...
What's the recommended approach to resetting migration history using Django South?
...re are any third party apps using
south in the project, as pointed out by @thnee below. Since your
answer has so many upvotes I'd really appreciate it if you could edit
it and add at least a warning about this, or (even better) change it
to reflect @hobs approach (which is just as co...
Code coverage with Mocha
...n additional library for code coverage, and you are going to be blown away by how powerful and easy istanbul is. Try the following, after you get your mocha tests to pass:
npm install nyc
Now, simply place the command nyc in front of your existing test command, for example:
{
"scripts": {
...
Evaluating a mathematical expression in a string
...+ expr + rpar)
).setParseAction(self.pushUMinus)
# by defining exponentiation as "atom [ ^ factor ]..." instead of
# "atom [ ^ atom ]...", we get right-to-left exponents, instead of left-to-right
# that is, 2^3^2 = 2^(3^2), not (2^3)^2.
factor = Forwar...
error: Unable to find vcvarsall.bat
...lled Visual Studio 2008. You can trick Python to use a newer Visual Studio by setting the correct path in VS90COMNTOOLS environment variable before calling setup.py.
Execute the following command based on the version of Visual Studio installed:
Visual Studio 2010 (VS10): SET VS90COMNTOOLS=%VS100C...
What is Linux’s native GUI API?
...tem. The graphical user interface found on most Linux desktops is provided by software called the X Window System, which defines a device independent way of dealing with screens, keyboards and pointer devices.
X Window defines a network protocol for communication, and any program that knows how to ...
How to calculate moving average using NumPy?
...sum, which may be is faster than FFT based methods:
EDIT Corrected an off-by-one wrong indexing spotted by Bean in the code. EDIT
def moving_average(a, n=3) :
ret = np.cumsum(a, dtype=float)
ret[n:] = ret[n:] - ret[:-n]
return ret[n - 1:] / n
>>> a = np.arange(20)
>>>...