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What does new self(); mean in PHP?
...ends MyParentClass {
}
$a = MyChildClass::getInstance();
var_dump($a);
And you'd get this kind of output :
object(MyParentClass)#1 (0) { }
Which means self means MyParentClass -- i.e. here too, the class in which it is written.
With PHP < 5.3, that "the class in which it is written" ...
XPath with multiple conditions
...hat XPath can I use to select any category with a name attribute specified and any child node author with the value specified.
...
.gitignore exclude folder but include specific subfolder
...ing /* is significant:
The pattern dir/ excludes a directory named dir and (implicitly) everything under it.
With dir/, Git will never look at anything under dir, and thus will never apply any of the “un-exclude” patterns to anything under dir.
The pattern dir/* says nothing about dir itself...
How to find the port for MS SQL Server 2008?
...
On my computer, running Windows 10 and with SQL Server 2012 Express installed, SQL Server Configuration Manager isn't listed in the Windows start menu but can be found in the Computer Management MMC snap-in under the Services and Applications group. The dynami...
Get city name using geolocation
I managed to get the user's latitude and longitude using HTML-based geolocation.
11 Answers
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Detect Click into Iframe using JavaScript
I understand that it is not possible to tell what the user is doing inside an iframe if it is cross domain. What I would like to do is track if the user clicked at all in the iframe . I imagine a scenario where there is an invisible div on top of the iframe and the the div will just then ...
surface plots in matplotlib
...ing projection='3d' in add_subplot
import matplotlib.pyplot as plt
import random
def fun(x, y):
return x**2 + y
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
x = y = np.arange(-3.0, 3.0, 0.05)
X, Y = np.meshgrid(x, y)
zs = np.array(fun(np.ravel(X), np.ravel(Y)))
Z = zs.reshape(...
How to import a single table in to mysql database using command line
I had successfully imported a database using command line, but now my pain area is how to import a single table with its data to the existing database using command line.
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Why did my Git repo enter a detached HEAD state?
...t 2.23 (August 2019), you don't have to use the confusing git checkout command anymore.
git switch can also checkout a branch, and get a detach HEAD, except:
it has an explicit --detach option
To check out commit HEAD~3 for temporary inspection or experiment without creating a new branch:
g...
Why is there no SortedList in Java?
In Java there are the SortedSet and SortedMap interfaces. Both belong to the Java Collections framework and provide a sorted way to access the elements.
...