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“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
... ? 'true' : 'false');
echo "\n";
});
Test the above snippet in the 3v4l.org online PHP editor
Although PHP does not require a variable declaration, it does recommend it in order to avoid some security vulnerabilities or bugs where one would forget to give a value to a variable that will be us...
How to check for file lock? [duplicate]
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edited Mar 14 '13 at 22:54
answered Aug 4 '08 at 14:59
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find -exec a shell function in Linux?
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14 Answers
14
Active
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“This project is incompatible with the current version of Visual Studio”
...n of Visual Studio
is due to an attempt to open a project targeting .Net 4.5, then the "solution" or workaround is to edit the .csproj file and change the TargetFrameworkVersion from "v4.5" to "v4.0". That at least allows the project to be loaded, although it may result in compiler errors if the p...
How to get the name of the calling method?
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Bryan Ash
4,01133 gold badges3434 silver badges5454 bronze badges
answered Feb 24 '11 at 4:25
DigitalRossDigita...
Numpy: Get random set of rows from 2D array
...> A
array([[1, 3, 0],
[3, 2, 0],
[0, 2, 1],
[1, 1, 4],
[3, 2, 2],
[0, 1, 0],
[1, 3, 1],
[0, 4, 1],
[2, 4, 2],
[3, 3, 1]])
>>> idx = np.random.randint(10, size=2)
>>> idx
array([7, 6])
>>> A[idx,:]
array([[0,...
Run an OLS regression with Pandas Data Frame
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154
I think you can almost do exactly what you thought would be ideal, using the statsmodels package...
How do I create a copy of an object in PHP?
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In PHP 5+ objects are passed by reference. In PHP 4 they are passed by value (that's why it had runtime pass by reference, which became deprecated).
You can use the 'clone' operator in PHP5 to copy objects:
$objectB = clone $objectA;
Also, it's just objects that are pass...
How do I do a not equal in Django queryset filtering?
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Dave VogtDave Vogt
13.4k66 gold badges3232 silver badges4949 bronze badges
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ERROR 1130 (HY000): Host '' is not allowed to connect to this MySQL server [duplicate]
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edited May 24 '16 at 17:28
Eric Wanchic
1,5451818 silver badges2121 bronze badges
answered...