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Reference - What does this error mean in PHP?
...t in the array.
A typical example of an Undefined Index notice would be (demo)
$data = array('foo' => '42', 'bar');
echo $data['spinach'];
echo $data[1];
Both spinach and 1 do not exist in the array, causing an E_NOTICE to be triggered.
The solution is to make sure the index or offset exist...
How do I draw a grid onto a plot in Python?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I produce an effect similar to the iOS 7 blur view?
...(UIImage*)getBlurredImage {
// You will want to calculate this in code based on the view you will be presenting.
CGSize size = CGSizeMake(200,200);
UIGraphicsBeginImageContext(size);
[view drawViewHierarchyInRect:(CGRect){CGPointZero, w, h} afterScreenUpdates:YES]; // view is the vi...
What does if __name__ == “__main__”: do?
...ary, but you want to have a script mode where it runs some unit tests or a demo.
Your module is only used as a main program, but it has some unit tests, and the testing framework works by importing .py files like your script and running special test functions. You don't want it to try running the s...
overlay two images in android to set an imageview
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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jQuery UI accordion that keeps multiple sections open?
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<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/themes/base/jquery-ui.css" rel="stylesheet" type="text/css" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8....
textarea's rows, and cols attribute in CSS
... including line-height, padding on the container (not calculating a height based on box-sizing), even taking into account different aspect ratios of fonts used to ensure the textbox displays the set number of rows of text which you cannot achieve by using css height.
– William ...
Can't find the 'libpq-fe.h header when trying to install pg gem
... For me after run brew install postgressql i run ARCHFLAGS="-arch x86_64" gem install pg and works fine.
– overallduka
Oct 31 '14 at 17:05
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How to check if object (variable) is defined in R?
... looking for exists. Keep in mind that using exists with names used by R's base packages would return true regardless of whether you defined the variable:
> exists("data")
[1] TRUE
To get around this (as pointed out by Bazz; see ?exists), use the inherits argument:
> exists("data", inherit...
Eclipse IDE: How to zoom in on text?
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Ctrl++ and Ctrl+- works (using Eclipse 4.2.1 Win 7 64bit) Nice plugin, Thanks!
– Crocodile
Jan 10 '13 at 6:31
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