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Does R have an assert statement as in python?
...topifnot()
You may also be interested in packages like Runit and testthat for unit testing.
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Fastest way to extract frames using ffmpeg?
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If the JPEG encoding step is too performance intensive, you could always store the frames uncompressed as BMP images:
ffmpeg -i file.mpg -r 1/1 $filename%03d.bmp
This also has the advantage of not incurring more quality loss through quantization by transcodi...
Rails layouts per action?
I use a different layout for some actions (mostly for the new action in most of the controllers).
7 Answers
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How to rename a file using Python
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not really, on 3.7 ubuntu, works for me using relative paths
– toing_toing
Feb 28 '19 at 15:51
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Can I change multiplier property for NSLayoutConstraint?
...line should always be the first line. because you have to deactivate one before activating the other one. or they will conflict.
zoomedConstraint.active = YES;
[self.view layoutIfNeeded]; // or using [UIView animate ...]
Swift 5.0 version
var standardConstraint: NSLayoutConstraint!
var zoomedCons...
Keyboard shortcuts in WPF
...e to hold a command (preferably as a property in a static class you create for commands - but for a simple example, just using a static attribute in window.cs):
public static RoutedCommand MyCommand = new RoutedCommand();
Add the shortcut key(s) that should invoke method:
MyCommand.InputGestures...
How do I resolve configuration errors with Nant 0.91?
...nt 0.91 zip file needed additional security related configuration to be performed: before extracting, one must right click on the zip file, select Properties and under the General tab, click the button labelled Unblock, then click OK on the Properties window. Now, extract the file to your desired lo...
Send email with PHPMailer - embed image in body
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For who need an explanation from a non expert: you need to tell the rendering engine from where to get the image and with what protocol (to use an image that is attached you use de cid "protocol, Content-ID). And you use AddE...
How to validate an email address using a regular expression?
...RFC 822 compliant regex is inefficient and obscure because of its length. Fortunately, RFC 822 was superseded twice and the current specification for email addresses is RFC 5322. RFC 5322 leads to a regex that can be understood if studied for a few minutes and is efficient enough for actual use.
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django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb
The problem Im facing while trying to connect to database for mysql. I have also given the database settings that i have used.
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