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How do I create an empty array/matrix in NumPy?
...ay in NumPy (e.g. a 2D array m*n to store your matrix), in case you don't know m how many rows you will append and don't care about the computational cost Stephen Simmons mentioned (namely re-buildinging the array at each append), you can squeeze to 0 the dimension to which you want to append to: X ...
Using G++ to compile multiple .cpp and .h files
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Now that I've separated the classes to .h and .cpp files do I need to use a makefile or can I still use the "g++ main.cpp" command?
Compiling several files at once is a poor choice if you are going to put that into the Makef...
Concatenate multiple files but include filename as section headers
... to concatenate a number of text files into one large file in terminal. I know I can do this using the cat command. However, I would like the filename of each file to precede the "data dump" for that file. Anyone know how to do this?
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Removing pip's cache?
...pip maintainer) is stackoverflow.com/a/61762308/1931274. The best approach now is pip cache purge.
– pradyunsg
May 12 at 22:53
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How to get Bitmap from an Uri?
...data.getData(), I mean if I simply open some image from gallery and I all know is about its path, how can I get uri and bitmap?
– Umair
Jun 25 '16 at 21:47
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Send attachments with PHP Mail()?
...he main script file -- require_once('path/to/file/class.phpmailer.php');
Now, sending emails with attachments goes from being insanely difficult to incredibly easy:
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
$email = new PHPMailer();
$email->SetFrom('you@example.com...
“Wrap with try…catch” in IntelliJ?
...than the one before. I just got 11 - it's amazing how fast everything is, now that I'm running on SSDs. "Develop with pleasure", indeed.
– duffymo
Jan 4 '12 at 22:15
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How to make a button redirect to another page using jQuery or just Javascript
...ince it will be a proper search form eventually you should do it like that now if possible.
– DisgruntledGoat
Feb 10 '10 at 16:41
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Closing Database Connections in Java
..., conn may be null depending on where the code breaks. That's why this is known as the "safe" pattern.
– Pascal Thivent
Feb 8 '10 at 22:53
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How to get Sinatra to auto-reload the file after each change?
...eed to install rerun if you haven’t already:
$ gem install rerun
Now if you start your Sinatra app like this:
$ ruby app.rb
All you have to do for reloading is instead do this:
$ rerun 'ruby app.rb'
If you are for instance using rackup, instead do
the following:
$ reru...