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Append a NumPy array to a NumPy array
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I found this link while looking for something slightly different, how to start appending array objects to an empty numpy array, but tried all the solutions on this page to no avail.
Then I found this question and answer: How to add a new row to an empty numpy array
The gist here:
The way to "star...
Block Comments in a Shell Script
...t;ESC>
:10,100s/^/#/
(that reads, from line 10 to 100 substitute line start (^) with a # sign.)
and un comment with
<ESC>
:10,100s/^#//
(that reads, from line 10 to 100 substitute line start (^) followed by # with noting //.)
vi is almost universal anywhere where there is /bin/sh. ...
'pip' is not recognized as an internal or external command
... only, not in the current command window". In particular, you will need to start a new cmd.exe instance after entering the above command in order to utilize the new environment variable.
Thanks to Scott Bartell for pointing this out.
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set gvim font in .vimrc file
...imrc or $VIM\_gvimrc.
Check the :help .gvimrc for details. In essence, on start-up VIM reads the .vimrc. After that, if GUI is activated, it also reads the .gvimrc. IOW, all VIM general settings should be kept in .vimrc, all GUI specific things in .gvimrc. (But if you do no use console VIM then you...
Zero-based month numbering [closed]
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The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting...
Selenium: FirefoxProfile exception Can't load the profile
...um.webdriver.firefox.firefox_binary.launch_browser():
replace:
self._start_from_profile_path(self.profile.path)
with:
from subprocess import Popen, PIPE
proc = Popen(['cygpath','-d',self.profile.path], stdout=PIPE, stderr=PIPE)
stdout, stderr = proc.communicate()
path = stdo...
Change the current directory from a Bash script
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When you start your script, a new process is created that only inherits your environment. When it ends, it ends. Your current environment stays as it is.
Instead, you can start your script like this:
. myscript.sh
The . will evalu...
Why should I use version control? [closed]
...ne-man workflow with: what did I do yesterday?
Just go ahead and try it. Start slowly with basic features and learn others as you go. You will soon find that you won't ever want to go back to "the dark ages" of no VCS.
If you want a local VCS you can setup your own subversion server (what I did i...
How To Set Up GUI On Amazon EC2 Ubuntu server
...config # edit line "PasswordAuthentication" to yes
sudo /etc/init.d/ssh restart
Setting up ui based ubuntu machine on AWS.
In security group open port 5901. Then ssh to the server instance. Run following commands to install ui and vnc server:
sudo apt-get update
sudo apt-get install ubuntu-desk...
Why doesn't os.path.join() work in this case?
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The latter strings shouldn't start with a slash. If they start with a slash, then they're considered an "absolute path" and everything before them is discarded.
Quoting the Python docs for os.path.join:
If a component is an absolute path, all previo...