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What does the exclamation mark do before the function?
...put () at the end: !function foo() {}() which has higher precedence than ! and instantly calls the function.
So what the author is doing is saving a byte per function expression; a more readable way of writing it would be this:
(function(){})();
Lastly, ! makes the expression return true. This i...
How to create a dialog with “yes” and “no” options?
I am going to make a button to take an action and save the data into a database.
13 Answers
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Rails: confused about syntax for passing locals to partials
Understanding Rails "magic" with regards to rendering partials (and passing locals into them).
4 Answers
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Running JAR file on Windows
...amed helloworld.jar .
In order to run it, I'm executing the following command in a command-line window:
25 Answers
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Python - write() versus writelines() and concatenated strings
So I'm learning Python. I am going through the lessons and ran into a problem where I had to condense a great many target.write() into a single write() , while having a "\n" between each user input variable(the object of write() ).
...
Activate a virtualenv via fabric as deploy user
...y, activate the projects .virtualenv, which will change dir to the project and issue a git pull.
9 Answers
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Reading ePub format
...out how to download the EPUB, to unzip it somewhere, to parse the manifest and then to display the relevant content.
Some pointers if you're just starting out:
parse xml
unzip
To display content just use a UIWebView for now.
Here's a high level step by step for your code:
1) create a view wi...
How to debug an apache virtual host configuration?
...ck configuration files for syntax errors:
# Red Hat-based (Fedora, CentOS) and OSX
httpd -t
# Debian-based (Ubuntu)
apache2ctl -t
# MacOS
apachectl -t
List virtual hosts
To list all virtual hosts, and their locations:
# Red Hat-based (Fedora, CentOS) and OSX
httpd -S
# Debian-based (Ubuntu)
apac...
Print a list in reverse order with range()?
... may be less intuitive but as the comments mention, this is more efficient and the right usage of range for reversed list.
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Oracle: how to UPSERT (update or insert into a table?)
...swered Oct 27 '08 at 11:12
Tony AndrewsTony Andrews
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