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Python + Django page redirect
...direct (e.g. cflocation in ColdFusion, or header(location:http://) for PHP) in Django?
10 Answers
...
Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
...expression2 are true.
So you can and them together as follows (-n is the opposite of -z so we can get rid of the !):
if [[ -n "$var" && -e "$var" ]] ; then
echo "'$var' is non-empty and the file exists"
fi
However, I don't think it's needed in this case, -e xyzzy is true if the xyzz...
Why does auto a=1; compile in C?
...hould reject code that contains such constructs. I would argue exactly the opposite, that a decent modern C compiler must still allow for this.
Both clang and gcc do just that when compiling the sample code in the question against the 1999 or 2011 versions of the standard. Both compilers issue a di...
How to show loading spinner in jQuery?
...img src="images/spinner.gif" alt="Wait" />');
$('#message').load('index.php?pg=ajaxFlashcard', null, function() {
$("#myDiv").html('');
});
This will make sure your animation starts at the same frame on subsequent requests (if that matters). Note that old versions of IE might have difficultie...
What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
...ternary operator but not the ternary operator. Major languages (C#, Java, PHP) consider it a conditional operator, and call it the ?: operator. Occasionally (JavaScript) it is called the conditional operator.
– Sheepy
May 30 '14 at 8:02
...
How can I rollback a github repository to a specific commit?
... undo.
git revert SHA
That will create a new commit that does the exact opposite of your commit. Then you can push this new commit to bring your app to the state it was before, and your git history will show these changes accordingly.
This is good for an immediate redo of something you just com...
Showing the stack trace from a running Python application
...tion at some point when your program starts up (You could even stick it in site.py to have all python programs use it), and let it run. At any point, send the process a SIGUSR1 signal, using kill, or in python:
os.kill(pid, signal.SIGUSR1)
This will cause the program to break to a python con...
How can one see the structure of a table in SQLite? [duplicate]
...
If you are using PHP you can get it this way:
<?php
$dbname = 'base.db';
$db = new SQLite3($dbname);
$sturturequery = $db->query("SELECT sql FROM sqlite_master WHERE name='foo'");
$table = $sturturequery->fetchArray...
raw vs. html_safe vs. h to unescape html
... In other words, html_safe is not "please make this html safe", it's the opposite - it is you the programmer telling rails that "this string is html safe, promise!"
– PaulMurrayCbr
Jan 10 '14 at 4:50
...
Changes in import statement python3
...
No, in fact it was the "opposite", "practicality beats purity" decision. That was necessary in order to optimize local variable access inside functions, since without "import *", compiler always knows just by analyzing the code, what variables are l...