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Filtering for empty or NULL names in a queryset
...have first_name , last_name & alias (optional) which I need to search for. So, I need a query to give me all the names that have an alias set.
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Convert all first letter to upper case, rest lower for each word
...gard to what kind of word it is. It's not really "title case" since rules for title casing differ in different languages. It's not even correct for English. For instance, the title "about a boy" should be "About a Boy" in English, but this method would give "About A Boy". If you want true title ...
Code Golf: Collatz Conjecture
Inspired by http://xkcd.com/710/ here is a code golf for it.
70 Answers
70
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How can I open multiple files using “with open” in Python?
...contextlib.nested() to nest context managers. This won't work as expected for opening multiples files, though -- see the linked documentation for details.
In the rare case that you want to open a variable number of files all at the same time, you can use contextlib.ExitStack, starting from Pytho...
How to properly add cross-site request forgery (CSRF) token using PHP
I am trying to add some security to the forms on my website. One of the forms uses AJAX and the other is a straightforward "contact us" form. I'm trying to add a CSRF token. The problem I'm having is that the token is only showing up in the HTML "value" some of the time. The rest of the time, the va...
pretty-print JSON using JavaScript
How can I display JSON in an easy-to-read (for human readers) format? I'm looking primarily for indentation and whitespace, with perhaps even colors / font-styles / etc.
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Regular Expression for alphanumeric and underscores
...those characters (or an empty string), try
"^[a-zA-Z0-9_]*$"
This works for .NET regular expressions, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase letter
0-9 : any digit
_ : u...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
I plan to store foreign account information for my users on my website, aka rapidshare username and passwords, etc... I want to keep information secure, but I know that if I hash their information, I can't retrieve it for later use.
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What are the differences between json and simplejson Python modules?
...repeat = REPEAT, number = NUMBER))
print " json dumps {} seconds".format(result)
result = min(repeat("simplejson.dumps(compare_json_and_simplejson.data)", "from __main__ import simplejson, compare_json_and_simplejson",
repeat = REPEAT, number = NUMBER))
print "simp...
How many GCC optimization levels are there?
...rfere with debugging. It should be the
optimization level of choice for the standard edit-compile-debug cycle, offering a reasonable level of optimization
while maintaining fast compilation and a good debugging experience.)
-Os (Optimize for size. -Os enables all -O2 optimizations that...