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Creating a singleton in Python
...bute.
A metaclass essentially decides what the definition of a class means and how to implement that definition. See for example http://code.activestate.com/recipes/498149/, which essentially recreates C-style structs in Python using metaclasses. The thread What are some (concrete) use-cases for met...
How to style a checkbox using CSS
... availability of CSS 3. In modern browsers (including Internet Explorer 9 and later) it is more straightforward to create checkbox replacements with your preferred styling, without using JavaScript.
Here are some useful links:
Creating Custom Form Checkboxes with Just CSS
Easy CSS Checkbox Gener...
Bash function to find newest file matching pattern
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The ls command has a parameter -t to sort by time. You can then grab the first (newest) with head -1.
ls -t b2* | head -1
But beware: Why you shouldn't parse the output of ls
My personal opinion: parsing ls is only dangerous when th...
Explain “claims-based authentication” to a 5-year-old
Well, not exactly to a 5-year-old, but please avoid buzzword and enterprisespeak if possible.
6 Answers
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LEFT OUTER JOIN in LINQ
...ay to do that with where clause?
Correct problem:
For inner join is easy and I have a solution like this
22 Answers
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How do I create an array of strings in C?
...se pointers will then be set to the addresses of the static strings "blah" and "hmm".
If you do want to be able to change the actual string content, the you have to do something like
char a[2][14];
strcpy(a[0], "blah");
strcpy(a[1], "hmm");
This will allocate two consecutive arrays of 14 chars e...
Equation for testing if a point is inside a circle
If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle?
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mysql_config not found when installing mysqldb python interface
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mySQLdb is a python interface for mysql, but it is not mysql itself. And apparently mySQLdb needs the command 'mysql_config', so you need to install that first.
Can you confirm that you did or did not install mysql itself, by running "mysql" from the shell? That should give you a response oth...
Environment variables in Mac OS X
...ete answer . Having to set the path or variable in two places (one for GUI and one for shell) is lame.
9 Answers
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How do I make a Git commit in the past?
I'm converting everything over to Git for my own personal use and I found some old versions of a file already in the repository. How do I commit it to the history in the correct order according the file's "date modified" so I have an accurate history of the file?
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