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Can table columns with a Foreign Key be NULL?
...et as "default" (by using null) or set to a value that happens to be the same as "default". By having a row with a null id, you can clearly indicate that this row is not to be used as a normal row, and can use the row as a way of providing a sort of dynamic default value for other rows.
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Why doesn't a python dict.update() return the object?
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Python's mostly implementing a pragmatically tinged flavor of command-query separation: mutators return None (with pragmatically induced exceptions such as pop;-) so they can't possibly be confused with accessors (and in the same vein, assignment...
Emacs, switch to previous window
In Emacs, C-x o takes me to the next window.
12 Answers
12
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Comparison of DES, Triple DES, AES, blowfish encryption for data
...ted more than ten years ago). Also, DES uses 64-bit blocks, which raises some potential issues when encrypting several gigabytes of data with the same key (a gigabyte is not that big nowadays).
3DES is a trick to reuse DES implementations, by cascading three instances of DES (with distinct keys). 3D...
How to reference a .css file on a razor view?
... />
@RenderSection("Styles", false)
</head>
and if I need some view specific styles I define the Styles section in each view:
@section Styles {
<link href="@Url.Content("~/Styles/view_specific_style.css")" rel="stylesheet" type="text/css" />
}
Edit: It's useful to know th...
json_encode is returning NULL?
For some reason the item "description" returns NULL with the following code:
10 Answers
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MySQL vs MySQLi when using PHP [closed]
...ul features are:
an Object-oriented interface
support for prepared statements
support for multiple statements
support for transactions
enhanced debugging capabilities
embedded server support.
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Comparing two CGRects
I needed to check wether the frame of my view is equal to a given CGRect. I tried doing that like this:
4 Answers
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angular.element vs document.getElementById or jQuery selector with spin (busy) control
I'm using the "Angularised" version of the Spin control, as documented here: http://blog.xvitcoder.com/adding-a-weel-progress-indicator-to-your-angularjs-application/
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What's the significance of Oct 12 1999? [closed]
In the SignOut method of System.Web.Security.FormsAuthentication , the ASP.NET team chose to expire the FormsAuth cookie by setting the expiration date to "Oct 12 1999".
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