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How do you create a random string that's suitable for a session ID in PostgreSQL?
I'd like to make a random string for use in session verification using PostgreSQL. I know I can get a random number with SELECT random() , so I tried SELECT md5(random()) , but that doesn't work. How can I do this?
...
Calculate tm>ex m>t width with JavaScript
...n read the current width and height of the DIV. It will stretch to fit the contents and the size will be within a few pixels of the string rendered size.
var fontSize = 12;
var test = document.getElementById("Test");
test.style.fontSize = fontSize;
var height = (test.clientHeight + 1) + "px"...
Do I really need to encode '&' as '&'?
...which is easier? which is easier to bugger up?
Methodology 1
Write some content which includes ampersand characters.
Encode them all.
Methodology 2
(with a grain of salt, please ;) )
Write some content which includes a ampersand characters.
On a case-by-case basis, look at each ampersand. De...
Programmer Puzzle: Encoding a chess board state throughout a game
...s.
Piece layout can be broadly handled in one of two ways: by storing the contents of each square or by storing the position of each piece.
Simple Contents
There are six piece types (pawn, rook, knight, bishop, queen and king). Each piece can be White or Black so a square may contain one of 12 po...
What is a NullReferencem>Ex m>ception, and how do I fix it?
... SelectionChanged="comboBox1_SelectionChanged">
<ComboBoxItem Content="Item 1" />
<ComboBoxItem Content="Item 2" />
<ComboBoxItem Content="Item 3" />
</ComboBox>
<!-- Label declared later -->
<Label Name="label1"
...
Check if a user has scrolled to the bottom
I'm making a pagination system (sort of like Facebook) where the content loads when the user scrolls to the bottom. I imagine the best way to do that is to find when the user is at the bottom of the page and run an ajax query to load more posts.
...
How to reset Jenkins security settings from the command line?
...your user (e.g. /var/lib/jenkins/users/username/config.xml) and update the contents of passwordHash:
<passwordHash>#jbcrypt:$2a$10$razd3L1aXndFfBNHO95aj.IVrFydsxkcQCcLmujmFQzll3hcUrY7S</passwordHash>
Once you have done this, just restart Jenkins and log in using this password:
test
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Calculate difference in keys contained in two Python dictionaries
...
Here is a class to find all the possibilities: what was added, what was removed, which key-value pairs are the same, and which key-value pairs are changed.
class DictDiffer(object):
"""
Calculate the difference between two dictionaries as:
(1) items added
(2) items removed
(3) ...
What are the most common SQL anti-patterns? [closed]
...an edit the grid in a website with a simple alter statement. Or change the content of an m>ex m>port, or reformat a date in a report. This makes clients happy, and saves me time. So thanks, but no thanks, I'll stick with queries like this.
– Andomar
May 18 '09 at 1...
Hibernate - A collection with cascade=”all-delete-orphan” was no longer referenced by the owning ent
...ime you want to add or delete something to the list you have to modify the contents of the list instead of assigning a new list.
To add children:
public void addChild(SonEntity aSon)
{
this.sonEntities.add(aSon);
}
To remove children:
public void removeChild(SonEntity aSon)
{
this.sonEn...