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Is Disney's FastPass Valid and/or Useful Queue Theory
...u can get a FastPass which allows you to come back during a specified time block (usually a couple hours later) and only wait for 10 minutes or less. You can only be "waiting" for one ride at a time with a FastPass.
...
Skip List vs. Binary Search Tree
...gainst skip list? Let's see what Brown et al. "A General Technique for Non-blocking Trees" (2014) have to say:
with 128 threads, our algorithm outperforms Java’s non-blocking skiplist
by 13% to 156%, the lock-based AVL tree of Bronson et al. by 63% to 224%, and a RBT that uses software trans...
Checking network connection
...ine does not have a working internet connection, the DNS lookup itself may block the call to urllib_request.urlopen for more than a second. Thanks to @rzetterberg for pointing this out.
If the fixed IP address above is not working, you can find a current IP address for google.com (on unix) by run...
What is the “FS”/“GS” register intended for?
...tems. They're mostly dedicated to point to information about task control blocks, at least in the two major OSes now available for x86 chips. And, since they are no longer "general purpose" even for their original intent, you can't use them for much. Better to pretend on x86-64 systems that the...
What is the difference between square brackets and parentheses in a regex?
...uestion uses keyword var in code, this probably is JavaScript). The use of php which runs on PCRE for preg matching will optimize away the lack of backtracking, however we're not in PHP either, so using classes [] instead of alternations | gives performance bonus as the match does not backtrack, and...
jQuery UI “ $(”#datepicker“).datepicker is not a function”
...es) Use the following
technique, which allows you to use $
inside of a block of code without
permanently overwriting $:
(function($) { /* some code that uses $ */ })(jQuery)
Note: If you use this
technique, you will not be able to use
Prototype methods inside this capsuled
functio...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...have distinctly un-uniform output.
Inspired by this article about how bad php's rand() function is, I made some random matrix images using QuickRandom and System.Random. This run shows how sometimes the seed can have a bad effect (in this case favouring lower numbers) where as System.Random is pret...
Execute JavaScript code stored as a string
...
I tried this inside a try/catch block, and it works perfectly. I can now take any JavaScript code typed into a text block, pass it to my function, and execute it. The catch block can then insert error messages from the JavaScript engine into a DOM element a...
Fixed page header overlaps in-page anchors
... :target pseudo-class in CSS:
:target::before {
content: "";
display: block;
height: 60px; /* fixed header height*/
margin: -60px 0 0; /* negative fixed header height */
}
Or scroll the page relative to :target with jQuery:
var offset = $(':target').offset();
var scrollto = offset.top - ...
Load image from url
...
You really ought to not to use that, as it blocks the UI thread. This library will handle threading and downloading for you: github.com/koush/UrlImageViewHelper
– koush
Aug 24 '12 at 4:49
...