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How to implement a queue with three stacks?
...iginal question
DETAILS
There are two implementations behind this link: http://www.eecs.usma.edu/webs/people/okasaki/jfp95/index.html
One of them is O(1) with three stacks BUT it uses lazy execution, which in practice creates extra intermediate data structures (closures).
Another of them is O(1...
Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?
...ion, you can only display the __unicode__ representation of a ForeignKey:
http://docs.djangoproject.com/en/dev/ref/contrib/admin/#list-display
Seems odd that it doesn't support the 'book__author' style format which is used everywhere else in the DB API.
Turns out there's a ticket for this feature...
Is it possible to ping a server from Javascript?
...that.good();};
this.start = new Date().getTime();
this.img.src = "http://" + ip;
this.timer = setTimeout(function() { _that.bad();}, 1500);
}
}
This works on all types of servers that I've tested (web servers, ftp servers, and game servers). It also works with ports. If anyone enco...
How to include PHP files that require an absolute path?
...ces.
(source)
Another solution would be to set an include path in your httpd.conf or an .htaccess file.
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Role/Purpose of ContextLoaderListener in Spring?
...
<?xml version="1.0" encoding="UTF-8"?>
<web-app
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee ...
Back to previous page with header( “Location: ” ); in PHP
...
try:
header('Location: ' . $_SERVER['HTTP_REFERER']);
Note that this may not work with secure pages (HTTPS) and it's a pretty bad idea overall as the header can be hijacked, sending the user to some other destination. The header may not even be sent by the bro...
UICollectionView Set number of columns
...
}
Additionally, here are 2 really good tutorials on UICollectionViews:
http://www.raywenderlich.com/22324/beginning-uicollectionview-in-ios-6-part-12
http://skeuo.com/uicollectionview-custom-layout-tutorial
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CSS hack大全 - 创意 - 清泛网 - 专注C/C++及内核技术
...码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="gb2312">
<head>
<meta http-equiv=Content-Type content="text/html; charset=gb2312"/>
<style type="text/css">
/*****...
How do you turn a Mongoose document into a plain object?
...I believe what you're looking for should be the result of doc.toObject().
http://mongoosejs.com/docs/api.html#document_Document-toObject
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How to find where a method is defined at runtime?
...is is really late, but here's how you can find where a method is defined:
http://gist.github.com/76951
# How to find out where a method comes from.
# Learned this from Dave Thomas while teaching Advanced Ruby Studio
# Makes the case for separating method definitions into
# modules, especially when...