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What is the best django model field to use to represent a US dollar amount?

I need to store a U.S. $ dollar amount in a field of a Django model. What is the best model field type to use? I need to be able to have the user enter this value (with error checking, only want a number accurate to cents), format it for output to users in different places, and use it to calculate...
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How do PHP sessions work? (not “how are they used?”)

Session files are usually stored in, say, /tmp/ on the server, and named sess_{session_id} . I have been looking at the contents and cannot figure out how they really work. ...
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Web Reference vs. Service Reference

I just hit a huge brick wall with Paypal. I had created a regular C# project to create some wrapper classes using their WSDL. ...
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What's the difference between detaching a Fragment and removing it?

... detach and remove . The descriptions over there don't seem to provide much insight about when to use each, and from what I can tell they appear to be the same. ...
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jQuery’s .bind() vs. .on()

I found two great articles talking about the new function .on() : jquery4u.com , elijahmanor.com . 6 Answers ...
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How to commit changes to a new branch

I just made changes to a branch. How can I commit the changes to the other branch? 3 Answers ...
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nginx missing sites-available directory

I installed Nginx on Centos 6 and I am trying to set up virtual hosts. The problem I am having is that I can't seem to find the /etc/nginx/sites-available directory. ...
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Why am I getting an Exception with the message “Invalid setup on a non-virtual (overridable in VB) m

I have a unit test where I have to mock a non-virtual method that returns a bool type 6 Answers ...
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C# DropDownList with a Dictionary as DataSource

I want to set DataTextField and DataValueField of a Dropdownlist (languageList) using a Dictionary (list) of languageCod (en-gb) as key and language name (english) as the text to display. ...
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What is the _snowman param in Ruby on Rails 3 forms for?

In Ruby on Rails 3 (currently using Beta 4), I see that when using the form_tag or form_for helpers there is a hidden field named _snowman with the value of ☃ ( Unicode \x9731) showing up. ...