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How to check if a variable exists in a FreeMarker template?
...ter fit:
<#if userName?has_content>
... do something
</#if>
http://freemarker.sourceforge.net/docs/ref_builtins_expert.html
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Interface vs Abstract Class (general OO)
...ethods are non-virtual methods that 'thunk' to private virtual methods:
http://www.gotw.ca/publications/mill18.htm
http://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Non-Virtual_Interface
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How do browser cookie domains work?
...suffix domains. I've written an article explaining the current situation - http://bayou.io/draft/cookie.domain.html
To summarize, rules to follow regarding cookie domain:
The origin domain of a cookie is the domain of the originating request.
If the origin domain is an IP, the cookie's domain att...
How to Sync iPhone Core Data with web server, and then push to other devices? [closed]
...ould never be modified by the client.
guid - Add a globally unique id (see http://en.wikipedia.org/wiki/Globally_unique_identifier) field to the server and core data model. This field becomes the primary key and becomes important when creating new records on the client. Normally your primary key i...
Prevent scrolling of parent element when inner element scroll position reaches top/bottom? [duplicat
...ossible with the use of Brandon Aaron's Mousewheel plugin.
Here's a demo: http://jsbin.com/jivutakama/edit?html,js,output
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log4net vs. Nlog
...ue with Log4Net, here is an article I wrote on how to get started with it:
http://elegantcode.com/2007/12/07/getting-started-with-log4net/
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edited Jul 25 '09 at 20:45
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How to delete a word and go into insert mode in Vim?
...ter, try: "change inner { block" and "change a { block".
Documentation at http://vimdoc.sourceforge.net/htmldoc/motion.html#text-objects
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How to get all child inputs of a div element (jQuery)
..., etc.
you can read about available css-selectors of pseudo-classes here: http://docs.jquery.com/DOM/Traversing/Selectors#CSS_Selectors
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Pandas dataframe get first row of each group
...nth(0) is the same as first()):
df.groupby('id').nth(1)
Documentation: http://pandas.pydata.org/pandas-docs/stable/groupby.html#taking-the-nth-row-of-each-group
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TCP loopback connection vs Unix Domain Socket performance
...
given that the first link is dead (HTTP 404)... this is why stackoverflow best-practice is to at least provide a short/concise relevant quote from the source URL at the time of the answer writing (then when the link goes down the short summary is still availab...