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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
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To get over the nil issue, I'm copying the code from the OP's link (api.rubyonrails.org/classes/ActionView/Base.html) <% if local_assigns.has_key? :headline %> Headline: <%= headline %> <% end %> -- has_key avoids the nil / false situation, and probably...
iOS: How does one animate to new autolayout constraint (height)
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Beware: If using the UIViewAnimationOptionBeginFromCurrentState the layout constraints will be set BEFORE the animation!
– Robert
Sep 12 '14 at 8:15
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What does `kill -0 $pid` in a shell script do?
...at signal does '0' represent, because here I see SIGNAL numbers starting from 1.
6 Answers
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Correct way to quit a Qt program?
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QApplication is derived from QCoreApplication and thereby inherits quit() which is a public slot of QCoreApplication, so there is no difference between QApplication::quit() and QCoreApplication::quit().
As we can read in the documentation of QCoreA...
Convert a python dict to a string and back
... @AJ00200: and the ast.literal_eval alternative I mentioned?. From the Python help: "Safely evaluate an expression node or a string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, d...
What is an efficient way to implement a singleton pattern in Java? [closed]
...or private to prevent users to create their own Foo. Throwing an exception from the constructor prevents users to use reflection to create a second Foo. Then you create a private static final Foo field to hold the only instance, and a public static Foo getInstance() method to return it. The Java spe...
GlobalConfiguration.Configure() not present after Web API 2 and .NET 4.5.1 migration
...bly entry for System.Web.Http
Forcing a reinstall corrected the problem. From the NuGet package manager console:
update-Package -reinstall Microsoft.AspNet.WebApi.WebHost
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How do browser cookie domains work?
...n the Domain attribute value and the effective domain: the former is taken from the Set-Cookie header field and the latter is the interpretation of that attribute value. According to the RFC 2965, the following should apply:
If the Set-Cookie header field does not have a Domain attribute, the effe...
Node.js Web Application examples/tutorials [closed]
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Update
Dav Glass from Yahoo has given a talk at YuiConf2010 in November which is now available in Video from.
He shows to great extend how one can use YUI3 to render out widgets on the server side an make them work with GET requests when JS ...
“git diff” does nothing
...e, but "git diff" does nothing. To be safe, I removed external diff tools from my .gitconfig file. This was installed via MacPorts and is the lates version (1.7.2.2).
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