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How to elegantly rename all keys in a hash in Ruby? [duplicate]

...to do ages = Hash[ages.map {|k, v| [mappings[k] || k, v] }] to be able to call the variable again with the mapping. – Chanpory Nov 9 '10 at 20:32 ...
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Custom views with Storyboard

...complex screens (View Controllers) I used to separate the whole thing in smaller pieces (I call them widgets). These widgets consist basically of a MyWidget.h and a MyWidget.m file as well as a MyWidget.xib file, where the root element is a UIView and the MyWidget class is the File Owner of ...
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Formatting Numbers by padding with leading zeros in SQL Server

...zeroes, just assign or convert to an int and they will be removed automatically. – Jimbo Mar 1 '12 at 17:25 2 ...
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How to drop all user tables?

How can I drop all user tables in oracle? 9 Answers 9 ...
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Abstract functions in Swift Language

...the need of a return statement. EDIT: Just found out that this method basically is equal to fatalError() but it's the more proper way (Better documentation, introduced in Swift along with precondition(), assert() and assertionFailure(), read here) – Kametrixom ...
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CSS background image alt attribute

This is one I have not had to tackle before. I need to use alt tags on all images in a site including those used by CSS background-image attribute. ...
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Is there a unique Android device ID?

...at Anthony's answer. Full disclosure: my app used the below approach originally but no longer uses this approach, and we now use the approach outlined in the Android Developer Blog entry that emmby's answer links to (namely, generating and saving a UUID#randomUUID()). There are many answers to this...
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how do I work around log4net keeping changing publickeytoken

...em with the other answers are that they are using the same dll version for all bindings. I want to use features in the new version for everything else but the legacy dependency. To be able to do that you need to do the following: Start by downloading the old version (version of 1.2.11.0). Rename...
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A clean, lightweight alternative to Python's twisted? [closed]

...her Stackless Python microthreads or Greenlets for light-weight threading. All blocking network I/O is transparently made asynchronous through a single libevent loop, so it should be nearly as efficient as an real asynchronous server. I suppose it's similar to Eventlet in this way. The downside is...
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Can I concatenate multiple MySQL rows into one field?

... My need was to get ALL the data from one column. Don't use the GROUP BY clause to do this. Example : SELECT GROUP_CONCAT(emails SEPARATOR ', ') FROM users; – Jonathan Bergeron Jan 17 '14 at 14:04 ...