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What's New in Edge Rails: Object.try

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rwdaigle

Posts: 312
Nickname: rwdaigle
Registered: Feb, 2003

Ryan is a passionate ruby developer with a strong Java background.
What's New in Edge Rails: Object.try Posted: Nov 19, 2008 9:48 PM
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This post originated from an RSS feed registered with Ruby Buzz by rwdaigle.
Original Post: What's New in Edge Rails: Object.try
Feed Title: Ryan's Scraps
Feed URL: http://feeds.feedburner.com/RyansScraps
Feed Description: Ryan Daigle's various technically inclined rants along w/ the "What's new in Edge Rails" series.
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Those of you using Chris Wanstrath’s slick little try trick will now have access to that functionality in Rails with this ActiveSupport update.

Basically, try lets you attempt to invoke a method on an object without worrying about a NoMethodError being raised. If the method doesn’t exist, or if the target object nil, then nil will be returned without exceptions:

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# No exceptions when receiver is nil
nil.try(:destroy) #=> nil

# Useful when chaining potential nil items
User.admins.first.try(:address).try(:reset)

Just a small little bit of syntactical candy pulled in from the community.

tags: ruby, rubyonrails

Read: What's New in Edge Rails: Object.try

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