4e14ccc74d
Instiki now runs on the Rails 2.3.0 Candidate Release.
Among other improvements, this means that it now
automagically selects between WEBrick and Mongrel.
Just run
./instiki --daemon
41 lines
1.3 KiB
Ruby
41 lines
1.3 KiB
Ruby
module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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module Hash #:nodoc:
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# Slice a hash to include only the given keys. This is useful for
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# limiting an options hash to valid keys before passing to a method:
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#
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# def search(criteria = {})
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# assert_valid_keys(:mass, :velocity, :time)
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# end
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#
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# search(options.slice(:mass, :velocity, :time))
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#
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# If you have an array of keys you want to limit to, you should splat them:
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#
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# valid_keys = [:mass, :velocity, :time]
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# search(options.slice(*valid_keys))
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module Slice
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# Returns a new hash with only the given keys.
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def slice(*keys)
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keys = keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)
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hash = self.class.new
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keys.each { |k| hash[k] = self[k] if has_key?(k) }
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hash
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end
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# Replaces the hash with only the given keys.
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# Returns a hash contained the removed key/value pairs
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# {:a => 1, :b => 2, :c => 3, :d => 4}.slice!(:a, :b) # => {:c => 3, :d =>4}
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def slice!(*keys)
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keys = keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)
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omit = slice(*self.keys - keys)
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hash = slice(*keys)
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replace(hash)
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omit
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end
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end
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end
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end
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end
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