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objectification
How Ruby encourages bad OOP design
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bulk_insert
MySQL-dependent efficient bulk create for ActiveRecord models
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secret
Modify a core class ... secretly
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monomorphic
Fully featured joining to subtypes of polymorphic associations
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duck, duck, goose
If it quacks, does it really quack like a duck?
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offline_lookup
An easy gem to avoid db queries for lookup tables
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left_join
Perform LEFT OUTER JOIN using Arel in Rail 4
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secure404
Using middleware to tighten staging environment security