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Ruby has a deep bench of one-liner idioms that compress common patterns into expressive single expressions. Most are worth knowing. Several are worth avoiding. Here is an honest breakdown of both.
Read moreInheritance hierarchies in Ruby tend to collapse under their own weight. Modules give you a way out, but only if you understand method lookup, hook methods, and where the pattern breaks down.
Read moreMost Ruby performance advice is synthetic benchmark folklore. These are patterns that caused measurable production problems — and the specific changes that fixed them.
Read moreMost Ruby developers know symbols are "faster" than strings, but few can explain exactly why or when the difference is worth caring about. Here's where it genuinely matters at scale.
Read moreHibernate's second-level cache sits between the application and the database, caching entities across sessions. Configured correctly it eliminates repeated reads. Configured wrong it serves stale data silently, produces hard-to-debug invalidation failures, and breaks distributed deployments.
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