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A key value store for storing per-developer environment and application keys

Flay analyzes code for structural similarities. Differences in literal values, variable, class, method names, whitespace, programming style, braces vs do/end, etc are all ignored.

Run shell commands safely, even with user-supplied values

csvreader library / gem - read tabular data in the comma-separated values (csv) format the right way (uses best practices out-of-the-box with zero-configuration)

• csv
• csv11
• json
• tab

Lightweight, zero-dependency Ruby library for parsing the Accept-Language HTTP header. Implements RFC 4647 Basic Filtering to match user language preferences against available locales. Supports quality values, wildcards, exclusions, prefix matching, and BCP 47 tags.

• http
• accept-language-parser
• accept-language

Counter caches for Rails computed from any block, such as conditional counts or sums, kept up to date by callbacks on any number of models and stored in a column, a shared counters table or your cache store. Recounts run after commit, so concurrent saves can't leave a stale value.