The Many Facets of RubyGems
Version Constraints Examples
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Uses initial baseline functionality
require_gem "fictional", "~> 1.0"
Allows: 1.0.1, 1.0.2, 1.1.0
Uses old constructors, but needs DOM support
require_gem "fictional", "~> 1.1"
Allows: 1.1.0
Uses new constructors
require_gem "fictional", "~> 2.0"
Allows: 2.0.0
Copyright 2004 by Jim Weirich (
Some Rights Reserved
)