ruby - Understanding the tilde operator in Gemfile.lock -


i have dependency of following

i18n (~> 0.6, >= 0.6.4)

i've been having read through of ruby gems - declaring dependency guide

and i've found out '~> 0.6' part means between 0.6 , 1.0 - correct me if that's wrong.

but i'm still confused, mean second comma separated value?

a colleague believes means

>= 0.6.4, <= 0.7

but i'm not sure.

short answer: pointed holger in comments, ~> 0.6, >= 0.6.4 means >= 0.6.4 , < 1.0.

the ~> operator called pessimistic operator (or twiddle-wakka), , objective guard gems potential bugs/failures in future releases.

when you're building gem, must create special specification class , put in .gemspec file or in rakefile. class contains information gem, name, version, license , dependencies.

and practice specify dependencies following pessimistic version constraint. therefore, notations ~> 0.6, >= 0.6.4 common.

you can find more information here.


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