John Base John Base -4 years ago 126
Ruby Question

What's the difference between colon ":" and fat arrow "=>"

What's the difference between colon

:
and fat arrow
=>
in Ruby? Or when to use what?

:foo => true
foo: true

Answer Source

The syntax is for defining Hash key/value pairs, and the difference depends on the Ruby version.

Supported in both Ruby 1.8 and Ruby 1.9

:foo => true

Supported only in Ruby 1.9

foo: true

If you're developing in Ruby 1.9 you should probably use the syntax:

foo: true

as it appears to be the direction the community is moving in.

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