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⟩ Whats the difference between symbol and string?

Rails makes extensive use of symbols. A symbol looks like a

variable symbols name, but it’s prefixed with a colon.

Examples of symbols include :action,:line_items, and :id.

Rails uses symbols to identify things. In particular, it

uses them as keys when naming method parameters and looking

things up in hashes. For example:

redirect_to :action => "edit", :id => params[:id]

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