Syntax look up search site?

I need to findout what certain syntax is when searching through code…
Do you know of any? Example this like this => @ @@ and so on, I know I
keep running into them and at somepoints => is a hash but at some points
:action => ‘index’ => is not a hash…

Google returns zilch when I enter => and other syntax I need to lookup

Please help :smiley:

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