What does send() do in Ruby?

Question

Can someone please tell me what

send(\"#{Model.find...}\")

is and does?

Answer 1

send sends a message to an object instance and its ancestors in class hierarchy until some method reacts (because its name matches the first argument).

Practically speaking, those lines are equivalent:

1.send '+', 2
1.+(2)
1 + 2

Note that send bypasses visibility checks, so that you can call private methods, too (useful for unit testing).

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If there is really no variable before send, that means that the global Object is used:

send :to_s    # "main"
send :class   # Object