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start_with? 

        # String.start_with?

(from ruby core)
---
    str.start_with?([prefixes]+)   -> true or false

---

Returns true if `str` starts with one of the `prefixes` given. Each of
the `prefixes` should be a String or a Regexp.

    "hello".start_with?("hell")               #=> true
    "hello".start_with?(/H/i)                 #=> true

    # returns true if one of the prefixes matches.
    "hello".start_with?("heaven", "hell")     #=> true
    "hello".start_with?("heaven", "paradise") #=> false

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