method

find_beginning_of_week!

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What's this?

find_beginning_of_week!(week_start) public

Returns week start day symbol (e.g. :monday), or raises an ArgumentError for invalid day symbol.

# File activesupport/lib/active_support/core_ext/date/calculations.rb, line 30
    def find_beginning_of_week!(week_start)
      raise ArgumentError, "Invalid beginning of week: #{week_start}" unless ::Date::DAYS_INTO_WEEK.key?(week_start)
      week_start
    end

find_beginning_of_week!

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