48 lines
1.3 KiB
Ruby
48 lines
1.3 KiB
Ruby
#
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# Copyright (C) 2011 Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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class SortFirstClass
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include Comparable
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def <=>(b)
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b.is_a?(SortFirstClass) ? 0 : -1
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end
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# String#<=> checks if its arg is a string, and if it's not, calls to_str.
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# as long as to_str doesn't throw an error, then it calls arg <=> self,
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# ignoring the result of to_str. I figured to_str result of nil makes more
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# sense than returning a non-string from to_str
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def to_str
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nil
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end
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def to_datetime
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-Date::Infinity.new
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end
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def inspect
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'SortFirst'
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end
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# when coercing, we're inverting the operation, so invert the result
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def coerce(something)
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[SortLast, something]
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end
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end
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SortFirst = SortFirstClass.new
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