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Contents
module Bmg
module Algebra
module Shortcuts
def rxmatch(attrs, matcher, options = {})
predicate = attrs.inject(Predicate.contradiction){|p,a|
p | Predicate.match(a, matcher, options)
}
self.restrict(predicate)
end
def prefix(prefix, options = {})
raise "Attrlist must be known to use `prefix`" unless self.type.knows_attrlist?
attrs = self.type.to_attrlist
attrs = attrs - options[:but] if options[:but]
renaming = Hash[attrs.map{|a| [a, :"#{prefix}#{a}"] }]
self.rename(renaming)
end
def suffix(suffix, options = {})
raise "Attrlist must be known to use `suffix`" unless self.type.knows_attrlist?
attrs = self.type.to_attrlist
attrs = attrs - options[:but] if options[:but]
renaming = Hash[attrs.map{|a| [a, :"#{a}#{suffix}"] }]
self.rename(renaming)
end
def image(right, as = :image, on = [], options = {})
return super unless on.is_a?(Hash)
renaming = Hash[on.map{|k,v| [v,k] }]
self.image(right.rename(renaming), as, on.keys, options)
end
def join(right, on = [])
return super unless on.is_a?(Hash)
renaming = Hash[on.map{|k,v| [v,k] }]
self.join(right.rename(renaming), on.keys)
end
def matching(right, on = [])
return super unless on.is_a?(Hash)
renaming = Hash[on.map{|k,v| [v,k] }]
self.matching(right.rename(renaming), on.keys)
end
def not_matching(right, on = [])
return super unless on.is_a?(Hash)
renaming = Hash[on.map{|k,v| [v,k] }]
self.not_matching(right.rename(renaming), on.keys)
end
end # module Shortcuts
end # module Algebra
end # module Bmg
Version data entries
13 entries across 13 versions & 1 rubygems