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| def QuickPath::predicate( elements, path ) ind = 1 bcount = 1 while bcount > 0 bcount += 1 if path[ind] == ?[ bcount -= 1 if path[ind] == ?] ind += 1 end ind -= 1 predicate = path[1..ind-1] rest = path[ind+1..-1] # have to change 'a [=<>] b [=<>] c' into 'a [=<>] b and b [=<>] c' predicate.gsub!( /([^\s(and)(or)<>=]+)\s*([<>=])\s*([^\s(and)(or)<>=]+)\s*([<>=])\s*([^\s(and)(or)<>=]+)/u ) { "#$1 #$2 #$3 and #$3 #$4 #$5" } # Let's do some Ruby trickery to avoid some work: predicate.gsub!( /&/u, "&&" ) predicate.gsub!( /=/u, "==" ) predicate.gsub!( /@(\w[-\w.]*)/u ) { "attribute(\"#$1\")" } predicate.gsub!( /\bmod\b/u, "%" ) predicate.gsub!( /\b(\w[-\w.]*\()/u ) { fname = $1 fname.gsub( /-/u, "_" ) } Functions.pair = [ 0, elements.size ] results = [] elements.each do |element| Functions.pair[0] += 1 Functions.node = element res = eval( predicate ) case res when true results << element when Fixnum results << element if Functions.pair[0] == res when String results << element end end return filter( results, rest ) end |