nl_tokens: Used by sortBy to compare transformed collection elements stable sorting them in ascending order .
pl_tokens: function compareAscending ( a , b ) { var ac = a . criteria , bc = b . criteria ; // ensure a stable sort in V8 and other engines // http://code.google.com/p/v8/issues/detail?id=90 if ( ac !== bc ) { if ( ac > bc || typeof ac == 'undefined' ) { return 1 ; } if ( ac < bc || typeof bc == 'undefined' ) { return - 1 ; } } // The JS engine embedded in Adobe applications like InDesign has a buggy // `Array#sort` implementation that causes it, under certain circumstances, // to return the same value for `a` and `b`. // See https://github.com/jashkenas/underscore/pull/1247 return a . <mask> - b . index ; }