nl_tokens: Reduce the array to index of an element which contains or is the nearest one matching a given phrase .
pl_tokens: function shrink ( arr , phrase ) { var len = arr . length , sub ; if ( len > 1 ) { len = len >> 1 ; var key = _adaptKey ( arr [ len ] ) ; if ( phrase < key ) { sub = arr . slice ( 0 , len ) ; sub . pos = arr . pos ; } else { sub = arr . slice ( len ) ; <mask> . pos = ( arr . pos || 0 ) + len ; } return shrink ( sub , phrase ) ; } else { return ( arr . pos || 0 ) + ( phrase <= _adaptKey ( arr [ 0 ] ) ? 0 : 1 ) ; } }