code: function ( a, b ) {
  		return Math.sqrt( math.sqr( b[0] - a[0] ) + math.sqr( b[1] - a[1] ) );
  	}
docs: Finds the distance between 2 Arrays of coordinates
  
  @method dist
  @param  {Array} a Coordinates [x, y]
  @param  {Array} b Coordinates [x, y]
  @return {Number}  Distance between `a` & `b`