Abstract: Implementations of the disclosed subject matter provide a method that includes receiving, at a communications interface, one or more control signals to control a drive system of the mobile robot to move within an area. A surface within the area and/or an object within the area may be detected using at least one sensor of the mobile robot. Using a processor communicatively coupled to the at least one sensor, the area may be mapped in two dimensions (2D) or three dimensions (3D) based on the detecting of at least one of the surface and the object as the mobile robot moves within the area based on the one or more received control signals. The method may include mapping, using the processor and the communications interface, wireless network communication signal strength as the mobile robot moves within the area based on the one or more received control signals.

Abstract: Implementations of the disclosed subject matter provide a mobile robot that moves within an area and captures image data by an image sensor. A position of text, an image, and/or video on a display screen of a display mounted to the mobile robot may be adjusted based on the image data captured by the mobile robot that includes one or more persons that are within the area. The text, the image, and/or the video may be at the adjusted position in the display screen of the display and audio via a speaker of the mobile robot to the one or more persons based on their heights, eye level, whether they are seated, or the like.

Abstract: A method and apparatus for processing source code in a language processing system with improved parsing based on prefix analysis. A method in accordance with the present invention includes the steps of identifying a previously-parsed prefix of a source code translation unit; creating a parser in a parser state corresponding to the identified prefix; and parsing a remaining portion of the translation unit after the prefix using the parser in the parser state corresponding to the prefix. In one embodiment of the invention, the step of creating a parser includes retrieving stored level-one subtrees corresponding to the top-level statements in the prefix. The level-one subtrees corresponding to the prefix may be stored in the form of a prefix tree along with the text of the top-level source code statements represented by the prefix and a parser delta indicating the effect of the code statements on the parser state.