characters U+0000 (NULL) through U+0020 (SPACE) to be whitespace. Non-space blanks The Braille Patterns Unicode block contains , a Braille pattern with no dots raised. The Unicode standard explicitly states that it does not act as a space. The Non-breaking space can also be treated as non-space for trimming purposes. Usage References External links Tcl: string trim Faster JavaScript Trim - compares various JavaScript trim implementations php string cut and trimming- php string cut and trimming Articles with example code String (computer science)