Question

I have CharSequence source, int start, int end

I would like to strip all “control characters” from source between start and end and return this as a new CharSequence

by “control character” I mean undeseriable characters like Tab and Return, line feeds and such… basically all that was in ASCII < 32 (space) … but I don’t know how to do it in this “modern age”

what is a char? is it unicode? How can I remove these “control characters” ?

Answer 1

Assuming that you can get the whole source into memory, you can do this:

String tmp = source.toString();
String prefix = tmp.substring(0, start-1);
String suffix = tmp.substring(end+1);
String middle = tmp.substring(start, end).replaceAll("\\s", "");
CharSequence res = prefix + middle + suffix;