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The trick is to open the console, loop through the characters from 0 to 31, concatenate them and output to console, then copy it into the field. Note that this trick doesn't work with \r and \0. In Firefox, \r will just get converted to \n, and \0 kind of "terminates" the string so nothing is copied. In Chrome, the same thing happens, but \r\n sequence will be converted into a single \n instead of two like in Firefox's case.
Another trick is to programmatically set the regex string $("#regex_string")[0].value from the console. This trick allows you to test \0, but not \r. In Firefox and Chrome, \r\n or lone \r will be converted to just \n.
I need to match control characters found in ascii characters 0-33. Is there a way to use these in the "TEST STRING" textarea?
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